214 results about "Redox" patented technology

The application discloses an automatic control method for oxidation flocculation parameters in mancozeb wastewater treatment, and belongs to the technical field of industrial wastewater treatment and automatic control. In view of the problem that the existing process relies on manual experience and the oxidation and flocculation stages are improperly connected, the multifunctional modified material containing dithiocarbamate salt groups, quinone groups and pre-complexed manganese and zinc ions is prepared first; the material and hydrogen peroxide are synchronously added in the acid oxidation stage, and the control system monitors the redox potential change rate in real time; when the redox potential reaches the preset threshold value and the characteristic change point with the first derivative of zero or the change from positive to negative appears and is maintained for the preset maintenance time, the system is automatically adjusted to be alkaline, the modified material triggers the net capture and chelation crosslinking reaction, and finally solid-liquid separation is carried out; the polymer skeleton is protected from indiscriminate attack of free radicals, the problem of drug antagonism is overcome, and the stable and up-to-standard effluent quality is realized.

This invention provides a method for preparing MXene-derived single-atom catalyst materials using ionic liquid-assisted synthesis. The method includes the following steps: (1) Synthesizing NBF-Ni-LDH / Mo2CT x The mixture consists of Ni(NO3)2·6H2O, urea, C6H8O7·H2O, 1-ethyl-3-methylimidazolium tetrafluoroborate, and Mo2CT. x Add to deionized water, mix well, heat, wash, and dry to obtain NBF-Ni-LDH / Mo2CT x (2) Synthesis of NBF-NiSe2 / Mo2CT x : NBF-Ni-LDH / Mo2CT x Sintering was performed in an Ar / H2 atmosphere to obtain the product NBF-NiSe2 / Mo2CT. x (3) Synthesis of Pt / NBF-NiSe2 / Mo2CT x : PtCl4 and NBF-NiSe2 / Mo2CT x The sample was placed in ethanol, stirred, dried, sintered, washed, and dried to obtain the single-atom catalyst material Pt / NBF-NiSe2 / Mo2CT. x The method of this invention is simple and controllable, and can effectively alleviate the "shuttle effect" of polysulfides in lithium-sulfur batteries, catalyze the conversion of polysulfides, promote the redox reaction kinetics of lithium-sulfur batteries during charge and discharge, thereby improving the discharge capacity of the battery and improving cycle stability.

This invention discloses a high-strength ceramsite and method for co-pressing high-alumina coal gangue and red mud, belonging to the field of industrial solid waste resource utilization technology. This invention uses high-alumina coal gangue and red mud as the sole solid raw materials, without adding any chemical additives. The high-alumina coal gangue is ground to 125 μm and then mixed with red mud at a mass ratio of 50:50. Water is added for wetting, and the mixture is molded under a pressure of 6 MPa. After drying, it is pre-fired at 450℃ for 20 min, then sintered at 1150℃ with a heating rate of 7℃ / min, held for 20 min, and cooled in the furnace to obtain the final product. This invention utilizes the fluxing effect of Na₂O and Fe₂O₃ in red mud to effectively overcome the problems of high sintering temperature and difficult liquid phase formation caused by the high Al₂O₃ content in high-alumina coal gangue. Through the synergistic redox effect of carbonaceous components in high-alumina coal gangue and Fe₂O₃ in red mud, the timing of liquid phase formation and gas release is matched, forming a composite dense structure of crystal framework-glass phase bonding. The resulting ceramsite has a compressive strength of 228 MPa, a 1-hour water absorption rate of 3.19%, and an apparent density of 2.68 g / cm³. 3 This opens up new avenues for the high-value utilization of high-alumina coal gangue.

