250results about How to "Many reactive sites" patented technology

The invention discloses a porous YSZ (Yttria Stabilization Zirconia) substrate-based mixed potential type NO2 sensor with a high-efficiency three-phase boundary and a preparation method thereof, belonging to the technical field of gas sensors. The sensor sequentially consists of an Al2O3 ceramic plate provided with a Pt heating electrode, the porous YSZ substrate of which one side is provided with a pore-forming surface, a Pt reference electrode and an NiO sensitive electrode, wherein the reference electrode and the sensitive electrode are both of strip-shaped structures and are symmetrically arranged close to the edge on the pore-forming surface of the porous YSZ substrate; the porous YSZ substrate is prepared by steps of blade-coating of a layer of a YSZ sizing agent added with pore forming agents on the YSZ substrate, low-temperature degreasing and high-temperature sintering, and is of a double-layer structure of which the surface is rough and porous. The pore forming agents have three types, including PMMA (Polymethyl Methacrylate), graphite and starch, and the doping ratios of the three types of pore forming agents are all 5% to 15%. By increasing the reaction area and active sites of the three-phase boundary of the mixed potential type NO2 sensor, the sensitivity of the sensor is improved.

The invention relates to a ferrum-cerium-titanium composite oxide catalyst. A chemical formula of the catalyst is FeCeaTiOx, wherein a is greater than 0 but less than or equal to 1.6. The invention further discloses a preparation method of the catalyst. The method comprises the following steps of (1) preparing and uniformly mixing an Fe source solution, a Ce source solution, and a Ti source solution to obtain a mixed solution, and (2) adding excessive urea precipitant in the mixed solution, precipitating Fe, Ce and Ti ions, conducting suction filtration on an obtained precipitation product, washing, drying, roasting, and obtaining the ferrum-cerium-titanium composite oxide catalyst. The low-temperature activity of the catalyst is improved obviously, the preparation method is simple and practicable, and the catalyst is used for a purification process of selective catalyctic reduction of nitric oxide (NH3-SCR).

The invention discloses a preparing method of porous monocrystal IT MoS2 nanosheet. The method comprises the steps of 1, preparing 2H crystal form MoS2 nanosheet using hydrothermal method; 2, conducting stripping of multi-layered 2H crystal form MoS2 nanosheet with ultrasonic wave and assisting with a lithium-ion intercalation method. The 1T MoS2 nanosheet can be directly used for electro-catalysis hydrogen production, and compared with MoS2 with other structures, electro-catalysis hydrogen production property can get fast improvement, porous structure provides more edges for the catalysis, therefore can expose more active sites, which is beneficial to electro-catalysis hydrogen production; single-layered structure enables larger specific surface area of the catalyst, can provide more reaction active sites. Compared with a multi-layered structure, a single-layered structure reduces electric transmission resistance between layer and layer, is beneficial to transmission and transfer of electricity, thus accelerating velocity of electro-catalysis hydrogen production.

The invention discloses a modified graphite phase carbon nitride photocatalyst as well as a preparation method and application thereof. The modified graphite phase carbon nitride photocatalyst is prepared from urea and salicylic acid serving as raw materials by virtue of calcination, wherein a mass ratio of urea to salicylic acid is 1:(0.002-0.02). The modified graphite phase carbon nitride photocatalyst disclosed by the invention has the advantages of being high in specific surface area, wide in light absorption range, low in electron-hole pair recombination rate, excellent in photocatalyticperformance and the like, and has multiple reactive sites, excellent application value and application prospects. The preparation method has the advantages of being simple in process, wide in raw material source, low in cost, high in preparation efficiency, high in yield and the like, is suitable for large-scale preparation and is favorable for industrial production. The modified graphite phase carbon nitride photocatalyst disclosed by the invention can be used for degrading organic pollutants, has the advantages of being simple in process, convenient to operate, low in cost, high in treatmentefficiency, excellent in degradation effect and the like, and has excellent effects of degrading the various organic pollutants.

