220 results about "Carbon felt" patented technology

The invention relates to a coal chemical wastewater treatment device with nano-catalysis coupled with bioelectrochemistry. The invention belongs to the technical field of coal chemical wastewater treatment. The device comprises a pretreatment area, a bioelectrochemical treatment area, a catalyst recovery area and a clear water area which are connected in sequence, a nano Fe3O4 / TiO2 composite catalyst filling layer and a microporous aeration device are arranged in the pretreatment area; a biological anode region of the biological electrochemical treatment region adopts a graphene modified carbon brush, and a biological cathode region of the biological electrochemical treatment region adopts a sulfur-doped carbon felt; and the catalyst recovery area adopts a high-gradient permanent magnetic roller and is matched with a pulse backwashing system. The treatment cost of each ton of water is reduced to 25-35 yuan, and the cycle life of the catalyst is gt; the time is 200 times; the sulfur can be reused in a desulfurization process of a sewage treatment plant, so that the medicament cost is reduced; the carbon emission is reduced by 60%; the COD removal rate is not less than 95%, the total phenol removal rate is not less than 98%, and the total nitrogen removal rate is not less than 90%; energy consumption is reduced by 40% compared with a traditional electrochemical method, and the catalyst recovery rate is gt; 95%.

The invention discloses a preparation method of a modified zinc-bromine flow battery carbon felt negative electrode and the carbon felt negative electrode prepared by the method, and belongs to the field of zinc-bromine flow batteries. According to the method, after the carbon felt is soaked in a mixed solution of cuprous sulfate, water and acetonitrile, the acetonitrile is gradually evaporated from the solution through heating, the cuprous sulfate is gradually subjected to disproportionation reaction, and the copper elementary substance generated by the disproportionation reaction of the cuprous sulfate is deposited on the surface of the carbon felt, so that the purpose of loading the modified carbon felt with the copper elementary substance is achieved. The copper elementary substance is relatively stable in chemical property and has good zinc affinity, and the copper elementary substance is loaded on the surface of the carbon felt, so that the overpotential of zinc nucleation can be reduced, and reaction active sites on the surface of the carbon felt are increased. Besides, relatively strong acting force exists between copper and zinc, so that uniform deposition / stripping of zinc in the charging and discharging process is facilitated, a more uniform zinc deposition layer is formed on the surface of the carbon felt, formation of zinc dendrites is reduced, and the electrochemical performance of the zinc-bromine flow battery is improved.

The invention provides silicon nitride and aluminum nitride powder and a preparation method, and relates to the technical field of ceramic powder. The preparation method of the silicon nitride and aluminum nitride powder comprises the following steps: mixing aluminum powder and aluminum nitride raw powder to obtain a first mixture; mixing silicon powder, silicon nitride raw powder and ammonium salt to obtain a second mixture; paving the first mixture and the second mixture in a material frame padded with a carbon felt, and separating the first mixture from the second mixture by using the carbon felt; the material frame is placed in a self-propagating reaction kettle, nitrogen is introduced after vacuumizing, and the first mixture is ignited so as to induce a combustion synthesis reaction of the second mixture; and after the combustion synthesis reaction, cooling to room temperature, releasing the pressure in the self-propagating reaction kettle, taking out a synthetic product, and grinding the synthetic product to obtain silicon nitride powder and aluminum nitride powder. The purity of the powder material can be improved.

The invention discloses a composite material and application thereof in electrochemical carbon dioxide capture, and belongs to the technical field of electrochemistry and carbon dioxide capture. The composite material provided by the invention comprises a carbon felt and a 1, 4-naphthoquinone compound, the 1, 4-naphthoquinone compound is loaded on the carbon felt; the 1, 4-naphthoquinone compound comprises at least one of 1, 4-naphthoquinone, 2-methyl-1, 4-naphthoquinone or 2, 3-dimethyl-1, 4-naphthoquinone, and the compound is a compound of the 1, 4-naphthoquinone, the 2-methyl-1, 4-naphthoquinone and the 2, 3-dimethyl-1, 4-naphthoquinone. In the composite material disclosed by the invention, a 1, 4-naphthoquinone structure of the 1, 4-naphthoquinone compound can realize specific capture of CO2 through a reversible oxidation-reduction reaction, a carbon felt three-dimensional porous framework provides a smooth channel for CO2 mass transfer and electron transmission, and the 1, 4-naphthoquinone structure and the carbon felt three-dimensional porous framework cooperate with each other to solve the problems of low capture capacity, poor stability and high energy consumption of a traditional carbon material; therefore, the method has a good application prospect in electrochemical carbon dioxide capture.