The application relates to the field of electrochemical energy storage technology, and provides a composite positive electrode based on metal phthalocyanine and iodine synergic oxidation and reduction, a preparation method and a battery. The preparation method of the composite positive electrode based on metal phthalocyanine and iodine synergic oxidation and reduction comprises the following steps: mixing and grinding iodine monomer and a carbon carrier, sealing and heating, and preparing iodine monomer loaded carbon composite material; weighing the iodine monomer loaded carbon composite material, metal phthalocyanine, a conductive agent and a binder to prepare positive electrode slurry; coating the positive electrode slurry on the surface of a current collector, drying, and obtaining the composite positive electrode. The application constructs a metal center of metal phthalocyanine and an iodine double oxidation and reduction synergic positive electrode. The preparation method of the application further introduces metal phthalocyanine into the iodine monomer loaded carbon composite material, so that the iodine species and the metal center of the metal phthalocyanine jointly serve as a positive electrode oxidation and reduction reaction unit. The iodine species participates in I ‑ / I 0 / I + multi-electron conversion, the metal center of the metal phthalocyanine participates in the valence change reaction, and the two jointly constitute a double oxidation and reduction system.

The present application provides a narrow molecular weight distribution PVP copolymer, and a preparation method therefor and a use thereof. The PVP copolymer has the structure represented by formula I. In the present application, NVP monomer and allyl polyoxyethylene ether are subjected to a copolymerization reaction in a redox system, and a sulfonating agent is then added to the resulting copolymer reaction solution to perform sulfonation treatment of the terminal hydroxyl groups, thereby obtaining the PVP copolymer. The present application utilizes the chain transfer effect of allyl polyether to achieve effective control of the molecular weight distribution of the PVP copolymer, and performs strongly polar ionized end-group treatment to improve the segment uniformity of the PVP copolymer. The spatial steric hindrance of the polyether side chains and the charge repulsion of the ionic groups significantly improve the adequacy of chain extension of PVP in the casting solution, so as to increase the exchange rate of the casting solvent and precipitant, and obtain a membrane pore structure with uniform pore size, high porosity, and stable structure.

The application discloses a preparation method of a metal oxide passivation film on a gallium nitride surface; the method comprises the following steps: mixing a metal nitrate precursor solution and a hole sacrificial agent to obtain a mixed solution; placing a substrate containing a GaN layer into the mixed solution and performing photochemical deposition under ultraviolet light to obtain a metal oxide passivation film formed on the surface of the GaN layer. The preparation method uses a metal nitrate as a precursor, and under ultraviolet light, photo-generated electrons and holes of the GaN are used to initiate a redox reaction at a solid / liquid interface to form a uniform and dense metal oxide passivation film. The method is simple in process, is performed at room temperature, does not need vacuum, has small interface damage, can be used to reduce the trap state density of the GaN surface, improve the interface stability and reliability of a device, and is suitable for surface / interface passivation treatment of power electronic and ultraviolet photoelectric devices.

The application discloses a conjugated polymer of chlorobenzene, o-dichlorobenzene or m-dichlorobenzene and EDOT as well as a preparation method and application thereof, and belongs to the field of polymer electrochromic materials. By introducing chlorine atoms as intermediates in different active sites of benzene and EDOT as a strong electron-donating group, the obtained conjugated polymer has the characteristics of a wider redox peak, good optical contrast, fast response time, high coloring efficiency, good stability and the like.

A method of bonding first and second substrates to each other the substrates having respective bonding surfaces to be bonded together, comprising:(a) applying to the bonding surface of at least the first substrate a redox-active metal catalyst primer to form a primed surface;(b) activating the primed bonding surface of the first substrate by exposing the primed bonding surface to actinic radiation;(c) applying, to the so activated bonding surface of the first substrate, and / or or to the bonding surface of the second substrate, a UV curable anaerobic adhesive;(d) mating the bonding surfaces together with the UV curable anaerobic adhesive therebetween; and(e) exposing the UV curable anaerobic adhesive between the mated surfaces to actinic UV radiation. The method is particularly suited for obtaining bonds with good tensile shear strength with electrical substrates coated with an insulating varnish.