The invention discloses a preparation method of a hollow-structured electrode material of a lithium ion battery. The preparation method is characterized by comprising the steps of enabling a salt solution of one kind metal element in a target product to be reacted with a precipitator to form a precipitate with low degree of crystallinity; then adding salt solutions of other metal elements to form precipitates with low degree of crystallinity and coating the surface of the precipitate with low degree of crystallinity to form a core-shell structure; enabling the inner layer of the core-shell structure to be diffused to the outer layer gradually so as to form a hollow-structured precursor with uniformly distributed elements; and performing calcining on the precursor to obtain the hollow-structured positive electrode material or negative electrode material of the lithium ion battery. By virtue of the hollow structure of the prepared electrode material, electron transport and lithium ion diffusion can be facilitated, and volumetric strain in a charging-discharging process can be buffered; and meanwhile, the electrode material has relatively large specific surface area, so that the contact area between the active material and an electrolyte can be improved, and the material obtains excellent electrochemical performance.

The invention discloses preparation method and application of a cobalt-based sulfide nanosphere carbon fiber integrally comprising a core-shell structure. The preparation method comprises the steps offirstly, preparing cobalt precursor nanoparticle by taking cobalt nitrate hexahydrate as a cobalt source and glycerol-containing mixed alcohol as a solvent and by a solvothermal method; secondly, preparing polyproplylene (PAN)-coated cobalt precursor nanosphere by electrostatic spinning; and finally, preparing core-shell structure cobalt-based sulfide particle by high-temperature calcination andvulcanization, carbonizing an organic polymer to obtain the cobalt-based sulfide nanosphere carbon fiber integrally comprising the core-shell structure. By distribution of cobalt-based sulfide core-shell structure nanosphere in the carbon fiber, gradual and accurate control from a single sphere to multiple spheres can be achieved. The core-shell structure cobalt-based sulfide nanosphere carbon fiber is used as a lithium ion battery negative electrode material applied to a lithium ion battery, and the obtained lithium ion battery has favorable rate performance and excellent cycle stability.

The invention discloses a bioelectricity synthesis system and a method for synthesizing acetic acid and / or ethyl alcohol through the same. The bioelectricity synthesis system comprises a reactor, an online pH control system, an air supply system and a power source. The reactor is a three-chamber reactor and comprises an air chamber, a negative electrode chamber and a positive electrode chamber, wherein the air chamber is connected with the air supply system; the negative electrode chamber is externally connected with the online pH control system, the negative electrode chamber and the air chamber are partitioned by an air negative electrode, and the negative electrode chamber is further internally provided with a reference electrode; the positive electrode chamber is internally provided with a positive electrode, the positive electrode chamber and the negative electrode chamber are partitioned by a cation exchange membrane, and the positive electrode, the air negative electrode and the reference electrode are externally connected with the power source through wires. Positive electrode electrolyte is added into the positive electrode chamber, a bioelectricity synthetic nutrient solution obtained after sterile and anaerobic treatment is added into the negative electrode chamber, and electrosynthesis bacteria are inoculated into the negative electrode chamber; carbon dioxide is sent into the air chamber through metering of the air supply system, and carbon dioxide penetrates through the air negative electrode and is converted into acetic acid and / or ethyl alcohol in the negative electrode chamber.

The invention discloses a preparation method of a superhydrophobic and super-lipophilic oil-water separation mesh membrane based on tannic acid modification. The preparation method provided by the invention adopts natural polyphenol tannic acid, long-chain alkylamine to modify a surface of a mesh membrane material, simultaneously realizes 'micro-nano structure' and 'low surface energy' of the surface of the material, prepares the superhydrophobic and super-lipophilic oil-water separation mesh membrane, avoids an additional construction process of a surface microstructure, has advantages of easily available and source-extensive raw materials and simple preparation process; and the prepared superhydrophobic and super-lipophilic oil-water separation mesh membrane has relatively good selectivepermeation for oil substances, low treatment cost, simple operation, recyclability and usability for multiple times.

The invention discloses a CeO2-MoO3 / graphene low-temperature denitration catalyst and a preparation method. The CeO2-MoO3 / graphene low-temperature denitration catalyst comprises the following materials in percentage by weight: 5%-15% of cerium oxide, 5%-10% of molybdenum trioxide and the balance being graphene. The CeO2-MoO3 / graphene low-temperature denitration catalyst can keep good denitration performance at the temperature of about 200 DEG C, the reduction rate of NOx can be increased to 81%-88%, and simultaneously, the oxidation of SO2 is also inhibited.

