118results about How to "Many active sites" patented technology

The invention relates to an oxygen evolution catalyst for hydrogen production through electrolysis of proton exchange membrane water, a membrane electrode and a preparation method of the membrane electrode, and the oxygen evolution catalyst is iridium oxide in a nanoparticle form and contains 2-2.5% of crystal water; the preparation method of the catalyst comprises the following steps: carrying out ultrasonic treatment on an iridium salt solution, mixing the iridium salt solution with magnesium sulfate and water, carrying out ultrasonic treatment, volatilizing a solvent, drying, carrying out ball milling to obtain powder, carrying out high-temperature calcination, dissolving with dilute acid, carrying out suction filtration with water and ethanol until the conductivity is less than 10 [mu] s / cm, carrying out vacuum drying to remove moisture, and grinding to obtain the catalyst. The membrane electrode comprises the catalyst powder prepared by the method and an anode catalyst layer formed by perfluorinated sulfonic acid resin; and the cathode catalyst layer is formed by Pt / C and perfluorosulfonic acid resin. The oxygen evolution catalyst provided by the invention has high activity and high stability, magnesium sulfate is adopted in the preparation method, and the oxygen evolution catalyst has the advantages of simple operation, low cost and the like.

The invention relates to the technical field of photocatalytic processes, in particular to a catalyst for preparing methanol through photocatalytic reduction of CO2 as well as a preparation method and application of the catalyst. The catalyst comprises a composite carrier and active sites dispersed on the surface or in pores of the composite carrier, the composite carrier is of a heterojunction composite structure formed by a hollow TiO2 sphere and MCN, the hollow TiO2 sphere comprises a shell layer and a spherical cavity structure located in the shell layer, the shell layer is formed by TiO2 nanoparticles, and the MCN has a mesoporous pore structure; a II-type or Z-type heterojunction interface is formed between the hollow TiO2 spheres and the MCN through physical contact and chemical action; the active sites comprise copper nano species, sulfur vacancy defects and amino groups; the copper nano species are copper nano particles or clusters, and the valence state of copper is 0 and / or + 1 valence amino is grafted on the surface of the composite carrier through an organic long chain. The catalyst provided by the invention can greatly improve the yield and selectivity of methanol prepared by photocatalytic reduction of carbon dioxide.

This invention provides a self-supporting one-dimensional nanorod array composite material, its preparation method, and its application, belonging to the field of clean energy harvesting technology. The preparation method provided by this invention includes the following steps: mixing soluble nickel salt, soluble molybdate, and water, and carrying out a hydrothermal reaction to obtain a NiMo precursor; heat-treating the NiMo precursor and a modifier under a protective atmosphere to obtain the self-supporting one-dimensional nanorod array composite material. Experimental results show that the composite material prepared by the method provided by this invention has excellent electrocatalytic water splitting activity and operational stability, and photo-assisted synthesis further enhances the electrocatalytic water splitting activity of the composite material, making it applicable to solar-driven electrocatalytic water splitting.

The application belongs to the technical field of carbonyl sulfur hydrolysis catalysts, and discloses a high-efficiency sulfur-resistant catalyst for carbonyl sulfur hydrolysis, a preparation method and application thereof.The preparation method comprises the following steps: (1) preparing a porous ceramic carrier containing alumina, titanium dioxide and zirconium dioxide; (2) in-situ growing a metal organic framework material containing lanthanum, bismuth and cerium on the surface of the porous ceramic carrier by using a solvothermal method; (3) performing a calcination treatment on the porous ceramic carrier loaded with the metal organic framework material in an oxygen-containing atmosphere to obtain a catalyst precursor; and (4) performing a reducing gas plasma bombardment treatment on the catalyst precursor to obtain the high-efficiency sulfur-resistant catalyst.The high-efficiency sulfur-resistant catalyst has high-efficiency low-temperature activity, excellent sulfur resistance and long service life.

