165results about How to "Many active sites" patented technology

The invention relates to the technical field of sodium ion battery positive electrode materials, in particular to a carbon-coated sodium ferric phosphate pyrophosphate positive electrode material and a preparation method and application thereof.The preparation method includes the steps that carbon nanotubes and an organic carbon source serve as carbon sources to prepare two kinds of sodium ferric phosphate pyrophosphate particles, and the two kinds of particles are mixed in proportion and then sintered to obtain the carbon-coated sodium ferric phosphate pyrophosphate positive electrode material. In the carbon layer coated on the surface of the material, the carbon nanotubes and the organic carbon source exert respective conductive advantages to form a strong conductive network, so that the conductivity of the material is improved, and the overall structural rigidity of the material is enhanced.

The invention discloses a coal-based hard carbon material as well as a preparation method and application thereof. The method comprises the following specific steps: crushing and screening a coal-based raw material, pickling and deliming to obtain ultra-pure coal powder; mixing the ultra-pure pulverized coal with the soft carbon precursor, and performing carbonization treatment in an inert atmosphere; and mixing the carbonized sample with a solvent, and carrying out secondary sintering and curing to obtain the coal-based hard carbon material. The soft carbon precursor coating layer is used for reducing surface irreversible defects and improving coulombic efficiency and electronic conductivity, oxygen-containing functional groups such as carbonyl are introduced and cured in combination with the capacity increasing agent and secondary sintering, more reversible active sites are provided, and higher disorder degree and more excellent electrochemical performance are obtained. The preparation method is low in raw material cost and simple in treatment process, and is a sodium ion battery negative electrode material with commercialization prospects.

The invention discloses a graphene-coated hard carbon negative electrode material and a preparation method thereof, and belongs to the technical field of hard carbon negative electrode materials. The preparation method of the graphene-coated hard carbon negative electrode material comprises the following steps: carrying out pretreatment and three-step soaking on coconut shells, carrying out biomass carbonization, mixing with a microbial suspension, and adsorbing to obtain a microbial adsorption type hard carbon material; and then carrying out surface treatment, chemical vapor deposition, impregnation, secondary chemical vapor deposition and annealing treatment on the microbial adsorption type hard carbon material to obtain the graphene coated hard carbon negative electrode material. The negative electrode material prepared by the method is high in first discharge capacity, high in first coulombic efficiency and good in cycle performance.

The invention relates to a preparation method of a biomass hard carbon negative electrode material and application of the biomass hard carbon negative electrode material in the field of energy storage. The method comprises the following steps: carrying out pretreatment, crushing and pre-carbonization treatment on a biomass raw material to obtain a pre-carbonized material; mixing and stirring the pre-carbonized material and an acid solution, washing and drying to obtain an acid-treated hard carbon material; soaking the obtained acid-treated hard carbon material in an alkaline solution, heating and stirring, washing and drying to obtain an alkali-treated hard carbon material; mixing the obtained alkali-treated hard carbon material with a pore-forming agent, carrying out ball milling, carrying out solid-liquid separation, and carrying out high-temperature carbonization and grinding on the obtained solid phase to obtain a powder sample; and mixing the obtained powder sample with hydrofluoric acid, and carrying out hydrothermal treatment to obtain the biomass hard carbon negative electrode material. The sodium ion battery prepared by taking the biomass hard carbon negative electrode material as a negative electrode material has the characteristics of high initial coulombic efficiency, high low-voltage platform specific capacity and excellent cycle performance and rate capability.

The invention discloses a preparation method of a high-entropy phosphide nanotube, which successfully prepares a nanotube phosphide with a high-entropy structure by adopting a hydrogen bond organic framework (HOF)-metal organic framework (MOF) template conversion method. In the preparation process of the material, a core-shell structure (HOF (MOF)) is firstly formed, the core gradually disappears through a diffusion mechanism, and finally, the material is converted into a hollow nanotube structure which is uniform and controllable in size. According to the hollow structure, the specific surface area is remarkably increased, more active sites are provided, the transmission path of reactant molecules is optimized, and the electro-catalytic performance is greatly improved. Besides, the overall tubular morphology of the material is uniform, the size is controllable, and compared with a traditional granular material, the specific surface area is remarkably increased, so that more reaction sites are exposed in the external environment, and the catalytic efficiency and the reaction rate of the material in an electro-catalytic reaction are greatly improved.

The invention discloses an inhibitor for copper-molybdenum separation and a preparation method and application thereof.The inhibitor is a grafted copolymer DG-1 obtained after chitosan and sodium thioglycolate are grafted, the selectivity of sulfydryl to copper ions is enhanced through the product, the adsorption effect on the copper ions is enhanced, and molybdenite is not affected; secondly, a carboxyl group of a grafted product points to ore pulp and has more active sites, so that the solubility and the stability of single chitosan or sodium thioglycolate are enhanced; a third step; the copolymer is relatively simple to prepare and easy to realize, and the economic cost for inhibiting the chalcopyrite is effectively reduced. The inhibitor is used for separating copper and molybdenum and is environmentally friendly, the dosage is relatively small, and the process is simple and efficient.