The invention discloses a carbon felt electrode for a zinc-bromine flow battery as well as a preparation method and application, and belongs to the technical field of zinc-bromine flow battery production, the method comprises the following steps: immersing a carbon felt into an acid solution for chemical etching, etching uniform grooves in the carbon fiber surface of the carbon felt, cleaning and drying to obtain a pretreated carbon felt; the preparation method comprises the following steps: dissolving tin salt and nickel salt in deionized water, and adding a hydrolysis inhibitor to obtain a precursor solution; and immersing the pretreated carbon felt into the precursor solution, carrying out electro-deposition under constant current by adopting a direct-current power supply by taking the re-selected untreated carbon felt as a counter electrode, washing the pretreated carbon felt subjected to electro-deposition with water, and drying for the second time to obtain the carbon felt electrode for the zinc-bromine flow battery. By utilizing the zinc affinity of Sn and Ni, zinc is preferentially deposited on Sn and Ni sites of the carbon felt electrode, the deposition depth is obviously enlarged, the zinc deposition space is optimized, the zinc deposition area capacity is effectively improved, and the problem that the surface capacity of the carbon felt electrode is limited is solved.

The application discloses a carbon nitride / carbon felt electrode for a vanadium redox flow battery and a preparation method thereof, and belongs to the technical field of battery materials. The preparation method comprises the following steps: (1) soaking carbon felt in an ethanol solution containing an iron salt compound and then drying; (2) suspending the dried carbon felt in a closed container, adding a pyrrole monomer, and reacting at a constant temperature under an inert atmosphere to obtain a polypyrrole / carbon felt, which is cleaned and dried; (3) soaking the polypyrrole / carbon felt in an ethanol solution containing a zinc salt compound and then drying; (4) gradually increasing the temperature of the dried polypyrrole / carbon felt under an inert atmosphere to perform high-temperature carbonization, and obtaining carbon nitride / carbon felt; and (5) performing pickling and water washing on the carbon nitride / carbon felt, and obtaining the carbon nitride / carbon felt electrode after drying. In the application, the iron salt is used to catalyze the polymerization and deposition of pyrrole on the surface of the carbon felt, and finally high-temperature carbonization is performed to form various nitrogen-doped structures on the surface of the carbon felt, so that the liquid affinity and the electrochemical reaction activity of the electrode surface are significantly improved, and the energy efficiency of the battery is improved.

The invention discloses a preparation method of a modified zinc-bromine flow battery carbon felt negative electrode and the carbon felt negative electrode prepared by the method, and belongs to the field of zinc-bromine flow batteries. A copper organic matter precursor is heated and gasified in a double-temperature-zone tubular furnace, molecules of the partially gasified copper organic matter precursor are loaded to the position where a carbon felt is located by hydrogen and adsorbed on the carbon felt, the copper organic matter precursor reacts with the hydrogen to form a copper elementary substance, and the copper elementary substance is attached to the surface of the carbon felt to form a load. Therefore, the purpose of modifying the carbon felt by loading the copper elementary substance is achieved. According to the method, the obstruction of low conductivity of the loaded oxide on electron transfer in the zinc deposition / stripping process is overcome; inactivation caused by reaction of loaded metal active sites and electrolyte acidic components is avoided; and the problem that the internal fibers of the carbon felt are difficult to uniformly load metal elementary substances or oxide particles due to high surface tension between the metal salt solution and the carbon felt is solved, efficient and uniform loading of the copper elementary substances on the carbon felt is realized, and the negative electrode performance of the zinc-bromine flow battery is remarkably improved.

