60results about How to "High specific surface area" patented technology

The invention relates to a preparation method of a catalyst for preparing 1-hexyl methyl acetate by addition of n-heptene and acetic acid, which comprises the following steps: impregnating a carrier sulfonic acid group strong acid resin into a heteropoly acid solution, stirring at 20-50 DEG C for 8-24 hours, and controlling the mass ratio of the sulfonic acid group strong acid resin to the heteropoly acid solution to be (10: 1)-(1: 3); and after stirring, filtering, and drying a solid obtained after filtering at 80-140 DEG C to obtain a finished product. The invention also provides a synthetic method for synthesizing 1-hexyl methyl acetate by using the catalyst. The supported solid acid catalyst can be recycled from reaction slurry through simple liquid-solid separation means such as filtration and centrifugation, and good product selectivity can be obtained.

The application discloses a modified layered nanoclay sheet / polyurethane composite coating and a preparation method thereof, and belongs to the technical field of coatings; namely, the modified layered nanoclay sheet and polyurethane are used to prepare the modified layered nanoclay sheet / polyurethane composite coating by adopting a physical crosslinking method; wherein the modified layered nanoclay sheet is prepared by sequentially performing acid activation and surface modification treatment on nanoclay. The application solves the problems of insufficient weather resistance and adhesion and poor storage stability of the existing polyurethane coating, and also reduces the cost. In addition, the modified layered nanoclay sheet / polyurethane composite coating prepared by the application has excellent corrosion resistance and mechanical properties.

The invention discloses a process method for selective deep desulfurization and denitrification of aromatic-rich fractions. The process method comprises the following steps: (1) mixing aromatic-rich diesel oil with hydrogen, and then feeding the mixture into a pre-hydrogenation reaction zone I for pre-hydrogenation dealkene reaction; (2) a product obtained in the step (1) enters a hydrofining reaction zone II for a hydrofining desulfurization and denitrification reaction; (3) carrying out flash evaporation on the product obtained in the step (2) to separate recycle hydrogen, enabling the obtained refined diesel oil to enter a moving bed adsorption denitrification reaction zone III, and carrying out deep adsorption denitrification reaction on the refined diesel oil under the action of an adsorption denitrification agent to obtain a desulfurized and denitrified refined aromatic-rich diesel oil component; and (4) enabling the inactivated adsorption denitrification agent in the step (3) to enter an adsorbent regeneration area IV, and completing reduction and drying of the inactivated adsorption denitrification agent under the action of a desorption agent to obtain the cyclically regenerated adsorption denitrification agent. According to the process method, deep removal of the sulfur-containing nitrogen-containing compound can be realized, and the investment cost is also greatly reduced.

This invention provides a fiber-based biomimetic polyurethane artificial blood vessel and its preparation method. The method involves using wet spinning technology to obtain filaments, which are then drawn and wound onto the surface of a metal tube to form a polyurethane fiber inner layer. A fabric middle layer is woven onto the surface of the polyurethane fiber inner layer. An organic solvent is sprayed onto the surface of the fabric middle layer, and an outer polyurethane fiber layer is prepared on the fabric surface using electrospinning technology. Finally, after curing and demolding, the fiber-based biomimetic polyurethane artificial blood vessel is obtained. This invention combines wet spinning, weaving, and electrospinning technologies to achieve integrated preparation of polyurethane artificial blood vessels. The resulting artificial blood vessel is of high quality, with a tightly bonded three-layer fiber-based structure that maximally mimics the three-layer structure of natural blood vessels. The inner layer provides excellent compliance, the fabric layer increases the blood vessel's impermeability and sutureability, and the outer layer effectively prevents vascular delamination and promotes endothelialization. Furthermore, the preparation method is environmentally friendly and pollution-free, with a short process flow, making it suitable for continuous industrial production.

The invention provides aluminum fumarate and a synthesis method thereof. The synthesis method comprises the following steps: mixing organic aluminum, an organic carboxylic acid ligand and an alkaline substance in water according to a molar ratio of 1: (1.8-2.8): (1-8), and carrying out thermal reaction to obtain aluminum fumarate; wherein the organic carboxylic acid ligand is selected from one or a combination of more than two of fumaric acid, maleic acid and isophthalic acid. According to the synthesis method, organic aluminum is adopted, a large amount of heat can be released when the organic aluminum is decomposed in water, so that synthesis of aluminum fumarate is promoted, meanwhile, the decomposition process is beneficial to promotion of deprotonation of fumaric acid, reaction time is shortened, the dosage of alkaline substances is reduced, generated wastewater is closer to be neutral, cost is reduced, and the production scale is convenient to enlarge. The aluminum fumarate is of a staggered flower-shaped spherical structure, and the specific surface area of the aluminum fumarate is remarkably increased.