The invention belongs to the technical field of preparation of nickel cobalt manganese acid lithium materials, and discloses a power-type nickel cobalt manganese acid lithium material as well as a preparation method and application of the material. The preparation method comprises the following steps: adding organic acid into a mixed water solution of a lithium source, a nickel source, a cobalt source and a manganese source, aging so as to obtain a sol precursor, carrying out electrostatic spinning so as to obtain gel fibers, and forging so as to obtain the power-type nickel cobalt manganese acid lithium material. The nickel cobalt manganese acid lithium material of a nano fiber structure is obtained by a sol gel-electrostatic spinning method, is homogeneous in structural size, effectively reduces the surface energy, and intensifies the capacity of a lithium ion; the nano fiber structure can reduce the diffusion impedance of a lithium ion in the embedding and removing process, so that the lithium ion is dispersed rapidly; meanwhile, the material superficial area is relatively large; more reaction activity sites exist, and the relatively high specific capacity can be provided; According to the method provided by the invention, the process is simple, electrostatic spinning can be realized without adding polymer reagents, not only can the using cost of a polymer be reduced, but also the impact to a nano structure caused by the polymer can be alleviated.

The invention discloses a method for synthesizing lamella g-C3N4 and TiO2 nanorod composite material through assistance of ultrasonic wave, relates to a preparation method of the g-C3N4 and TiO2 nanorod composite material for hydrogen generation through photolysis of water, and aims to solve the problem about difficulty in stripping the existing g-C3N4 with the graphene sheet like structure. The method comprises the following steps: I, preparing a TiO2 nanorod; II preparing g-C3N4 with the sheet structure; III, synthesizing the lamella g-C3N4 and TiO2 nanorod composite material through assistance of ultrasonic wave; IV, freeze-drying to obtain the required stripped g-C3N4 and TiO2 nanorod composite material. Compared with the prior art, the method is simple to operate, low in cost, and easy to realize commercialization; the prepared lamella g-C3N4 and TiO2 nanorod composite material is increased in surface reaction active sites and remarkably enlarged in specific surface area, and has excellent property for hydrogen generation through photolysis of water under simulated sunlight.

The invention discloses an exotic atom-doped carbon material and a preparation method and an application thereof. The doped carbon material prepared according to the method is a honeycomb three-dimensional multi-level porous structure material, wherein macropores are constructed by mutually cross-linked flakes, the flakes are stacked by nanoparticles, and random mesopores and micropores are distributed between the nanoparticles. The preparation method comprises the steps of firstly dissolving polyacrylonitrile into an N, N-dimethylformamide solution, then adding one or more reagents containingtarget doping atoms into the solution, conducting a solvothermal reaction to obtain a precursor, placing the precursor in a protective atmosphere for calcination so as to obtain a single or multi-atom doped carbon material with uniform nanometer size and excellent electrochemical performance. Sodium-ion batteries show high specific capacity, excellent rate performance and ultra-long cycle stability when the exotic atom-doped carbon material is used as a negative electrode material of the sodium-ion batteries.

The invention discloses a method for fixing a heparin multilayer film on the surface of TiO2. By the adoption of a self-assembly monomolecular layer method, an interface layer which forms chemical bonding respectively with the surface of TiO2 and biotin is prepared between the surface of TiO2 and the biotin so as to improve the stability of fixing the heparin multilayer film. Hexamethylendiamine is used as a coupling agent and reacts respectively with the carboxyl of heparin and the carboxyl of the biotin to form biotinylated heparin, therefore a recognition site of avidin is available. The TiO2 modified by the self-assembly monomolecular layer is coated with biotin azide and the biotin is fixedly fixed on the surface of the TiO2 by a photochemistry method. The recognition reaction of biotin-avidin is utilized for assembling and forming the heparin multilayer film. The method can be used for fixedly fixing the heparin multilayer on a TiO2 thin layer at the surface of titanium-base biometal materials and on the rear surface of a TiO2 film deposited on the surface of other materials, thereby ensuring that the surface thereof can have excellent anticoagulant function. Furthermore, the method has simple technology and easy realization.