The invention discloses a preparation method of high-density aluminum oxide ceramic and the high-density aluminum oxide ceramic, and the preparation method comprises the following steps: adding a silane coupling agent ethanol solution into alpha-Al2O3 powder for modification treatment to obtain modified powder; the modified powder is subjected to doping treatment, doped powder is obtained, and the mass percent of the modified powder in the doped powder is larger than 97.5%; the method comprises the following steps: filling doped powder in a preset range of a key area of a graphite mold, filling pure modified powder on the outer layer of the doped powder, and wrapping carbon felt after pre-pressing and compacting to obtain a pre-pressed sample; the pre-pressed sample is put into a rapid hot-pressing sintering furnace, O2 / Ar mixed atmosphere is introduced, the temperature is gradually increased to a first sintering temperature, and meanwhile, the pressure applied to the mold is gradually increased to the sintering pressure according to the temperature increasing progress; keeping the temperature for a period of time at the first sintering temperature and the sintering pressure; after heat preservation is finished, the sintering pressure is kept, the temperature is reduced to a second sintering temperature, natural cooling is conducted to the room temperature, and the target high-density aluminum oxide ceramic is obtained.

The invention relates to the field of all-vanadium redox flow batteries, in particular to a sulfurized polyacrylonitrile-based electrode, a preparation method thereof and application of the sulfurized polyacrylonitrile-based electrode as an all-vanadium redox flow battery negative electrode material. The invention provides a negative electrode of an all-vanadium redox flow battery, which takes a carbon felt electrode as a matrix and is loaded with sulfurized polyacrylonitrile. The sulfurized polyacrylonitrile is used as a negative electrode catalytic material for the all-vanadium redox flow battery, so that the electrocatalytic activity of a negative electrode reaction can be improved, the reaction kinetics is accelerated, and the battery performance is improved. Meanwhile, the sulfurized polyacrylonitrile and the negative electrode matrix carbon felt have the same molecular skeleton, so that the sulfurized polyacrylonitrile can grow on the surface of the carbon felt in situ, the adhesive force of the catalyst sulfurized polyacrylonitrile and the carbon felt is improved, and the cycling stability of the all-vanadium redox flow battery is further improved. In addition, the power density of the all-vanadium redox flow battery under high current density can be improved by using the sulfurized polyacrylonitrile as the negative electrode catalyst.

The invention discloses a platinum-based high-entropy alloy self-supporting catalyst as well as a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: S1, dissolving a platinum source, an iron source, a cobalt source, a molybdenum source and a manganese source in a solvent according to the molar ratio of platinum to iron to molybdenum to cobalt to manganese being 1: 1: 1: 1: 1 to obtain a precursor solution; s2, dipping the carbon felt in a polyvinyl alcohol solution, and drying to obtain a substrate; and S3, dipping the substrate in the precursor solution, drying, and carrying out Joule heat flash evaporation to obtain the catalyst. According to the invention, five metals are added according to an equal molar ratio, the catalytic efficiency of the water electrolysis catalyst is improved by utilizing a high-entropy effect, the production cost of the catalyst is reduced, meanwhile, the long-time stability of the catalyst is improved by adding a self-supporting material, and an efficient and stable water electrolysis process in an acidic electrolysis environment is realized.

This invention relates to the field of electrochemical technology, and particularly to a single-atom nickel-modified electrode material, its preparation method, and a reactor. An embodiment of this invention provides a method for preparing a single-atom nickel-modified electrode material, comprising: S1, subjecting a carbon felt to a surface hydrophilic treatment to obtain a hydrophilic carbon felt; S2, immersing the hydrophilic carbon felt in a first solution containing Ni ions, and adding a second solution containing organic matter, allowing for a complete reaction, and then growing a nickel-containing metal-organic framework material in situ on the hydrophilic carbon felt; S3, calcining the hydrophilic carbon felt containing the nickel-containing metal-organic framework material to obtain the single-atom nickel-modified electrode material. This invention provides a single-atom nickel-modified electrode material, its preparation method, and a reactor, which can provide a cathode material that combines efficient microbial colonization with interfacial stability.