This application discloses a self-cleaning electrolysis module and electrolysis equipment. The self-cleaning electrolysis module includes a shell and an electrolysis space within the shell. The electrolysis space is divided into a first chamber with a first electrode and a second chamber with a second electrode by a first separator. The first and second electrodes have opposite polarities and their polarities can be switched. The first separator is an ion channel for cations. The first chamber is provided with a first inlet pipe and a first outlet pipe, and the second chamber is provided with a second inlet pipe and a second outlet pipe. The first and second inlet pipes are arranged in parallel. When the electrode in any chamber is an anode, the inlet and outlet pipes of the current chamber are connected, and the inlet pipes of adjacent chambers are disconnected. The self-cleaning electrolysis module of this application can output electrolysis products with high redox potentials and can also achieve self-cleaning of scale in the chamber by switching electrode polarities.

This application relates to the field of electrolyte materials technology, and in particular to a method for preparing lithium selenide. The method includes: obtaining a precursor source, the precursor source including lithium nitride and a selenium source, and subjecting the precursor source to multiple calcination treatments to obtain lithium selenide. The present invention uses lithium nitride as a lithium source and a selenium source to undergo a redox reaction to generate lithium selenide and nitrogen gas. This method has a low cost, does not produce carbon impurities in the prepared product, and the prepared lithium selenide can be used directly as a high-purity raw material for solid electrolytes. In addition, the reaction between lithium nitride and selenium has low exothermic reaction, the reaction is easy to control, and the safety is higher, avoiding the problem of low safety caused by high exothermic reaction of elemental selenium and elemental lithium in the prior art.

The application discloses a method for promoting paddy field biological nitrogen fixation based on long-distance electron transfer, and comprises the following steps: S1, soil pretreatment, establishing a flooding system; S2, pre-incubation to form a stable redox stratification; S3, constructing a long-distance electron transfer channel; S4, cultivation: under the conditions of flooding and a certain temperature, continue to cultivate to promote the paddy field biological nitrogen fixation in the flooding system. The application does not need an external power supply, only by arranging a graphite rod in the flooded paddy field soil, making it span the surface layer oxidation zone and the lower layer reduction zone, forming a long-distance electron transfer channel, thereby realizing the directional transport and utilization of the lower layer reduction equivalent to the surface layer, providing continuous support for the surface layer nitrogen fixation process from the electron supply end, promoting the nitrogen fixation process, and also promoting the enrichment of paddy field biological nitrogen fixation related microbial groups in the surface layer oxidation zone and changing the iron valence state distribution, promoting the transformation of Fe(III) into Fe(II), and enhancing the coupling of iron reduction and nitrogen fixation process.

This invention discloses a low-temperature resistant, high-power aqueous organic-bromine battery, belonging to the field of electrochemical energy storage technology. The invention uses a low-freezing-point bromine-based salt solution with added bromine solid complexing agent as the electrolyte, and a pseudocapacitive organic material as the negative electrode, which possesses ionic universality and can bind metal ions in the solution during the reaction. The positive electrode uses a carbon material as a substrate, where a bromine redox reaction occurs. Simultaneously, the complexing agent can complex bromine in solid form onto the carbon surface, ensuring good stability at both room temperature and low temperatures. The aqueous organic-bromine battery of this invention exhibits high energy density and ultra-high power density at room temperature, maintains high energy density even at low temperatures, and is inexpensive, showing promising application prospects.

A method may comprise producing liquid sodium and chlorine gas by electrolysis. The liquid sodium may be redox reacted with iron and / or manganese oxide in an ore to produce iron and / or manganese and s

This invention discloses a graphene oxide / carbon nanotube-based coal combustion catalyst, its preparation method, and its applications, belonging to the field of catalytic combustion technology for efficient coal utilization. First, graphene oxide is used as a carrier, and then carbon nanotubes and manganese oxide are grown on its surface in a one-step process using condensation and redox reactions, followed by co-firing with coal. The graphene oxide / carbon nanotube-based combustion catalyst prepared by this invention effectively improves combustion efficiency, reduces the ignition temperature of coal, and lowers the reaction activation energy, resulting in significant economic benefits and broad application prospects.