The application provides a porous spherical high-activity magnesium oxide and a preparation method thereof; the preparation method of the porous spherical high-activity magnesium oxide comprises the following steps: S1, obtaining a magnesium bicarbonate solution; S2, performing spray drying on the magnesium bicarbonate solution to obtain light magnesium carbonate solid powder, wherein the light magnesium carbonate solid powder has a hollow spherical structure; and S3, performing calcination on the light magnesium carbonate solid powder to obtain the porous spherical high-activity magnesium oxide. The high-activity magnesium oxide with a porous hollow spherical structure can be obtained, and the prepared magnesium oxide reaches the product standard of activity-180 in the standard HG / T 3928-2012 Industrial Active Light Magnesium.

The invention discloses a soft soil curing material with synergistic effect of waste concrete recycled micro powder and lime and a preparation method of the soft soil curing material, and belongs to the technical field of soft soil curing. The soft soil curing agent provided by the invention comprises calcium hydroxide and waste concrete recycled micro powder in a mass ratio of 3: 7, wherein the particle size of the waste concrete recycled micro powder is less than 0.16 mm. According to the invention, unhydrated cement particles and active SiO2, Al2O3 and other components contained in the waste concrete recycled micro powder are utilized, and a pozzolanic reaction is carried out under the alkaline excitation action of calcium hydroxide, so that a hydrate (such as C-S-H gel) with gelling property is generated in the solidified soft soil. Gelling substances generated in the curing process of the calcium hydroxide and the waste concrete recycled micro powder can effectively bond soil particles in the soft soil to fill pores and consume free water in the soft soil at the same time, so that the mechanical property of the cured soil is greatly improved.

The application discloses a kind of TiO2@Au / TS-1 catalyst preparation and its application in preparation methyl methacrylate, belong to catalytic synthesis technical field.The application is titanium-silicon molecular sieve as carrier and gold are loaded, and TiO2 is modified on catalyst, the intervention of titanium oxide, gold particle is more stable, and it plays a protective role to gold particle, and the carrier TS-1 and gold particle are modified, the interaction between gold and TiO2 is regulated, the gold-based catalyst prepared is placed into reactor, and the mixed solution of methanol and methyl methacrylaldehyde with mass concentration of 45-80% is added, oxygen is introduced into the bottom of reactor, oxidation esterification reaction occurs at 70-160 DEG C, 0.5-2MPa, and methyl methacrylate is prepared.The efficient gold-based catalyst prepared by the application significantly improves the conversion rate of methyl methacrylaldehyde and the selectivity of methyl methacrylate.

This invention relates to the field of new materials and electrochemical energy storage materials, and discloses a polyimide-derived hierarchical porous carbon / carbon fiber composite electrode and its preparation method. The preparation method involves using carbon fiber felt as a substrate, and constructing a three-level interconnected structure of micropores, mesopores, and macropores through polyimide solution spraying, metal-organic gel template deposition, gradient carbonization, and eutectic activation processes. This invention, through template synergy and optimized activation processes, enables the constructed composite electrode to possess a unique three-level interconnected structure of micropores, mesopores, and macropores, solving the problems of limited mass transfer and insufficient active sites in traditional carbon electrodes. It can be widely applied to all-vanadium, iron-chromium, and organic flow batteries, and has significant industrial application value.

The application relates to the technical field of wastewater denitrification, and discloses a composite carrier as well as a preparation method and application thereof. The composite carrier comprises porous molybdenum disulfide, the porous structure of the molybdenum disulfide in-situ grows zirconium metal organic frameworks, and the surface of the molybdenum disulfide is loaded with graphene. The composite carrier can not only serve as a place for denitrification of microorganisms, but also can improve the denitrification efficiency of the microorganisms.

This invention discloses a lanthanum-based perovskite-supported noble metal catalyst, its preparation method, and its application in the catalytic oxidation of low-carbon alkanes. The invention involves dissolving lanthanum salt, manganese salt, and citric acid in an organic solvent to prepare a metal cation solution, which is then stirred to obtain a sol. After standing, a wet gel is obtained; this gel is dried and heat-treated to obtain lanthanum-based perovskite. A non-noble metal salt is dissolved in an acidic potassium permanganate solution to prepare a mixed solution. The lanthanum-based perovskite is dispersed in the mixed solution, heated, filtered, washed, and heat-treated. The pretreated lanthanum-based perovskite is dispersed in a noble metal salt solution, allowed to stand, dried, and heat-treated to obtain the target catalyst. This invention introduces active components in situ through acidic potassium permanganate pretreatment, resulting in a high specific surface area and highly active support, improving the dispersion of noble metals and promoting the interaction between noble metals and the support. The catalyst of this invention exhibits excellent catalytic combustion performance for low-carbon alkanes such as ethane and propane, and strong thermal stability.