The invention relates to an interface engineering method of Zn0. 5Cd0. 5S loaded on a high-entropy sulfide cocatalyst and an application of the Zn0. 5Cd0. 5S. According to the method, firstly, a high-entropy sulfide FeCoNiCrAlSx (HES) is synthesized by adopting a solvothermal method, then the high-entropy sulfide HES is introduced into a Zn0. 5Cd0. 5S system through a one-step coprecipitation method, a compact interface is formed between FeCoNiCrAlSx and Zn0. 5Cd0. 5S, and meanwhile, FeCoNiCrAlSx provides abundant active sites. The obtained composite material can promote effective separation and transfer of photo-induced electron holes, the photocatalytic hydrogen production activity of Zn0. 5Cd0. 5S is remarkably improved, and new possibility is provided for designing an efficient and stable non-noble metal photocatalytic system.

This application relates to the field of metal-organic framework material preparation technology, and provides a metal element-doped metal-organic composite and its preparation method. The molecular formula of the metal element-doped metal-organic composite is M. a Zr6O m (OH) n (OL) 6‑(x+y) / 2 (sol) x (blank) y N b , 0.01≤a≤2.3, 4≤m≤6, 0≤n≤4, 0.09≤x≤0.92, 1.8≤y≤6.02, 0.905≤b≤9.24; M is a metallic element, including at least one of Li, Na, K, Ca, Mg, Cu, Co, Ni, Fe, Cr, Zn, and Mn; OL is a dicarboxylic acid conjugated organic ligand; sol includes acetate, formate, and CH3(CH2). p COO ‑ At least one of the following, 1≤p≤6, blank is a ligand vacancy, and N is a counter ion.

This invention relates to the field of battery separator materials technology, specifically to MXene-functionalized aramid paper-based battery separators, their preparation methods, and applications. Meta-aramid paper is prepared by wet papermaking using short-cut meta-aramid fibers and precipitated fibers. MXene nanosheets are prepared by hydrofluoric acid etching. Using the meta-aramid paper as a substrate, a functional coating is constructed on the surface of the aramid paper by loading a mixture of para-aramid nanofibers and MXene through a vacuum-assisted filtration-layer-by-layer self-assembly method. The resulting functionalized separator is obtained through protonation reduction. The separator, with its three-dimensional porous protective layer constructed from para-aramid nanofibers and MXene, combines physical barrier and chemical bonding, effectively inhibiting polysulfide shuttle. Furthermore, the highly active sites of MXene can activate inert sulfur-containing substances, improving sulfur utilization. When used in assembling lithium-sulfur batteries, the separator achieves an initial discharge capacity of 1244 mAh·g at a constant current density. ‑1 The capacity retention rate is 82% after 200 cycles.

The invention discloses corrosion aluminum powder and a preparation method and application thereof, and the preparation method comprises the following steps: S1, carrying out plasma passivation treatment on aluminum powder to obtain surface modified aluminum powder with an amorphous aluminum oxide layer; and S2, carrying out surface micro-corrosion on the surface modified aluminum powder, and then drying and grading to obtain the corroded aluminum powder. The method comprises the following steps: forming an amorphous aluminum oxide layer on the surface of aluminum powder; and then micro-corrosion is carried out on the amorphous aluminum oxide layer, a rich pore structure is formed on the amorphous aluminum oxide layer, and after corrosion is completed, the amorphous aluminum oxide layer can be automatically formed on the corrosion surface again. The surface of the obtained corrosion aluminum powder is completely wrapped by the amorphous aluminum oxide layer, so that the leakage current can be greatly reduced, and the electrochemical stability of the anode foil is greatly improved; the porous carbon has certain roughness and rich pore structures, and the specific surface area and the specific volume are greatly increased; the micro-corrosion has no negative influence on the mechanical strength of the aluminum powder, and ensures that no micro-crack appears on the surface of the anode foil.

This invention provides a double-defect type Bi 12 O 17 This paper describes the preparation method and application of Bi2 ultrathin nanosheet photocatalysts, belonging to the field of photocatalytic materials technology. The preparation method is as follows: Bi2 is prepared by reacting a strong base with BiCl3 under ultrasonic assistance. 12 O 17 Cl2 ultrathin nanosheet precursor; then the precursor is mixed with sodium borohydride and a sulfur source and ground to obtain the target catalyst. In Bi 12 O 17 Sulfur doping and oxygen vacancies are simultaneously introduced into Cl2 ultrathin nanosheets to construct a doped-vacancy dual-defect system. By comprehensively utilizing the synergistic enhancement effect of the dual defects, the bottleneck of single-defect modification is overcome, thereby achieving a comprehensive improvement in photocatalytic performance (light capture, charge separation, surface reaction, and stability). This invention features a simple process, low requirements for preparation conditions, and is easily achievable for mass production, demonstrating high practical value and application prospects.