The invention discloses a high-concentration sulfate acid pit water treatment method based on an acid-resistant SRB biological cathode, which comprises the following steps: enabling acid pit water to pass through a grid and then enter a regulating reservoir; introducing the wastewater in the regulating tank into a biological membrane electrochemical device for electrochemical reaction; oxidizing Fe < 2 + > in the wastewater into Fe < 3 + > on a titanium-based IrO2 anode plate and releasing electrons in an anode chamber; in the cathode chamber, an acid-resistant SRB bacterial film loaded on the surface of the carbon felt electrode reduces SO4 < 2-> into S < 2-> by utilizing transferred electrons; cO2 microbubbles are introduced into the liquid in the cathode chamber to react with S < 2-> to generate sulfur precipitates, and the reacted mixed liquid enters a cyclone separator to realize gas-solid separation; and carrying out hydrolysis reaction on Fe < 3 + > in the effluent of the anode chamber to generate Fe (OH) 3 precipitate, mixing the Fe (OH) 3 precipitate with sodium silicate, and calcining to convert the mixture into magnetic alpha-Fe2O3. The method can effectively remove SO4 < 2-> and recover iron sludge.

The application discloses a method for removing heavy metal complexes in high-salinity wastewater and recovering heavy metals step by step in cooperation with E-UV, and belongs to the technical field of wastewater treatment. The method adopts a series connection type two-stage reactor: the first stage is a pure electrochemical unit (DSA anode + carbon felt cathode), which is used for breaking the complex of easily degradable heavy metal complexes and depositing and recovering the first target metal; the second stage is an electrochemical-ultraviolet cooperative unit (DSA anode, carbon felt cathode and ultraviolet lamp are arranged in the same chamber), which is used for breaking the complex of difficult-to-degrade complexes by ultraviolet activation and strengthening free radicals and recovering the second target metal. High-salinity wastewater containing heavy metal complexes flows through the two-stage reactor in sequence, and selective heavy metal complex breaking and step-by-step recovery are realized by adjusting and controlling the on-off time of the ultraviolet lamp. The application breaks through the bottleneck of high-salinity system treatment, and when a double complex system is simultaneously treated, the metal recovery rate is greater than or equal to 95%, the TOC removal rate is greater than 90%, and no chemical reagent needs to be added, so that the application has high efficiency and environmental protection.

The application discloses a high-concentration sulfate radical acid mine water treatment method based on acid-resistant SRB biological cathode, which comprises the following steps: after the acid mine water is filtered through a grid, the acid mine water is fed into an adjusting tank; the wastewater in the adjusting tank is fed into a biological membrane electrochemical device to perform an electrochemical reaction; in an anode chamber, Fe 2+ in the wastewater is oxidized into Fe 3+ and releases electrons; in a cathode chamber, the acid-resistant SRB bacterial membrane loaded on the surface of a carbon felt electrode utilizes the transmitted electrons to reduce SO4 2‑ into S 2‑ ; CO2 micro-bubbles are fed into the liquid in the cathode chamber to react with S 2‑ to generate sulfur precipitate, and the mixed solution after the reaction is fed into a cyclone separator to realize gas-solid separation; Fe 3+ in the water in the anode chamber generates Fe(OH)3 precipitate through a hydrolysis reaction, the Fe(OH)3 precipitate is mixed with sodium silicate, and is calcined to be converted into alpha-Fe2O3 with magnetism. The method can effectively remove SO4 2‑ and recover iron mud.

The invention discloses an all-vanadium redox flow battery electrode and a modification method thereof, and the modification method comprises the following steps: dipping a carbon-based material in a treating agent aqueous solution, the treating agent being one or more of ammonium sulfate, ammonium bisulfate and ammonium persulfate; and carrying out drying treatment and pyrolysis treatment on the impregnated carbon-based material to obtain the all-vanadium redox flow battery electrode. According to the method, ammonium sulfate, ammonium bisulfate or ammonium persulfate is decomposed into NH3, H2O and SO3, H2SO4 is generated from SO3 and H2O, the surface of the carbon felt is subjected to mild etching, the pore structure of the surface of the carbon felt is increased, the reaction activity specific surface is improved, meanwhile, sulfur and nitrogen atoms are embedded into a carbon skeleton to form a doped structure, sulfur and nitrogen are introduced through the double-doping effect, and the catalytic activity of the oxidation-reduction reaction of vanadium ions (VO2 + / VO2 + and V2 + / V3 +) is enhanced. The modification method provided by the invention is simple and environment-friendly in process, avoids discharge of strong acid waste liquid, does not need a cleaning step, and meets green production requirements.