The invention belongs to the field of electrochemical energy and particularly relates to a preparation method of a cathode material for a lithium-air battery and the lithium-air battery. A Co3O4@Ni nanowire array prepared by using a hydrothermal process has larger specific surface area; porous structures and ideal specific surfaces of nanowires are obtained by the low-temperature calcination process, and further the contact area between electrolyte and an electrode is increased, therefore, more reactive sites are provided for ORR and OER processes. The surfaces of the nanowires become rough after the nanowires are soaked; with the rough surfaces, the specific surface area of the nanowires is increased and a greater storage space is provided for discharge products. In addition, Co3O4 is reduced after the nanowires are soaked, oxygen vacancies and surface defects are increased and catalytic active sites are also increased, so that reversible formation and decomposition of a weak crystalline film-like discharge product on the surface of a catalyst are favorably promoted, therefore, the integral performance of the lithium-air battery is significantly improved.

The invention discloses a preparation method of a MoS2 nano-sheet coated KNbO3 nano-wire piezoelectric / photocatalytic material, belonging to the field of photocatalysis. The preparation method of a MoS2 nano-sheet coated KNbO3 nano-wire piezoelectric / photocatalytic material uses niobium powder (Nb), potassium hydroxide (KOH), sodium molybdate (Na2MoO4.2H2O) and thiourea (CN2H4S) as raw materials,and adopts a simple two-step hydrothermal method to prepare the KNbO3 / MoS2 heterostructure piezoelectric / photocatalytic material with good crystallinity. The two-step hydrothermal method is characterized in that KNbO3 nanowires are synthesized through a first hydrothermal reaction, and KNbO3 / MoS2 heterostructure piezoelectric / photocatalytic materials are synthesized through a second hydrothermal reaction. The preparation method provided by the invention is simple, and the experimental conditions are easy to control, and the piezoelectric / ferroelectric characteristics are innovatively utilized,and the photocatalytic performance is maximally optimized by promoting the separation of photo-generated electrons and holes. The significantly improved catalytic performance is due to the synergistic effect of heterostructures and the effect of mechanical vibration induced built-in electric fields to promote charge separation.

The invention discloses a supercapacitor-used nickel vanadate material preparation method, which comprises steps: 1, ammonium vanadate is dissolved in a solvent, nickel nitrate is added, and a reaction precursor solution is obtained; 2, a basic structure directing agent is used to adjust the pH value of the reaction precursor solution to 7 to 12, and by uniform mixing, a reaction mixed solution isobtained; and 3, the reaction mixed solution is transferred to an autoclave, reaction for 8 to 15 h under 100 to 180 DEG C is carried out, and a product nickel vanadate material is obtained. A one-step hydrothermal method is adopted, multiple alkaline reagents are used as structure directing agents, the nickel vanadate material is obtained through adjusting the pH, the operation is simple and safe, the cost is low, and the product purity is high. The invention also discloses a flower-like nickel vanadate material, the material presents a flower-like structure with lamellar layers, the specific surface area is large, the conductivity and the surface permeability are good, and multiple reactive sites exist. The invention also discloses application of the flower-like nickel vanadate materialas a supercapacitor electrode material, the specific capacitance is high, capacity retention and rate performance are good, and the electrochemical impedance is low.

The invention discloses a preparation method of a porous cobaltosic oxide nanosheet. By utilizing plant straws as a carbon source, so that the raw material source is wide, and the cost is low; the porous cobaltosic oxide nanosheet is prepared by virtue of an impregnation method and a secondary roasting method, the prepared porous cobaltosic oxide nanosheet is formed by Co3O4 nanocrystals with a good crystallization property, and the particle sizes of the Co3O4 nanocrystals are 5nm-20nm, so that the nanosheet has a relatively large specific surface area and rich pore structures. The porous cobaltosic oxide nanosheet has the advantages of high volume and long service life when being applied to supercapacitors.