The invention relates to the technical field of catalyst preparation and discloses a skeleton type iron-based molecular sieve as well as a preparation method and application thereof. The method comprises the following steps: (1) in the presence of a solvent, pre-reacting an Fe source, an M source and a zeolite molecular sieve, and drying to obtain a precursor; (2) calcining the precursor at the temperature of 500 DEG C or above for the first time, and then performing thermal modification in a hydrogen-containing atmosphere to obtain Fe / M seed crystal; and (3) mixing the Fe / M seed crystal with a silicon source, an aluminum source and a template agent, carrying out hydrothermal treatment, separating, drying, and carrying out secondary calcination at 500 DEG C or above to obtain the skeleton type iron-based molecular sieve. Through the synergistic effect of a hydrogen reduction seed crystal method and specific auxiliary metal, the skeleton type iron-based molecular sieve catalyst which has the denitration efficiency of 87% or above at the high temperature of 650 DEG C and has excellent cycle stability and high-temperature hydrothermal stability is successfully prepared.

This invention relates to a mesoporous platinum@platinum-nickel core-shell framework nanowire and its preparation method, comprising the following steps: (1) uniformly mixing platinum precursor, nickel precursor, structure directing agent, and reducing agent with a first solvent, and performing a hydrothermal reaction to obtain Pt@Pt-Ni core-shell nanowires; (2) uniformly mixing the Pt@Pt-Ni core-shell nanowires with a second solvent and acetic acid, and performing an etching reaction to obtain etched mesoporous platinum@platinum-nickel core-shell framework nanowires. This invention employs a hydrothermal method, which is simple, reproducible, and allows for batch production with safety. Compared with traditional commercial platinum-carbon catalysts, the catalytic activity is greatly improved, the stability is greatly enhanced, and the production cost is reduced.

This invention discloses a palladium / ruthenium / two-dimensional monolayer titanium carbide macene nanosheet / three-dimensional nickel foam composite electrode, its preparation method, and its application. Belonging to the field of electrochemical materials technology, it addresses the problem of the lack of high-efficiency, high-degradation, and economical electrode materials in existing technologies, which limits the development of electrocatalytic degradation of antibiotics. The palladium / ruthenium / two-dimensional monolayer titanium carbide macene nanosheet / three-dimensional nickel foam composite electrode of this invention comprises, from the inside out, a nickel foam matrix, a two-dimensional monolayer titanium carbide macene nanosheet intermediate layer, a ruthenium intermediate layer, and a palladium layer. Using the palladium / ruthenium / two-dimensional monolayer titanium carbide macene nanosheet / three-dimensional nickel foam composite electrode as the working electrode, tetracycline-containing wastewater is degraded by electrochemical oxidation. It can efficiently degrade tetracycline in wastewater without causing secondary pollution to water bodies, thus achieving the goal of low-cost environmental protection and water conservation.

The invention discloses a WS2 / W composite material, a preparation method thereof and application of the WS2 / W composite material in a sodium-sulfur battery. The preparation method comprises the following steps: uniformly stirring isopropanol and acetone to obtain a mixed solution A; weighing tungsten hexachloride, adding the tungsten hexachloride into the mixed solution A, and uniformly stirring to obtain a mixed solution B; transferring into a reaction kettle, sealing and putting into a drying oven for reaction; after the reaction is finished, carrying out suction filtration and washing on a product by using industrial alcohol, and drying in a vacuum oven to obtain W18O49 powder; the method comprises the following steps: weighing W18O49 powder and sublimed sulfur, respectively and correspondingly placing the W18O49 powder and sublimed sulfur in a first porcelain boat and a second porcelain boat, then placing the second porcelain boat in the first porcelain boat, placing the second porcelain boat in a tubular furnace, introducing argon into a furnace chamber of the tubular furnace, after the pressure of the furnace chamber is increased to 0.2-0.3 MPa, keeping the airtightness of the system, heating to 1100-1300 DEG C at the rate of 20 DEG C / min, keeping the pressure at 0.2-0.3 MPa in the heating process, and keeping the temperature for 2-3 hours; and after the temperature reaches 1100-1300 DEG C, continuously preserving heat for 2 hours, introducing argon, cooling to room temperature, and collecting to obtain WS2 / W powder. The problems of poor conductivity of the sulfur positive electrode, polysulfide shuttle effect and slow reaction kinetics are solved.