The invention discloses a nitrogen-doped carbon nanotube coated CoP / Co2P heterostructure electrocatalyst as well as a preparation method and application thereof, and belongs to the technical field of electrocatalytic materials. The preparation method comprises the following steps: by taking cobalt nitrate hexahydrate as a cobalt source and guanine as a carbon source and a nitrogen source, synthesizing a cobalt precursor by adopting a high-temperature carbonization method, then calcining the cobalt precursor to obtain a cobaltosic oxide precursor, and phosphating the cobaltosic oxide precursor to obtain the nitrogen-doped carbon nanotube coated CoP / Co2P heterostructure electrocatalyst. The catalyst has a relatively large specific surface area and multiple active sites, the specific surface area is 20-21m < 2 > / g, the pore size is distributed in a micropore-mesopore-macropore hierarchical pore structure, and the pore structure is mainly distributed in a range of 3-4nm. The preparation method of the catalyst comprises the following steps: (1) preparing a cobalt precursor; (2) preparing a cobaltosic oxide precursor; and (3) phosphating. The catalyst is high in catalytic reaction efficiency, and shows relatively good bifunctional activity and relatively strong stability in HER and OER.

The invention discloses a potassium-doped chain-shaped manganous-manganic oxide positive electrode material and a preparation method and application thereof, and belongs to the field of aqueous zinc ion batteries, and the preparation method comprises the following steps: preparing a mixed solution of isopropanol and deionized water; the preparation method comprises the following steps: under magnetic stirring, dissolving manganese acetate, potassium chloride and nitrilotriacetic acid into a mixed solution, and preparing K-Mn-NTA, namely a K-Mn-NCs precursor, through a hydrothermal method; then, K-Mn3O4-NCs is prepared through an annealing method; and finally, carrying out in-situ polymerization on polyaniline on the K-Mn3O4-NCs to obtain the K-Mn3O4-NCs coated PANI. When the positive electrode material is applied to the zinc ion battery, the cycle performance and the rate capability of the zinc ion battery can be improved, the conductivity of the positive electrode material is improved, the dissolution of Mn is inhibited, and the electrochemical performance of the zinc ion battery is improved.

The invention provides a preparation method of vitamin C, and belongs to the technical field of vitamin C. The preparation method comprises the following steps: preparing 2-keto-L-gulonic acid, preparing a catalyst and reacting. The preparation method of the catalyst comprises the following steps: carrying out water vapor treatment on a ZMS-5 molecular sieve, then putting the ZMS-5 molecular sieve into a calcining furnace, calcining at 500-520 DEG C for 3.5-5.0 h, naturally recovering to room temperature, putting the ZMS-5 molecular sieve into deionized water, adding gamma-polyglutamic acid and citric acid, uniformly stirring, filtering and drying to obtain a pretreated molecular sieve; the pretreated molecular sieve is put into a phosphoric acid solution to be soaked, drying is conducted after soaking is completed, and a catalyst is prepared; the vitamin C prepared by the preparation method disclosed by the invention is relatively high in purity and yield, and the 2-keto-L-gulonic acid prepared by fermentation is high in content and short in fermentation period.

The invention discloses a MoO2 / Mo2N composite material and a preparation method and application thereof.The MoO2 / Mo2N composite material is provided with a MoO2 and Mo2N mixed phase, the preparation method comprises the steps that a MoO3 precursor is placed in an open container, the open container is placed in an ammonia atmosphere to be subjected to calcination treatment, the MoO2 / Mo2N composite material is obtained, and the MoO2 / Mo2N composite material can be applied to photocatalytic CO2 reduction reaction. The method comprises the following steps: putting the composite material into a reactor with a quartz window, introducing a CO2 / H2O or CO2 / H2 mixed reactant, and reducing CO2 under an illumination condition. According to the invention, the problems of complex material synthesis process and high cost in the existing method are solved, and the synthesized MoO2 / Mo2N composite material is applied to photocatalytic CO2 reduction and has good reaction activity and stability.