The invention relates to an efficient Ni / Ni(OH)2 hydrogen evolution electrode, which is characterized in that nickel sulfate hexahydrate and nickel chloride are adopted as sources of nickel elements,and nickel and hydroxide nanoparticles thereof are uniformly doped into a catalyst layer through a direct-current electrodeposition method in combination with subsequent oxidation-reduction treatment,so that the efficient Ni / Ni(OH)2 hydrogen evolution electrode is prepared. The invention also relates to a preparation method of the high-efficiency Ni / Ni(OH)2 hydrogen evolution electrode, which comprises the following steps: (1) pretreating the conductive substrate; (2) carrying out DC electrodeposition to prepare a catalyst layer formed by stacking nano flaky nickel and hydroxide thereof; and(3) carrying out anodic oxidation treatment to obtain the Ni / Ni(OH)2 hydrogen evolution electrode. The Ni / Ni(OH)2 hydrogen evolution electrode is scientific and reasonable in design and has the advantages of being high in catalytic hydrogen evolution activity, low in cost, low in energy consumption, stable in use, good in electrical conductivity and the like. The invention provides the Ni / Ni(OH)2hydrogen evolution electrode and the preparation method thereof with relatively high innovativeness.

The invention provides a preparation method of a Bi2O2CO3 photocatalyst, the prepared Bi2O2CO3 photocatalyst and application. The preparation method comprises the following steps: (1) adding water into bismuth nitrate and urea, dropwise adding chloride solution, and stirring to form a bismuth precursor, wherein the molar dosage ratio of bismuth nitrate to urea is 1:(1-20); (2) regulating pH value of the bismuth precursor to be 5.0-6.5 by adopting alkaline solution, and forming a reactant; (3) carrying out reaction on the reactant for 24-30 hours at the temperature of 150-160 DEG C, so that precipitate is obtained; and (4) washing the precipitate obtained in the step (3), and drying, so that Bi2O2CO3 micro-nanosheet photocatalyst powder of a flake-like structure is obtained. The preparation method provided by the invention has the advantages that reagents used in the process are respectively a nontoxic and harmless green reagent without secondary pollution, and no pollution can be produced to the environment in a using process of the photocatalyst. The prepared Bi2O2CO3 photocatalyst has good photocatalytic activity, has high catalytic efficiency when being applied to wastewater degradation, also has good stability and is recyclable.

The invention provides a preparation method of a BiOCl photocatalyst, the prepared photocatalyst and application of the prepared photocatalyst. The method comprises the following steps: (1) adding bismuth nitrate and glucose into water, stirring evenly to obtain a mixed solution, wherein the molar ratio of the bismuth nitrate to the glucose is 1:(0.05-1); (2) dropwise adding a chloride solution into the mixed solution obtained in the step (1), stirring evenly to obtain a bismuth containing precursor solution; (3) using an alkaline solution to regulate the pH value of the bismuth containing precursor solution obtained in the step (2) to 5.0-6.5, stirring evenly to form a reactant; (4) enabling the reactant obtained in the step (3) to react for 24-30 hours at the temperature of 150-160 DEG C to obtain a precipitate; (5) washing and drying the precipitate obtained in the step (4) to obtain a BiOCl powder. The preparation cycle is short, the preparation method is simple, the natural product glucose is used to regulate the shape, the water is taken as the solvent, the whole process is nontoxic and harmless, no secondary pollutant is produced, and the preparation method has the characteristic of green synthesis.

The invention is applicable to the field of electrochemical energy sources, in particular to a preparation method for an amorphous carbon positive electrode of a lithium-air battery and the lithium-air battery. The preparation method comprises the following steps of growing a Co3O4 precursor on a foamed nickel substrate by hydrothermal reaction; performing calcination in air, and converting the Co3O4 precursor to Co3O4 to form a Co3O4@Ni amorphous carbon positive electrode; and immersing Ni-loaded Co3O4 in a RuCl3 solution, and performing high-temperature processing under the protection of argon to acquire a RuO2 / Co3O4@Ni amorphous carbon positive electrode. According to the preparation method for the amorphous carbon positive electrode of the lithium-air battery, provided by the invention, a Co3O4 nanowire is directly grown on the foamed nickel substrate by the hydrothermal process and low-temperature calcination, the conductivity of a transition metal oxide is improved by a RuO2 modified nanowire, and the prepared Co3O4@Ni nanowire array has relatively large specific area.