A composite working electrode and an electrochemical sensor comprising the same are disclosed, the composite working electrode comprising at least one carbon material coated with a polysulfone and at least one active redox species comprising an oxygen family atom bonded in a ring structure, wherein the ring structure is substituted with a carbon ring, and wherein a moiety containing a hydrogen atom is connected to the carbon ring such that it is configured to provide a hydrogen bonding with the bonded oxygen family atom.

This disclosure discloses a method for predicting the environmental transformation performance of pollutants, comprising: obtaining a first target reactivity parameter of a target pollutant and a second target reactivity parameter of a target environmental medium, wherein the first target reactivity parameter includes at least one of the following: a first ionization potential, a first affinity potential, molecular hardness, and molecular softness; the second target reactivity parameter includes: redox potential; inputting the first target reactivity parameter and the second target reactivity parameter into a pre-trained activation energy prediction model, and outputting a target reaction activation energy, wherein the target reaction activation energy characterizes the reaction activation energy of the transformation of the target pollutant on the surface of the target environmental medium; and predicting the transformation performance of the target pollutant on the target environmental medium based on the target reaction activation energy.

This application provides an iron-based thin-film probe, an in-situ analysis method for soil micro-interface pollutants, a screening method for iron-based materials for soil remediation, and a soil remediation method, belonging to the field of environmental analysis and testing technology. The iron-based thin-film probe, used to study the role of iron-containing mineral micro-interface pollutants in soil, is prepared from an iron sheet through in-situ surface modification; wherein the modified surface formed by the in-situ surface modification is selected from any one of nano-zero-valent iron, iron oxide, and iron sulfide; the iron-based thin-film probe is used to simulate the adsorption, distribution, and redox reactions of iron-containing mineral micro-interface pollutants in soil.

A water treatment method comprising electrochemically adsorbing, by using a working electrode formed of an organic redox substance having selective adsorption ability with respect to a specific substance dissolved in water to be treated, the specific substance on the working electrode, wherein the specific substance is ammonium ion, the organic redox substance is a polymer of 2,5-diamino-1,4-benzoquinone, and the ammonium ion is electrochemically adsorbed on the working electrode by applying, to the working electrode immersed in the water to be treated, a first prescribed voltage determined by using the minimum current value of a cyclic voltammogram with respect to the ammonium ion as an index.

The application discloses a kind of heterojunction type indium oxide-based integral photocatalytic foam ceramics and its preparation method and PFAS degradation application. Indium oxide powder, hetero-structure component, various additives and reinforcing fibers are made into composite slurry, through organic foam impregnation forming, and then dried, degummed and sintered to prepare finished product. In the sintering stage, interface chemical bonding is realized by in-situ solid-phase reaction, S-shaped and Z-shaped charge transfer heterojunction is constructed, and the separation efficiency of photo-generated carriers is greatly improved. The material has high porosity and excellent mechanical strength, and relies on the advantages of double potential to build a redox synergistic defluorination system, generating multiple active species, which can effectively break the high-energy C-F bond and achieve efficient degradation and deep defluorination mineralization of PFAS pollutants such as PFOA and PFOS.