The invention belongs to the technical field of battery negative electrode materials, and particularly relates to a phosphorus-based negative electrode material with a coating structure as well as a preparation method and application of the phosphorus-based negative electrode material. On the basis of the prior art, nano nickel phosphide, red phosphorus and carbon nanospheres are subjected to ball milling to prepare a main body phosphorus-based material, and then the main body phosphorus-based material is coated with a coating layer prepared from a nanofiber material, pyrrole and 5-azaindole, so that the coating layer of the phosphorus-based negative electrode material has elasticity, the volume expansion rate of the phosphorus negative electrode material is reduced, and the service life of the phosphorus negative electrode material is prolonged. According to the nickel phosphide-based negative electrode material and the preparation method thereof, the interface interaction between the phosphorus-based negative electrode material and the binder is enhanced, the prepared nickel phosphide grows on the black phosphorus nanosheet, so that the nickel phosphide has good dispersity, the nickel phosphide nanocrystals can be effectively prevented from being agglomerated, and the energy storage capacity of the nickel phosphide is improved; and after the 5-hydroxy vanillin is grafted, the adhesive has excellent wet adhesion resistance, and can prevent the dissolution of phosphorus element, so that the cycle efficiency of the electrode is improved.

The invention relates to a CO2 capture and utilization integrated bifunctional material as well as a preparation method and application thereof. The CO2 capture and utilization integrated bifunctional material comprises a mixture of an adsorbent and a catalyst in a mass ratio of 1: (0.5-1.5), the adsorbent is a calcium-based adsorbent or a calcium-based adsorbent doped with a metal oxide; the catalyst is chromium-based spinel doped with transition metal elements. The transition metal element is doped into the chromium-based spinel, so that the charge distribution can be changed, the number of ethane active sites can be increased, the activation reaction energy barrier of CO2 and ethane can be reduced, the oxidative dehydrogenation of ethane is facilitated, and the ethylene yield is good. According to the invention, harsh conditions such as high pressure or sealing are not needed, the preparation method is simple, toxic and harmful wastes are not generated in the production process, and the method is suitable for large-scale industrial production.

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 plastic products, and discloses a degradable automobile recycled plastic product and a preparation method thereof. According to the plastic product disclosed by the invention, degradable polylactic acid is taken as a main raw material, and automobile recycled plastic particles are added to reduce the utilization of polylactic acid, so that the environmental pollution caused by waste plastic particles is reduced through waste utilization, and the production cost is reduced; in the composite reinforcing agent, firstly, the three elements N, P and B have a synergistic effect to improve the flame retardant property of a matrix, meanwhile, the nanosheet with a layered structure is used for synergistic flame retardance to further improve the flame retardant property of the matrix, the nanosheet introduced into the composite reinforcing agent further has certain photocatalytic performance, macromolecular polymers can be catalytically degraded into micromolecular substances, and the flame retardant property of the matrix is further improved. The degradation rate of the matrix is improved. Therefore, the plastic product disclosed by the invention not only has excellent flame retardant property and degradability, but also reduces the production cost.

The invention discloses preparation of an amidoxime functionalized UiO-66-NH2 adsorbent, and belongs to the technical field of adsorbent preparation, and the preparation method comprises the following steps: S1, preparing a mixed solution I; s2, preparing a crude product I; (S3) preparing UiO-66-NH2 (UiO-66); s4, preparing a mixed solution II; s5, preparing a crude product II; s6, preparing UiO-66-CN (UiO-66-CN S7, preparing a mixed solution III; s8, preparing a crude product III; s9, UiO-66-AO, namely, an amidoxime functionalized UiO-66-NH2 adsorbent, is prepared, wherein the UiO-66-AO is used as a raw material; the invention also discloses an application of the amidoxime functionalized UiO-66-NH2 adsorbent, and the amidoxime functionalized UiO-66-NH2 adsorbent can be used for adsorbing The gallium ion adsorbent can adsorb gallium ions under both acid and alkali conditions, has higher stability under an alkali condition, has a very good adsorption effect on the gallium ions, and solves the problems in the prior art.

The invention belongs to the technical field of electrode materials, and particularly relates to a ZIF-derived CoZnS electrode material and a preparation method and application thereof. According to the preparation method, soluble cobalt salt and soluble zinc salt are taken as raw materials, NH4F is taken as a buffering agent and a structure-directing agent, urea is adopted to provide a weak base environment, a solvothermal reaction is adopted to prepare a foamed nickel-CoZn precursor, then coordination with the foamed nickel-CoZn precursor is carried out under the coordination effect of dimethylimidazole, conversion is carried out to ZIF, then a ZIF-67 structure is introduced, and the composite material is prepared. A ZIF-derived precursor is obtained, the vulcanization condition of the ZIF-derived precursor is controlled, and the ZIF-derived CoZnS electrode material is prepared. The ZIF-derived CoZnS electrode material has a uniform MOF structure and a three-dimensional array, provides sufficient active sites and a stable physical structure for a subsequent electro-catalytic hydrogen evolution reaction, and overcomes the technical defect of low catalytic site density in the prior art.