The application relates to the technical field of battery materials, and discloses a sodium-philic carbon-based material, a negative-electrode-free current collector, a preparation method of the sodium-philic carbon-based material and a sodium metal battery. The preparation method of the sodium-philic carbon-based material comprises the following steps: providing a mixed solution, wherein the mixed solution comprises carbon source powder, an iron source and a solvent; fully reacting the mixed solution in a protective atmosphere at 160-240 DEG C; obtaining a carbon-loaded sodium-philic material after solid-liquid separation; fully calcining the carbon-loaded sodium-philic material in an inert atmosphere at 700-900 DEG C to obtain a porous sodium-philic precursor; and treating the porous sodium-philic precursor in a reaction gas atmosphere at 400-700 DEG C for 1-3 hours to obtain the sodium-philic carbon-based material. The reaction gas atmosphere is an ammonia gas and inert gas mixed atmosphere or an ammonia gas atmosphere. The material is coated on the surface of the negative-electrode-free sodium metal battery current collector, and can enhance the electrochemical performance of the battery.

The application belongs to the chemical field and provides a preparation method of a catalyst for methane dry reforming; a 3D-Ti-Ce-O carrier is prepared, and Ni, Fe and Nb active metals are loaded on the 3D-Ti-Ce-O carrier to obtain a Ni-Fe-Nb / 3D-Ti-Ce-O catalyst. The application also simultaneously provides a methane dry reforming reaction; CH4 and CO2 are mixed according to a volume ratio of 1:1 and input into the inner cavity of a quartz tube as raw gas from a gas outlet, and then the raw gas is contacted with the catalyst and reacts under the action of plasma discharge to generate CO and H2. The Ni-Fe-Nb / 3D-Ti-Ce-O catalyst provided by the application has high methane and carbon dioxide conversion rate and long-term stability in DBD.

The invention discloses an organic phosphorus wastewater degradation and phosphorus recovery experimental device and method, and particularly relates to the field of organic phosphorus wastewater treatment.The organic phosphorus wastewater degradation and phosphorus recovery experimental device comprises an electric reaction box, a recovery reaction unit capable of performing electrochemical reaction is arranged in the electric reaction box, and a water inlet pipe and a water outlet pipe are arranged between the two sides of the recovery reaction unit and the electric reaction box respectively; the recovery reaction unit comprises a water storage reaction box, a Fe3O4-coated N-GO negative plate and a titanium platinum positive plate are arranged in the water storage reaction box, the Fe3O4-coated N-GO negative plate is used for preparing Fe3O4-coated N-GO by adopting a one-step hydrothermal method, the Fe3O4-coated N-GO is loaded on an electrode, and the Fe3O4-coated N-GO negative plate has excellent electron transfer efficiency and catalytic activity. The organic phosphorus wastewater can be completely degraded within 40 minutes, and the PO4 < 3-> conversion rate is 35%; by constructing a continuous operation system for electrochemical degradation and recovery of the organophosphorus wastewater, efficient degradation and detoxification of the organophosphorus wastewater are realized, released phosphorus is recovered, and the method has practical significance of reducing treatment cost and increasing economic benefits.

This invention discloses a three-armed cadmium sulfide nanorod photocatalyst, comprising: three-armed cadmium sulfide nanorods, molybdenum disulfide, and iridium disulfide; wherein each of the three tips of the three-armed cadmium sulfide nanorods is loaded with molybdenum disulfide and iridium disulfide. This photocatalyst is obtained by mixing the three-armed cadmium sulfide nanorods with iridium chloride and sodium molybdate in a solvent, followed by a hydrothermal reaction. This invention achieves efficient separation of photogenerated electron-hole pairs and improves photocatalytic performance by successfully loading molybdenum disulfide and iridium disulfide nanoflower-like co-catalysts onto the tips of the three-armed cadmium sulfide nanorods.