The present invention provides a method (600a) and apparatus for producing an alkaline mixture comprising sodium silicate, which mixture is suitable for use as an alkaline activator for alkaline activated and geopolymer cements, but which may also be used, for example, to mineralize captured carbon dioxide. The method comprises comminuting (301) an ore of a target metal into fines, wherein the ore comprises a siliceous mineral and at least one of iron and manganese as the target metal. The siliceous mineral may comprise the target metal itself and / or it may be silica and / or another silicate mineral present as gangue. The ore is dehydrated and hydroxylated compounds contained therein are dehydroxylated (302). The ore thus treated is then reacted (601) in an inert atmosphere with an amount of liquid sodium in excess of the stoichiometric amount thereof required for a redox reaction between the liquid sodium and an oxide of the target metal from the ore, to precipitate out from the liquid sodium a solid phase comprising both the target metal in elemental form and other insoluble products comprising sodium oxide. The redox reaction is conducted at a temperature of at least 320 °Celsius to induce a reaction between the sodium oxide and silica derived from the siliceous mineral to produce sodium silicate, but also below a temperature at which the liquid sodium can react with the oxide of the target metal to produce a ternary oxide thereof. At least some of the liquid sodium having sodium silicate dissolved therein is then separated (305) from the solid phase and is reacted (602) with at least one of oxygen and water to produce a mixture comprising sodium silicate and at least one of sodium oxide and sodium hydroxide. The corresponding apparatus comprises a comminution device (such as a rock crusher or grinder), means for dehydrating and dehydroxylating the ore (such as a dryer), a gas-tight first reaction vessel for reacting the ore thus treated with the liquid sodium, a solid-liquid sodium phase separator, and a second reaction vessel for reacting the liquid sodium having sodium silicate dissolved therein with at least one of oxygen and water. The resulting alkaline mixture is therefore produced whilst extracting the target metal in elemental form from its ore. Thus the energy consumed is split between the production of these two co-products, making the method of the invention a low-energy method of producing an alkaline activator for alkaline activated and geopolymer cements. Both reactions (601, 602) are also significantly exothermic and at least some of the thermal energy from them may be recycled. The invention does not consume any carbon and is therefore at least carbon-neutral. On the other hand, it consumes the silica content of gangue mineral species and / or of siliceous minerals of the target metal in its ore, which have previously been treated as waste products. The amount of waste material produced when extracting the target metal from its ore is thereby reduced as well.

This invention discloses an electrochromic covalent organic framework material and its application in smart windows, belonging to the technical field of electrochromic functional materials. The material possesses a gradient-tunable band structure and redox potential. The preparation method involves mixing a monomer containing tris(4-aminophenyl)amine with monomers containing linker units with different numbers of nitrogen atoms and an organic solvent, ultrasonically dispersing the mixture, and then adding a catalyst to form a mixture. A cleaned ITO glass is immersed in the mixture. The mixture undergoes cryogenic degassing, followed by in-situ polymerization under heating conditions. After the reaction, the product is washed and dried to obtain an electrochromic COF film. This invention achieves a positive shift in the oxidation potential system and an expansion of the charge delocalization range through the modulation of the electronic structure of the linker units. The material exhibits high optical contrast, fast response, low driving voltage, and good cycling stability.

The application provides a BiFeO3-graphitic carbon nitride photocatalyst and a preparation method and application thereof, relates to the field of photocatalysis technology, and the preparation method comprises the following steps: dissolving a bismuth source and an iron source in a solvent, mixing with a mineralizer, and performing a hydrothermal synthesis reaction to obtain BiFeO3; performing first calcination treatment on a nitrogen-containing organic precursor to obtain graphitic carbon nitride; and performing grinding treatment and second calcination treatment on the mixture of BiFeO3 and graphitic carbon nitride to obtain the BiFeO3-graphitic carbon nitride photocatalyst. The preparation method can construct a Z-type heterojunction at the interface of the separately prepared BiFeO3 and graphitic carbon nitride, form an internal electric field, efficiently separate photo-generated electrons and holes, effectively inhibit the recombination of the photo-generated electrons and holes, finally significantly enhance the redox capacity of the material, and make the material exhibit excellent photocatalytic performance, high selectivity and good cycle stability.

The application belongs to the field of photoelectric materials and devices, and discloses a method for preparing metal-doped graphene oxide conductive ink, which comprises the following steps: immersing a metal substrate into an aqueous solution of graphene oxide, and carrying out a redox reaction to obtain reduced graphene oxide ink loaded with metal oxide particles. The method realizes the preparation of reduced graphene oxide conductive ink loaded with metal oxide particles through in-situ spontaneous redox reaction of graphene oxide and the metal substrate. Compared with the traditional method for preparing metal-doped graphene ink, the method can realize in-situ low-temperature redox, avoids the use of organic solvents or ionic liquids, reduces the residual organic matter, and significantly improves the conductivity by in-situ embedding of metal oxide particles.