The application discloses a method for preparing oxide eutectic ceramics by using an ultrafast high-temperature furnace. Raw material powders are proportioned according to eutectic composition, and then are sequentially subjected to ball milling, drying, sieving and compression molding; the green body is placed in a thin-wall graphite crucible and is put into a heating carbon felt element sandwich hole; the temperature is rapidly increased to a set temperature by using ultrafast heating, and the temperature is kept for a very short time, and then the oxide eutectic ceramics are obtained after cooling. The oxide eutectic ceramics are rapidly formed by using ultrafast heating and Joule heat radiation heating at a furnace temperature far below the eutectic temperature, and the microstructure of the eutectic ceramics can be controlled by adjusting the temperature parameters. The eutectic structure obtained is fine in size and excellent in mechanical properties; and the problems of long time consumption, high cost and complex block material preparation process in the existing oxide eutectic ceramic preparation method are solved.

The invention relates to an in-situ integrated Joule hot membrane structure for an MABR (Membrane Aerated Baffled Reactor) and an application of a bioreactor for treating low-temperature wastewater, belonging to the field of low-temperature wastewater treatment. The membrane structure comprises a biological carrier layer and a Joule heating layer; the biological carrier layer is made of one or more of silicone rubber, polyvinylidene fluoride, polyether sulfone, polyethylene and polypropylene; the surface of the biological carrier layer is required to be high in oxygen permeability, and the thickness of the biological carrier layer is 100-300 microns; the Joule heating layer is made of one of carbon felt, graphite felt or graphene heating sheets; the void ratio of the Joule heating layer is 70%-90%, and the surface aperture distribution is 10-100 [mu] m. Current is applied to the membrane structure, and heat is generated through the Joule heating effect of the membrane structure. The heat achieves the function in a heat conduction mode, and through heat conduction of the substrate, a stable and appropriate growth temperature environment is maintained for the biological membrane attached to the substrate. The synchronous thermal management strategy ensures that the biological membrane keeps high metabolic activity, so that efficient biodegradation of pollutants in the low-temperature wastewater is realized.

The novel charging structure comprises a furnace bottom and furnace walls on the two sides, a layer of furnace bottom carbon black is laid on the furnace bottom of the graphitization furnace, and a furnace core area is installed in the center of the furnace bottom carbon black. A layer of graphite felt, a layer of carbon felt and a layer of aluminum silicate are sequentially filled on the furnace bottom carbon black and between the two sides of the furnace core area and the furnace walls on the two sides from inside to outside, a heat preservation wall is formed by the layer of graphite felt, the layer of carbon felt and the layer of aluminum silicate, and a resistance material and an upper heat preservation material are sequentially laid above the furnace core area and the heat preservation wall from bottom to top. Vent holes are formed in the upper portion of the furnace core area. The aluminum silicate, the carbon felt and the graphite felt are sequentially adopted in the area from the furnace wall to the furnace core to replace side face heat preservation material powder, the graphite felt is close to the crucible wall or the box plate wall, the heat insulation performance is good, the graphite felt is resistant to high temperature, the aluminum silicate is close to the furnace wall, the carbon felt is arranged between the aluminum silicate and the graphite felt, and the aluminum silicate, the carbon felt and the graphite felt jointly form a heat preservation wall. And a heat preservation effect is achieved on the graphitization furnace.