The present application relates to the technical field of electrochemical analysis detection, and particularly relates to a modified glassy carbon electrode for sensitive detection of tert-butyl hydroquinone, a preparation method and application, which has a high specific surface area and catalytic activity, and has good conductivity, and can realize sensitive detection of tert-butyl hydroquinone, the modified glassy carbon electrode comprises a glassy carbon electrode and a composite coating, the composite coating is wrapped on the surface of the glassy carbon electrode, and the composite coating is composed of graphene oxide and a Ti-based MOF derivative; the preparation method comprises the following steps: (1) preparation of MIL-125 (Ti); (2) preparation of TiO2 / NC; (3) preparation of 15% GO@TiO2 / NC; (4) preparation of a 15% GO@TiO2 / NC composite material dispersion liquid; (5) preparation of a modified electrode; and the application comprises the following steps: S1, establishing a concentration-electrochemical response signal relationship; S2, determining the concentration of a to-be-detected substance.

The invention relates to the technical field of coal chemical industry, in particular to a method for treating a gasified filter cake, which comprises the following steps: (A) extruding and dehydrating the filter cake; (B) heating and dehydrating the filter cake subjected to extrusion dehydration; (C) crushing the heated and dehydrated filter cake to form filter cake particles; and (D) feeding the filter cake particles into a combustion system (5), introducing combustion-supporting gas and combustible gas into the combustion system (5), and igniting the combustion system (5), so that the filter cake particles are subjected to methanation reaction in an environment with the temperature of 550-650 DEG C and the pressure of 0.5-0.7 MPa to generate waste ash and process gas. In addition, the invention also provides a system for implementing the method for treating the gasified filter cake. According to the method for treating the gasified filter cake, the dehydration effect on the filter cake is good, combustion is more sufficient, energy consumption is reduced, and sustainable utilization of resources is promoted.

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.

This invention belongs to the field of inorganic non-metallic adsorbent materials, specifically relating to a composite molecular sieve material, its preparation method, and its application. The composite molecular sieve material includes a metal-loaded ZSM-5 molecular sieve, a metal-loaded high-silica Y-type molecular sieve, and a metal-loaded modified zeolite. The mass percentage of the loaded metal is 0.1%–5%, and the mass ratio of the metal-loaded ZSM-5 molecular sieve, the metal-loaded high-silica Y-type molecular sieve, and the metal-loaded modified zeolite is 1:1–2:0.5–2. The composite molecular sieve material provided by this invention involves metal loading of ZSM-5 molecular sieve, high-silica Y-type molecular sieve, and modified zeolite, followed by mixing, extrusion molding, or spraying or coating onto a carrier. The multiple metal-loaded molecular sieves in the composite molecular sieve material interact and work together to remove various air pollutants. The molecular sieve structure and the loaded carrier can reduce wind resistance and improve material performance in practical applications.

This invention belongs to the field of ecological restoration and soil moisture regulation in arid areas, and relates to a biomass-based porous carbon material, its preparation method, and its application. The preparation method of the biomass-based porous carbon material includes the following steps: S1: Pre-treating crushed herbaceous fiber plant stem biomass to obtain pre-treated biomass. S2: Dehydrating the pre-treated biomass to obtain dehydrated biomass. S3: Carbonizing the dehydrated biomass to obtain a porous carbon skeleton. S4: Activating the porous carbon skeleton in a calcium hydroxide solution to obtain a porous carbon material with micropores, mesopores, and macropores. This invention, through the synergistic effect of four core steps—pre-treatment, dehydration, carbonization, and activation—constructs a multi-level interconnected pore structure composed of micropores, mesopores, and flow-conducting macropores while maintaining the natural fibrous vascular structure of herbaceous biomass. The specific surface area is increased by 600-800% compared to carbonized materials alone, while maintaining a water absorption rate of 150-300%.

The application provides a method for improving hydrogen adsorption performance of a covalent organic framework material, comprising the following steps: providing a covalent organic framework material containing an imine bond, and placing the covalent organic framework material in hydrochloric acid vapor for protonation treatment; the application also provides a protonated covalent organic framework material and a use of the protonated covalent organic framework material as a hydrogen storage medium.