The application discloses a preparation method of a polymyxin B sulfate dry powder and belongs to the technical field of medicine preparation. The preparation of the polymyxin B sulfate dry powder is that the polymyxin B sulfate fermentation liquor is subjected to adsorption filtration by using a ZIF-8@polyurea / polyether sulfone composite membrane, and the filter cake is subjected to elution by using a sulfuric acid aqueous solution. The eluate is post-treated to obtain the polymyxin B sulfate dry powder. The application has the advantages of mild preparation condition, simple process, low reaction energy consumption and industrial application prospect.

The present application relates to the technical field of gel electrolyte for supercapacitor, in particular to a gel electrolyte based on lysozyme amyloid fibers and application thereof. The ion conductivity of the conventional plant protein-based gel electrolyte is poor, and the electrical performance needs to be further improved. In view of the above problems, the present application provides a gel electrolyte based on lysozyme amyloid fibers. The lysozyme in the formula self-assembles into amyloid fibers under acidic conditions, and the surface of the amyloid fibers is rich in polar groups such as hydroxyl, carboxyl and amino groups, which can effectively promote the dissociation of lithium salt. At the same time, the three-dimensional network structure formed by the self-assembly of the fibers. Glycerol as a small molecule plasticizer inserts between the polymer chains. Lithium perchlorate and other lithium salts can provide high concentration of free lithium ions due to the large anion volume and low dissociation energy. The above components synergize and jointly act, effectively improving the comprehensive electrical performance of the gel electrolyte.

The application provides a Bi2O2CO3-MIL-68(In) heterojunction composite material and a preparation method and application thereof, and belongs to the technical field of photocatalytic materials, the field of persulfate catalysis and the field of environmental governance. The composite material is obtained by loading Bi2O2CO3 on the surface of MIL-68(In) to form a Z-type heterojunction structure; the Bi2O2CO3 is a spherical body with a diameter of 200-500 nm, and the surface is a stacked granular structure; the MIL-68(In) is a regular hexahedral rhombic rod-shaped structure with a particle size of 5-10 mu m, and the Bi2O2CO3 is dispersedly loaded on the surface of the MIL-68(In). The application has the advantages of simple operation, strong visible light absorption capacity of the heterojunction material, stable photocatalytic performance, high degradation efficiency and the like, and has a potential application prospect in the field of photocatalytic persulfate.

The invention discloses a nitrogen-doped ruthenium oxide loaded graphene electrocatalyst and a preparation method and application thereof, and belongs to the technical field of electrocatalysts.The preparation method comprises the steps that a nitrogen source, a ruthenium source and graphene are added into water, stirred and freeze-dried, and a precursor is obtained; and heating the precursor to 450-700 DEG C in an air atmosphere, and annealing to obtain the nitrogen-doped ruthenium oxide loaded graphene electrocatalyst. Ruthenium oxide particles are loaded on the surface of graphene, nitrogen is introduced at the same time, nano-sheet-loaded evenly-distributed small nano-particles are obtained, the specific surface area is large, more active sites are exposed, the atomic structure is further adjusted and optimized through introduction of the nitrogen, excessive oxidation of ruthenium oxide at an anode is inhibited, and the electrochemical performance of the anode is improved. Therefore, the electrocatalytic oxygen evolution performance and stability of ruthenium oxide are greatly improved.

The invention discloses an II-type heterojunction BiOBr / NiV-LDH composite photocatalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing NiV-LDH powder by adopting a hydrothermal method; the BiOBr / NiV-LDH composite photocatalytic material is further prepared by adopting a sol-gel method; the micro-morphology of the BiOBr / NiV-LDH composite photocatalyst is accurately regulated and controlled to be of an II-type heterojunction nanosheet structure by regulating and controlling key process parameters such as the reaction temperature and the reaction time of a sol-gel method; according to the structure, the specific surface area of the material is greatly increased, and then rich active sites are provided for photocatalytic reaction; in the prepared BiOBr / NiV-LDH composite photocatalytic material, an II-type heterojunction structure formed by BiOBr and NiV-LDH can obviously reduce the recombination rate of photo-induced electron-hole pairs, and the visible light response range of the material is effectively widened; meanwhile, NiV-LDH has excellent photo-generated hole capturing capability, can be used as a cocatalyst for surface oxidation reaction, and synergistically improves the photocatalytic performance, so that the composite material finally shows excellent catalytic activity and stability in the field of pollutant degradation.