The invention discloses a preparation method of a nitrogen-sulfur co-doped modified layered double-oxide material, and belongs to the technical field of water treatment.The preparation method comprises the following steps that 1, a carbon felt substrate is pretreated and dried, the treated substrate is placed in a uniform solution containing Fe (NO3) 3.9 H2O and Ni (NO3) 2.6 H2O to be subjected to a hydrothermal reaction, and after the hydrothermal reaction is completed, the substrate is taken out and dried; carrying out ultrasonic treatment and washing with deionized water to obtain a NiFe-LDH precursor; and (2) drying the obtained precursor, dipping the dried precursor in an ethanol solution of ammonium persulfate, and then carrying out high-temperature carbonization treatment in an inert gas atmosphere to prepare the nitrogen-sulfur co-doped modified nickel-iron layered double-oxide material. The difference of nitrogen and sulfur in atomic radius, electronegativity and doping form enables the co-doped structure to effectively regulate and control the electronic structure of the material: nitrogen doping improves conductivity, and sulfur doping promotes exposure and stability of active sites. The co-doping synergistically optimizes the electronic structure and catalytic activity of the material, so that the material has excellent capacitive deionization removal performance and electrocatalytic activity at the same time.

The invention discloses a bipolar composite hydrogel self-powered black and odorous water body monitoring device and a preparation method, the bipolar composite hydrogel self-powered black and odorous water body monitoring device comprises a floating body and a bipolar composite hydrogel energy supply device, a wireless transmission module antenna and a miniature weather station are installed above the floating body, and a water quality sensor and a counterweight device are installed below the floating body. The bipolar composite hydrogel energy supply device comprises a first side hydrogel layer and a second side hydrogel layer, the first side hydrogel layer is a polyvinyl alcohol-sodium alginate composite hydrogel substrate loaded with oscillatoria palustris cell suspension and LiCl, and the first side hydrogel layer is tightly connected with a carbon felt; the second side hydrogel layer is formed by loading shewanella suspension and activated carbon on a polyvinyl alcohol-sodium alginate composite hydrogel substrate, embedding a carbon felt electrode, and connecting the carbon felt and the carbon felt electrode to an integrated circuit through wires. According to the black and odorous water body monitoring device, bipolar cooperative power generation is achieved, and the energy supply stability and efficiency are improved; monitoring and water body remediation are synchronously realized; the material adaptability is excellent, and the service life of the device is prolonged; the environment friendliness is high, and the risk of secondary pollution is avoided.

The application discloses an artificial wetland-bioelectric Fenton coupling system, which comprises, from bottom to top, a gravel layer, a biological anode carbon felt, a wetland layer and a floating electric Fenton cathode; the biological anode carbon felt is buried in the gravel layer and the wetland layer; the floating electric Fenton cathode floats on the water surface of the wetland layer; the floating electric Fenton cathode comprises an air diffusion waterproof layer and a heterogeneous Fenton catalytic layer; the floating electric Fenton cathode floats up and down with the liquid surface, has a strong oxygen enrichment function, can cancel the aeration of a traditional Fenton reaction, simultaneously needs no additional iron salt catalyst for efficient catalytic oxidation, and increases the pH range of the Fenton reaction. The application combines the artificial wetland and the bioelectric Fenton system, utilizes the interception of the artificial wetland to easily degradable organic pollutants, provides sufficient electric energy for the electric Fenton process through the bioelectrochemical method, reduces the competition of easily degradable organic matters and PPCPs to hydroxyl radicals in the electric Fenton process, and improves the degradation efficiency of the PPCPs.

The application discloses a vertical balance hoisting carbon felt cylinder hanger and a method for realizing balance hoisting, wherein the hanger comprises a frame body assembly, a lifting assembly arranged on the upper portion of the frame body assembly and a self-balancing hanging foot assembly arranged on the lower portion of the frame body assembly; during hoisting, the carbon felt cylinder is first hooked by the self-balancing hanging foot assembly at the bottom, and then is lifted upward by the lifting assembly. The method has the advantages that: 1. the carbon felt cylinder can be conveniently hooked and lifted during operation, and the labor intensity of the operator is reduced and the work efficiency of the operator is improved; 2. the force bearing position of the carbon felt cylinder is ensured not to be damaged.