The invention belongs to the technical field of materials, and relates to a preparation method of a fluorinion-induced manganese oxide composite material and application of the fluorinion-induced manganese oxide composite material as a positive electrode material in an aqueous magnesium ion capacitor. The preparation method comprises the following steps: firstly, preparing a MnO2 precursor from a positive electrode through a hydrothermal method, and annealing to obtain a pure-phase MnO2 nanoflower structure; the preparation method comprises the following steps: preparing MnO2 nanoflowers, adding the prepared MnO2 nanoflowers into polyethylene glycol, adding manganese chloride, potassium fluoride and polyvinylpyrrolidone, carrying out ultrasonic dispersion for 30 minutes, continuously stirring for 1 hour, and transferring the obtained mixed solution into a Teflon reaction kettle for hydrothermal reaction to obtain the MnO2 / Mn2O3 / KMnF3 composite material. The composite material is used as a positive electrode and activated carbon is used as a negative electrode to assemble a water-based magnesium ion capacitor device, and the water-based magnesium ion capacitor device can reach relatively high specific capacitance after an electrochemical test. According to the invention, a hydrothermal method is adopted for synthesis, the process is simple, the material cost is low, and the material is non-toxic and harmless, so that the capacitor has high practical application value and is expected to become a novel green energy storage device.

The invention belongs to the technical field of materials, and particularly relates to a CuMn bimetallic nano-enzyme, a preparation method of portable hydrogel of the CuMn bimetallic nano-enzyme and application of the portable hydrogel in ascorbic acid detection. A preparation method of the portable hydrogel ball comprises the following steps: preparing a CuMn bimetallic nano-enzyme into a turbid liquid, ultrasonically dispersing sodium alginate into the CuMn bimetallic nano-enzyme turbid liquid, sucking sol by using a dropper, putting the sol into a tube cover of a plastic centrifugal tube, dropwise adding a calcium chloride solution, and continuously shaking to form the hydrogel ball. The CuMn bimetallic nano-enzyme material disclosed by the invention has rich active sites and a relatively large specific surface area, and the material has a relatively low detection limit on ascorbic acid detection. The hydrogel can immobilize the enzyme and can improve the catalytic activity and stability of the enzyme. The hydrogel has porosity and can promote molecular diffusion, and the hydrogel is very perfect as a substrate due to optical clarity. And the color change of the device can be combined with a smart phone to carry out on-site portable visual detection.

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 provides a coated modified precursor material and a preparation method thereof, a coated modified positive electrode material and a preparation method thereof, and a lithium ion battery. The coated and modified precursor material comprises a positive electrode material precursor and a composite material coated on at least part of the surface of the positive electrode material precursor, and the composite material is a composite material of KNbO3 and MoS2. The KNbO3 / MoS2 composite material has the characteristics of rapid ion transfer and high activity sites, and the positive electrode material coated with the composite material can improve the battery capacity, prolong the cycle life and the like of the lithium ion battery.

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 present invention belongs to the field of nanomaterials, and specifically discloses a folic acid-stabilized silver-platinum bimetallic quantum dot-based nanozyme FA@Ag‑Pt QDs, wherein the bimetallic core-shell quantum dot mimetic enzyme has the advantages of high catalytic efficiency, good stability, monodispersity and rapid separation, and exhibits good simulated peroxidase catalytic activity. The FA@Ag‑Pt QDs material is first reduced by fully mixing folic acid with silver ammonium ions through a simple "one-pot synthesis method", so that the two are controllably modified together through non-covalent self-assembly or coordination bonds, and then chloroplatinic acid is added to modify platinum on the surface of nanosilver particles to obtain the method, which is simple in steps, easy to operate, mild in reaction conditions, and suitable for large-scale production. The FA@Ag‑Pt QDs mimetic enzyme prepared by the present invention has good simulated peroxidase catalytic activity, and has great application value in the fields of environmental water, food, and medicine.

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.

The present invention discloses the preparation of a photoelectric integrated catalytic electrode and its application in the degradation of antiviral drug wastewater, and relates to the technical field of sewage purification and wastewater resource utilization. The composite catalytic electrode includes a CMO electrocatalytic electrode and a WCN photocatalytic electrode, a nickel foam is placed between the CMO electrocatalytic electrode and the WCN photocatalytic electrode to form a composite catalytic electrode with a sandwich structure; the CMO electrocatalytic electrode uses CuMn2O4 particles as a catalyst material and is prepared by electrodeposition and heat treatment; the WCN photocatalytic electrode is prepared by bonding sodium tungstate, melamine and formaldehyde to a substrate through PVP, and then drying and calcining. The composite catalytic electrode of the present invention is coupled with a photoelectric bio-Fenton reaction to achieve the effective removal of acyclovir in antiviral drug wastewater, and the removal rate of acyclovir in the difficult-to-degrade acyclovir wastewater reaches 100%.