The invention relates to a preparation method of a nitrogen, phosphorus, and sulfur ternary co-doped ordered mesoporous carbon material and aims to solve the problem of limitation of existing single heteroatom doping on improvement of capacity of the mesoporous carbon material. The preparation method comprises the steps of preparing an ordered mesoporous silicon dioxide template (KIT-6); stirringand aging a sucrose, phosphoric acid and thiosemicarbazide mixed solution and a KIT-6 dispersion liquid for 10-14 hours under 40-60 DEG C; placing the obtained paste compound in a drying oven for drying for 10-14 hours under 70-90 DEG C; placing the product in a tubular furnace for pyrolysis for 1-3 hours under high-pure nitrogen (the nitrogen flowing rate is 50mL / s) at 700-900 DEG C, wherein theheating rate is 2 DEG C per minute; and immersing the carbonized composite material in an HF solution, performing stirring to remove the silicon dioxide template, performing filtering, washing with ultrapure water and ethyl alcohol, and obtaining the nitrogen, phosphorus, and sulfur ternary co-doped ordered mesoporous carbon material (NPS-OMC) after drying. The nitrogen, phosphorus, and sulfur ternary co-doped ordered mesoporous carbon material is prepared by the template and by nanometer pouring, and the specific capacity of the material electrode can reach 343F / g.

The invention discloses a preparation method of a MoSe2 nanosheet coated KNbO3 nanowire heterostructure photocatalytic material, and belongs to the field of photocatalysis. According to the invention,niobium powder (Nb), potassium hydroxide (KOH), sodium molybdate (Na2MoO4.2H2O) and selenium powder (Se) are used as raw materials, and a KNbO3 / MoSe2 heterostructure photocatalytic material with goodcrystallinity is prepared through a simple hydrothermal method and a solvothermal method. The hydrothermal method is used for synthesizing KNbO3 nanowires, and the solvothermal method is used for synthesizing the KNbO3 / MoSe2 heterostructure photocatalytic material. The preparation method is simple, the experimental conditions are easy to control, and the KNbO3 / MoSe2 heterostructure photocatalyticmaterial is synthesized for the first time. The significantly improved photocatalytic performance is due to the synergistic effect of the heterostructure and the effect of promotion of charge separation by the built-in electric field generated by the spontaneous polarization of a ferroelectric.

The invention discloses a paper additive and a preparation method. During preparation, the paper additive comprises raw materials in parts by weight as follows: 0.6-6 parts of an antibacterial agent, namely, polyhexamethylene guanidine hydrochloride, 1-4 parts of carboxymethyl chitosan, 0.4-2 parts of a condensing agent, 0.1-0.5 parts of an activating agent and 0.05-0.2 parts of a cross-linking agent. The preparation method comprises steps as follows: the carboxymethyl chitosan is dissolved in water, then the pH value is adjusted to range from 5 to 5.5 with hydrochloric acid, the condensing agent and the activating agent are added to the mixture for activation, the antibacterial agent, namely, the polyhexamethylene guanidine hydrochloride, is added for a reaction, an obtained reaction liquid is subjected to suction-filtration, washing, drying and crushing and then evenly mixed with the cross-linking agent, namely, N,N-dimethyl bisacrylamide, an obtained mixture is dissolved in deionized water, and the paper additive is obtained. The paper additive has the advantages that the paper additive is broad in spectrum, high in efficiency, low in toxicity, free of drug resistance, high in antibacterial endurance and the like in the antibacterial aspect and has the advantages that the paper additive is capable of significantly enhancing the paper strength, non-toxic and harmless to human bodies and the like in the enhancing aspect.

The invention provides a copper nanowire loaded CoNi nanosheet electrocatalyst as well as a preparation method and application thereof, and belongs to the technical field of electrocatalysis. Foamy copper is used as a substrate material, copper hydroxide nanowires are generated through chemical oxidation reaction, then the copper nanowires are generated through electrochemical reduction, then CoNi nanosheets are loaded on the copper nanowires through electrochemical deposition, and the copper nanowire loaded CoNi nanosheet electrocatalyst is obtained. Foamy copper of a porous structure is used as a substrate material, after copper nanowires are generated on the surface of the foamy copper in situ, CoNi nanosheets are loaded, the surface area of the substrate is increased, good conductivity is kept, and meanwhile compared with a noble metal catalyst, Co and Ni transition metal catalysts are low in price, easy to prepare and excellent in performance.