The invention belongs to the technical field of flexible piezoelectric sensors, and relates to a carbon felt-hydrogel composite piezoelectric sensor and a preparation method thereof. The sensor comprises a piezoelectric sensing layer, a cross-scale dual-network hydrogel layer, an electrode layer, a leading-out wire and a packaging layer, the two cross-scale dual-network hydrogel layers are arranged on the upper side and the lower side of the piezoelectric sensing layer in a stacked mode to form a sandwich structure. The cross-scale dual-network hydrogel layer is an elastic hydrogel material formed by compounding a carbon fiber felt skeleton and a molecular-level network polymer, and the molecular-level network polymer penetrates through the interior and the surface of the carbon fiber felt skeleton and is formed by cross-linking and curing; the number of the electrode layers is two, and the two electrode layers are arranged on the outer sides of the two cross-scale dual-network hydrogel layers in a stacked mode respectively. The lead-out wire is electrically connected with the electrode layer; the packaging layer wraps the outer side of the electrode layer. According to the sensor, the mechanical property, the conductivity and the stability of the flexible piezoelectric sensor can be improved.

The invention relates to the technical field of sewage treatment, and discloses a sewage treatment system and method for photocatalytic coupling biological treatment.The sewage treatment system for photocatalytic coupling biological treatment.The sewage treatment system for photocatalytic coupling biological treatment.The sewage treatment system for photocatalytic coupling biological treatmentcomprises a pretreatment unit, a photocatalytic unit, an electrochemical biological unit, a post-treatment unit and an intelligent control unit, the pretreatment unit comprises a microwave-ozone coupling reactor and a magnetic adsorption column; the photocatalysis unit comprises a dual-band reaction tower; the electrochemical biological unit comprises a three-dimensional electrode biological membrane assembly and a FeS2 filler layer, the anode of the three-dimensional electrode biological membrane assembly is boron-doped diamond, and the cathode of the three-dimensional electrode biological membrane assembly is a carbon felt of anaerobic ammonium oxidation bacteria. Through multi-stage cooperative treatment, heavy metal ions and organic matters in the sewage are effectively removed, the removal rate of the heavy metal Cr (VI) is greater than 99.9%, the removal rate of the refractory organic matter benzene is greater than 99.9%, and the method has multi-scene applicability and efficient treatment capacity.

The invention provides a preparation method and application of a non-noble metal carbon felt composite electrode applied to high-salinity wastewater, a nickel-iron bimetallic active component is loaded on a carbon felt substrate through a one-step hydrothermal method, and then the nickel-iron bimetallic active component is treated with sodium hydroxide for 1 h to prepare the electrode. And when being applied to degradation of rhodamine B-containing wastewater under strong alkali and high salt conditions, the rhodamine B-containing wastewater degradation catalyst shows good catalytic performance, stability and salt resistance. According to the electrochemical composite electrode material provided by the invention, the carbon felt is used as an electrode substrate, and the carbon felt is combined with the non-noble metal nickel-iron bimetallic active component loaded on the carbon felt, so that the cost is relatively low, and the electrochemical composite electrode material is green and efficient. And the loading of bimetallic components on the substrate can be completed by a one-step hydrothermal method, the operation process is convenient, the three-dimensional porous structure of the carbon felt substrate provides a rich specific surface area, and the catalytic performance and the stability are effectively improved by loading a large amount of nickel-iron bimetallic active sites inside and outside the substrate.

The invention discloses a blue-green algae carbon quantum dot modified gas diffusion electrode as well as a preparation method and application thereof, and belongs to the technical field of environmental engineering. The preparation method comprises the following steps: preparing nitrogen auto-doped cyanobacteria carbon quantum dots (BGA-CQDs) as an electrode modification material by taking nitrogen-rich cyanobacteria as a precursor through a hydrothermal method, and further mixing the cyanobacteria carbon quantum dots with carbon black, polytetrafluoroethylene (PTFE) and absolute ethyl alcohol to prepare uniform catalyst slurry; the blue-green algae carbon quantum dot modified gas diffusion electrode (CQDs-GDE) is prepared by coating a pretreated carbon felt base material with the blue-green algae carbon quantum dot modified gas diffusion electrode (CQDs-GDE), and after the blue-green algae carbon quantum dot modified gas diffusion electrode (CQDs-GDE) is applied to an electro-Fenton system, TCPP in a water body can be efficiently degraded.