The application provides a method for preparing bismuth trioxide-cuprous oxide nanocomposite based on a synergistic reaction, which comprises the following steps: dispersing sodium bismuthate, sodium sulfite and cuprous chloride in deionized water to obtain a solid-liquid mixture; and placing the solid-liquid mixture under a hydrothermal condition, so as to in-situ prepare the Bi2O3-Cu2O nanocomposite through the synergistic effect of the redox reaction between sodium bismuthate and sodium sulfite in the system and the anion exchange reaction between cuprous chloride and hydroxyl ions generated in-situ. The application is based on the synergistic effect of the redox reaction and the anion exchange reaction under the same hydrothermal condition, and high-purity Bi2O3-Cu2O nanocomposite can be prepared in-situ in one step without adding an alkali source and a template agent. The prepared composite can effectively form a p-n heterojunction, significantly inhibit the recombination of photo-generated carriers, improve the photocatalytic activity and redox capacity of the material, and the preparation process is simple, green and economical, and easy for industrialized production.

This invention discloses a slow-release sulfurizing agent Fe x S y Its preparation method and application as a rhenium extraction material: Step 1: The pyrite-doped metal roasting product is subjected to an oxidation-reduction reaction, and the raw material is dried and roasted to obtain the product; Step 2: The product is ground and screened to obtain the slow-release sulfiding agent Fe. x S y The slow-release sulfurizing agent Fe x S y Its application, as a slow-release sulfide material, is used in metal corrosion protection, heavy metal-containing wastewater treatment, and soil sulfide replenishment; this invention achieves S 2 The slow release of the substance controls the local effective concentration and forms highly active iron-sulfur chemical bonds. At the same time, the crystal structure is a low-stability crystal system, thus exhibiting high chemical reactivity, which has obvious technical advantages over existing rhenium extraction materials.

This invention discloses a method for preparing anion-controlled sodium-ion layered cathode material, comprising the following steps: mixing a metal salt of the sodium-ion layered material with an anion source, drying, and then sintering at high temperature to obtain anion-controlled sodium-ion battery layered cathode material solid powder particles. The incorporated anion element can suppress the redox reaction of oxygen at high potentials, thereby enhancing the high-potential capacity and cycle stability of the material. According to this invention, the process is simple, and the rate performance and electrochemical stability of the obtained cathode material are significantly improved.

This invention discloses a method for preparing cobalt-manganese sulfide nanosheets@cobalt-copper sulfide nanowire arrays / nickel foam as a supercapacitor electrode material. The purpose of this invention is to design a core-shell structure composed of different components to improve the specific capacity and cycle performance of the electrode material. This invention mainly includes: 1. Hydrothermal preparation of cobalt-copper precursor / nickel foam (CoCu-pre / NF); 2. Hydrothermal sulfidation preparation of cobalt-copper sulfide nanosheet arrays / nickel foam (CuCo2S4 / NF); 3. Hydrothermal preparation of cobalt-manganese sulfide nanosheets@cobalt-copper sulfide nanowire arrays / nickel foam (MnCoS@CuCo2S4 / NF). This invention features a simple synthesis process, low cost, high yield, and no need for subsequent processing. The MnCoS@CuCo2S4 heterostructure exhibits stronger OH... ‑ The MnCoS@CuCo2S4 / NF electrode exhibits high capture capacity and excellent conductivity, thereby enhancing the efficiency of rapid redox processes. At 1 A g... ‑1 At that time, it obtained 1141.2 C g. ‑1 The specific capacitance at 10 A g ‑1 It exhibits excellent cycling performance of 90.7% over 10,000 cycles. (740.47 W kg) ‑1 At a power density of 64.38 Wh / kg, the hybrid supercapacitor (HSC) can provide 64.38 Wh / kg. ‑1 The electrode exhibits high energy density and can successfully light up LED bulbs. It has enormous application potential as a high-performance electrode material for supercapacitors.