The invention relates to a catalyst, a preparation method thereof and a method for removing nitrogen oxide and belongs to the field of catalysts. The catalyst comprises a modified material obtained by using transition metal to dope and modify a composite material, wherein the composite material comprises titanium dioxide and graphene oxide which are composited, and the transition metal comprises one or more of Mn, Fe, V, Cu, Cr and Co. The catalyst is cheap, capable of greatly lowering the activity temperature of SCR reaction and suitable for industrial application.

The invention relates to an electrode material for a supercapacitor and a preparation method and application of the electrode material. A wet chemical method is used for forming uniform copper hydroxide nanowires on the surface of foamy copper, then the copper hydroxide nanowires are used as a matrix and a copper source, and copper-doped nickel-cobalt bimetal sulfide is formed through a two-step hydrothermal method; the foamy copper is used as a rapid channel for electron transmission, so that the charge transmission rate of a current collector and an active material is improved, and the electrode material has relatively high charge transmission efficiency; the active material uniformly coats the copper hydroxide nanowire through the hydrothermal method, so that the mechanical stability ofthe electrode material is remarkably improved, and the cycle service life of the electrode material is remarkably prolonged.

The invention discloses a porous carbon nanosheet material, a preparation method thereof and application of the porous carbon nanosheet material serving as the negative electrode material of sodium-ion batteries. The preparation method includes: placing dopamine into a lithium chloride solution to perform polymerization reaction to obtain polydopamine-lithium chloride gel; subjecting the polydopamine-lithium chloride gel to high-temperature carbonization treatment to obtain a porous carbon nanosheet precursor; subjecting the porous carbon nanosheet precursor to argon plasma etching to obtain the porous carbon nanosheet material. The preparation method has the advantages that the method is simple, easy in raw material obtaining, good in repeatability and capable of achieving industrial production; the prepared porous carbon nanosheet material is large in specific surface area, rich in reaction active sites, moderate in interlayer spacing and the like; the porous carbon nanosheet material shows good battery performance hen being applied to the sodium-ion batteries.

The invention particularly relates to a microwave-synthesized oxygen vacancy BiOCl / Bi2O3 catalyst as well as a preparation method and application thereof, and belongs to the technical field of environmental engineering advanced oxidation, wherein the preparation method of the microwave-synthesized oxygen vacancy BiOCl / Bi2O3 catalyst comprises the steps: dissolving bismuth salt and chloride in alcohol to obtain a bismuth precursor solution; carrying out a first reaction on the bismuth precursor solution in a microwave environment under a stirring condition to obtain a BiOCl / Bi2O3 catalyst. TheBiOCl / Bi2O3 heterojunction catalyst containing a proper amount of oxygen vacancies, persulfate and other catalysts prepared by adopting the preparation method provided by the embodiment of the invention can generate a good degradation effect on refractory pollutants such as imidacloprid with complex structures under the irradiation of visible light.

The invention discloses a nano tubular NiCo2S4@titanium carbide composite material and a preparation method and application thereof. The nano material takes nickel chloride hexahydrate as a nickel source, takes cobalt chloride hexahydrate as a cobalt source, and employs a two-step hydrothermal method. The method comprises the steps: preparing a nano tubular precursor by a first hydrothermal method, wherein at the moment, the two materials are compounded together by the precursor; vulcanizing the precursor through secondary hydrothermal treatment, wherein the material compounds Ti3C2 of a single sheet layer with hollow tubular NiCo2S4 for the first time to prepare a NiCo2S4@titanium carbide composite material, and the NiCo2S4@titanium carbide composite material is applied to research of electrochemical performance of a supercapacitor, and loading modified Ti3C2 on a NiCo2S4 hollow tube to provide an additional electron transmission path, thereby improving the electron transmission efficiency. Experiments show that compared with a single electrode material, the NiCo2S4 and titanium carbide composite electrode material has more excellent specific capacitance and cycle performance.