The invention discloses an electrochemical synthesis method of alpha-nitroketone compounds, which comprises the following steps: adding olefin, ferric nitrate, tetraethylammonium chloride and acetonitrile into a reaction container, carrying out electrolysis in air at room temperature by taking a carbon felt as an anode and stainless steel as a cathode, carrying out TLC (Thin Layer Chromatography) monitoring by using a constant current of 2 mA until the olefin is completely consumed, and after the reaction is finished, carrying out electrochemical synthesis on the alpha-nitroketone compounds to obtain the alpha-nitroketone compounds. And washing the reaction mixture with water, extracting with ethyl acetate, combining organic layers, drying with anhydrous sodium sulfate, concentrating, and finally separating and purifying through silica gel rapid column chromatography to obtain the target product alpha-nitroketone compound. The synthesis method disclosed by the invention does not need a condensing agent and nitromethane, is green and environment-friendly, mild in condition, wide in olefin range and good in functional group tolerance, and has the advantages of low cost, good compatibility, convenience in amplification synthesis and the like.

The application discloses a zinc-bromine single liquid flow battery and belongs to the technical field of liquid flow battery energy storage, wherein the zinc-bromine single liquid flow battery is a single battery or a battery pack formed by connecting two or more single batteries in series, and the single battery mainly comprises a negative electrode frame, a negative carbon felt electrode arranged in a through hole in the middle of the negative electrode frame, a diaphragm, a positive carbon felt electrode arranged in a through hole in the middle of a positive electrode frame and the positive electrode frame which are sequentially stacked. The application reduces the flow radius of the electrolyte inlet flow channel, the inlet distribution flow channel, the outlet flow channel and the outlet distribution flow channel of the positive electrode frame, increases the flow resistance of the positive electrode frame, and solves the problems of low coulomb efficiency and short cycle life of the zinc-bromine single liquid flow battery caused by the expansion of the positive bromine during the operation of the zinc-bromine single liquid flow battery.

The invention relates to the field of liquid flow electric pile production, and discloses a full-automatic liquid flow electric pile stacking production line which comprises a jig, a sheet stacking station, a sub-stacking station, a pre-assembling station, a screw penetrating station, a pile pressing station and a discharging station. The sheet stacking station comprises eight sheet feeding mechanisms and a second bipolar plate feeding mechanism which are sequentially distributed, the eight sheet feeding mechanisms are used for stacking a large plate frame, a first carbon felt, a proton membrane, a small plate frame, a second carbon felt, a first sealing ring, a first bipolar plate and a second sealing ring respectively, and the sub-stacking station comprises a sub-stacking mechanism; the screw penetrating station comprises a screw penetrating mechanism; the pre-assembly station comprises a transverse conveying line, a longitudinal conveying line and a first manipulator; the pressing and stacking station comprises a pressing and stacking mechanism; the discharging station comprises a discharging mechanical arm and a turnover machine. The robot is divided into a plurality of simple function modules, a single module can operate independently and is not affected by other modules, and the robot has the advantages of being high in stability and low in loss rate of quick-wear parts such as manipulators.

The utility model discloses a photovoltaic electricity reinforced horizontal flow constructed wetland reactor which comprises a reactor main body, a water inlet and a water outlet are respectively formed in the top ends of two opposite sides of the reactor main body, a lower gravel layer, a carbon felt layer, an upper gravel layer and a surface water body are sequentially arranged in the reactor main body from bottom to top, and plants are planted on the carbon felt layer; the division module comprises a division plate and a plurality of baffles, the interior of the reactor main body is divided into an anaerobic zone and an aerobic zone by the division plate, two groups of baffles are fixed in the anaerobic zone, and a group of baffles are fixed in the aerobic zone; the electrical stimulation system is mounted on the plant in the aerobic zone, and the bottom of the electrical stimulation system is in contact with the carbon felt layer; the aeration system is mounted at the bottom of the aerobic zone; and the photovoltaic power supply system is connected with the electrical stimulation system and the aeration system. According to the utility model, sewage is deeply treated on the premise of saving energy and utilizing waste, so that the sewage treatment effect is improved.