The invention relates to a silicon-copper co-oxide catalyst for strengthening CO2 electroreduction and preparation and application of the silicon-copper co-oxide catalyst for strengthening CO2 electroreduction, and the preparation method comprises the following steps: dissolving soluble copper salt and tetraethoxysilane in ethanol to form a uniformly mixed precursor solution; the precursor solution is conveyed to a spraying nozzle through a sample injection pump, the spraying nozzle atomizes the precursor solution into aerosol through atomization gas and sprays the aerosol into a combustion chamber, the aerosol is combusted under the high-temperature condition of the combustion chamber, evaporation, pyrolysis and oxidation reactions are generated, and nano-particles are generated; and putting the nano particles into a quenching device, and rapidly cooling to obtain a nano Si-Cu-Ox co-oxide, namely the catalyst. When the catalyst is applied to the process of preparing ethylene through CO2 electroreduction, Cu < + > active species generated in the electroreduction process can be stabilized and prevented from being reduced, so that C-C coupling of an intermediate product is strengthened, and the selectivity of an ethylene product is remarkably improved.

The application provides a modification method of nitrocellulose membrane and application thereof in preparation of microRNA nucleic acid test strips, and relates to the technical field of nucleic acid lateral chromatographic detection.The application provides a modification method of nitrocellulose membrane, which comprises the following steps: treating the nitrocellulose membrane under plasma conditions; the power of the plasma treatment is 25-80 W; the pressure of the plasma treatment is 35-70 Pa; and the time of the plasma treatment is 70-350 s.The modification method of the nitrocellulose membrane can effectively improve the surface performance of the nitrocellulose (NC) membrane, significantly enhance the surface wettability of the nitrocellulose membrane, make the nitrocellulose membrane have strong hydrophilicity, improve the loading capacity of probes, and enhance the stability of probe fixation, so that the cost is reduced and the sensitivity and specificity of the microRNA nucleic acid test strip are improved.

The invention discloses a residual oil hydrotreating catalyst and a preparation method thereof, and belongs to the technical field of catalytic materials. The preparation method comprises the following steps: S1, mixing dolomite, cerous carbonate, a zirconium oxide precursor and a silicon dioxide precursor, drying and calcining to obtain a composite carrier, and performing in-situ pore forming by utilizing gas generated by decomposition of the dolomite and the cerous carbonate to form a mesoporous structure; s2, dipping the composite carrier in a modification liquid containing chitosan and mannuronic acid, and constructing a cross-linked network coating on the surface of the composite carrier through a Schiff base reaction to obtain a modified carrier; s3, dipping the modified carrier in a precursor solution containing a nickel source, a molybdenum source and a sulfur source, and performing adsorption, drying and roasting to obtain the catalyst. Through the synergistic effect of pore structure regulation and surface modification, the carrier with high porosity and suitable pore distribution is obtained, and meanwhile, high dispersion and stable loading of active metal components are realized. The catalyst shows excellent hydrodesulfurization, denitrification and demetallization performance in residual oil hydrotreatment.

The invention discloses an NO2 gas sensing material, an NO2 gas sensor and a preparation method and application of the NO2 gas sensing material and the NO2 gas sensor. The NO2 gas sensing material is a semiconductor substrate material doped with variable-valence metal elements; the material of the semiconductor substrate is BiOX, and the element X is at least one of Cl, Br and I; the variable-valence metal element is a variable-valence transition metal element. The invention provides a design and preparation method of a gas sensor capable of rapidly detecting NO2 at room temperature. The method can realize reversible detection of NO2 at room temperature.

The invention relates to a preparation method of a nickel-based electrode and a method for electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) by using the nickel-based electrode. The nickel-based electrode comprises a substrate material and a catalyst layer, and the catalyst layer is nickel hydroxide in different forms or chromium-doped nickel hydroxide. According to the chromium-doped nickel hydroxide electrode, the catalytic performance of electrooxidation of HMF into 2, 5-furandimethyl (FDCA) can be greatly improved. Taking the nickel-based electrode as an anodic oxidation electrode, taking metal platinum as a cathode electrode, respectively filling two sides of a double-chamber electrolytic cell separated by an ion exchange membrane, adding an alkaline electrolyte into two sides of the electrolytic cell, and adding an HMF solution into the anode side; the electrocatalytic oxidation method is carried out in the electrolytic cell under a certain voltage, the anode is subjected to an HMF electrooxidation reaction and is converted into FDCA, and the cathode is subjected to an electrolytic water hydrogen evolution reaction. The nickel-based catalyst can efficiently electro-catalyze HMF to be oxidized into FDCA, meanwhile, the electrolytic water hydrogen evolution reaction is coupled, and the nickel-based catalyst has excellent catalytic efficiency and stability.

The invention discloses a nano porous nickel electrocatalyst material as well as a preparation method and application thereof. Belongs to the technical field of electrolyzed water hydrogen production catalysts. According to the method, a nickel net substrate is subjected to pretreatment, electrogalvanizing, high-temperature alloying and chemical dealloying, and finally the nano-porous nickel electrocatalyst material growing on the nickel net is obtained. The electrocatalyst material prepared by the method has a uniform three-dimensional nano porous structure, the thickness of a porous layer is 10-70 [mu] m, and the aperture is 100-500 nm. As an alkaline electrolytic water hydrogen evolution reaction cathode catalyst, the material has high specific surface area and rich active sites, and shows lower overpotential and excellent long-term stability. The method is simple in technological process, raw materials are easy to obtain, and the method has large-scale production potential and has wide application prospects in the field of hydrogen production through water electrolysis.

The invention belongs to the technical field related to water treatment, and particularly discloses a method for electrocatalytic enrichment of uranium by using zero-valent iron aerogel, and the method comprises the following steps: slicing hydrophilic carbon paper, and treating for later use; the preparation method comprises the following steps: dissolving zero-valent iron aerogel and an adhesive in an organic solvent, and performing ultrasonic dispersion to form uniform catalyst slurry; uniformly coating the surface of pretreated carbon paper with the obtained slurry in an oxygen-free environment, drying to obtain a zero-valent iron aerogel-loaded carbon paper working electrode, forming a three-electrode system by matching the prepared working electrode with a counter electrode and a reference electrode, and performing electrochemical reduction reaction on uranium-containing water in an electrolytic tank by applying pulse voltage to obtain uranium-containing water. Uranium is enriched in the working electrode. The zero-valent iron aerogel loaded electrode with high specific surface area and excellent electron conduction performance is constructed, the low-pulse voltage electro-catalysis technology is combined, efficient, high-selectivity and low-energy-consumption enrichment of uranium in seawater is achieved, and the dual functions of resource recovery and environmental pollution control are achieved.

This invention relates to a method for preparing a vanadium selenide / vanadium oxide heterojunction photo-assisted zinc-ion battery, belonging to the technical field of vanadium selenide / vanadium oxide heterojunction photo-assisted electrochemical energy storage and zinc-ion battery. The method includes the following steps: mixing a selenium source solution and a vanadium source solution to obtain a reaction precursor solution; subjecting the reaction precursor solution to a hydrothermal reaction and washing to obtain vanadium selenide material; annealing the vanadium selenide material to form a vanadium oxide layer on its surface, obtaining a vanadium selenide / vanadium oxide heterojunction composite material; mixing the vanadium selenide / vanadium oxide heterojunction composite material, a conductive agent, and a binder, adding a solvent to prepare a slurry, coating the slurry onto the surface of a current collector, and drying to obtain a photocathode. The material and its application system described in this invention exhibit good specific capacity, rate performance, and cycle stability, and demonstrate good energy storage performance under illumination conditions; this invention is beneficial for further reducing electrode polarization and promoting the synergistic enhancement of electron transport and zinc-ion storage.