This invention relates to a plasma generator based on a dense microporous material catalysis, belonging to the field of low-temperature plasma technology. The plasma generator contains at least one discharge unit, which includes a first electrode, a microporous ceramic medium, and a second electrode. The first electrode is used to connect to a power source, and the second electrode is used for grounding. The microporous ceramic medium is used to adsorb gas molecules and active particles generated by the plasma discharge. This invention generates micro-discharge in a dense microporous medium, which has an extremely high specific surface area. When gas passes through, it is adsorbed onto the surface of the micropores in the medium. Similarly, active substances in the plasma are adsorbed onto the surface of the micropores in the medium. This improves the contact efficiency between short-lived, highly active particles and free radicals in the plasma and the reactants, promotes surface catalytic reactions, and improves the overall efficiency of the device.

The invention discloses a preparation method and application of a bentonite-based adsorption material for sewage treatment, and belongs to the technical field of bentonite adsorption materials. The preparation method comprises the following steps: adding tannic acid and quercetin into deionized water, and uniformly stirring to obtain a composite solution; and uniformly mixing the modified bentonite and the modified activated carbon, adding the mixture into the composite solution, performing ultrasonic treatment, standing at room temperature, and performing suction filtration, washing, drying and grinding to obtain the bentonite-based adsorption material for sewage treatment. The bentonite is firstly modified, more active sites are introduced, the interlayer spacing is enlarged, and the specific surface area, the dispersity and the stability are improved, so that the adsorption performance of the bentonite is effectively improved. Then the modified bentonite and the modified activated carbon are mixed and then placed in a mixed solution of tannic acid and quercetin to be treated, and the adsorption performance of the material on heavy metal ions and organic pollutants is further enhanced.

The invention provides pseudo-boehmite with high specific surface area and large pore volume, a preparation method thereof and a hydrogenation catalyst.The preparation method comprises the steps that an excessive NaOH solution and associated aluminum ore are mixed and boiled, aluminum hydroxide is leached out, and a sodium metaaluminate solution containing impurities is obtained; mixing the sodium metaaluminate solution containing the impurities with a precipitant to precipitate the impurities so as to obtain a sodium metaaluminate purified solution; mixing sulfuric acid and the sodium metaaluminate purified liquid, and reacting to obtain turbid liquid containing pseudo-boehmite; mixing the turbid liquid containing the pseudo-boehmite with hydroxyl carboxylate to enable the pseudo-boehmite to be electronegative, so as to obtain an electronegative pseudo-boehmite turbid liquid; and mixing the electropositive aluminum ions and the electronegative pseudo-boehmite suspension to obtain the pseudo-boehmite with high specific surface area and large pore volume. The low-cost hydrogenation catalyst prepared from the pseudo-boehmite with high specific surface area and large pore volume has the characteristics of high specific surface area and large pore volume, has higher catalytic activity, contains more impurities, and has stronger market competitiveness.

The invention discloses an iridium alloy nanowire catalyst as well as a preparation method and application thereof. The iridium alloy nanowire catalyst comprises an active component and a carrier, the active component is a metal alloy Ir-M; the carrier is a conductive carrier; m is selected from one or more of manganese, iron, cobalt, nickel, copper and zinc; wherein the morphological structure of the metal alloy Ir-M is a wormlike multilayer nanowire. According to the iridium alloy nanowire catalyst provided by the invention, the dosage of noble metal Ir can be reduced, the cost of the catalyst is reduced, and the electrochemical performance and corrosion resistance of the catalyst are also improved.

The invention relates to the technical field of carbon material preparation and modification, in particular to a preparation method of conductive carbon black with high specific surface area. The preparation method provided by the invention comprises the following steps: under a protective atmosphere, heating a raw material carbon black to 350-550 DEG C for first heat treatment, then heating to 800-950 DEG C for second heat treatment, and continuously heating to 1300-1600 DEG C for third heat treatment to obtain intermediate carbon black; sequentially carrying out water vapor activation and carbon dioxide activation on the intermediate carbon black to obtain the conductive carbon black with high specific surface area, the temperature of water vapor activation is 850 to 950 DEG C; the activation temperature of the carbon dioxide is 900 to 1000 DEG C. Impurities are removed through gradient heat treatment, a carbon skeleton is rearranged, and then water vapor and CO2 physical activation are utilized to cooperatively regulate and control micropore and mesoporous structures, so that the high specific surface area and the high conductivity are taken into account.

The application discloses a kind of amidoxime materials and its preparation method and application, belong to heavy metal adsorption material field.Amidoxime material in the application is prepared by Schiff base reaction, addition reaction and metal loading, catalyst and regulator need to be added in the process of Schiff base reaction to form specific morphology in preparation process, and monomer in the process of addition reaction also needs to have cyano and mercapto simultaneously, to provide fixed basis for subsequent metal loading process and respond to heavy metal to be adsorbed.Amidoxime group in the amidoxime material in the application has strong multidentate coordination ability, can adsorb heavy metal ions, and reducing agent used in the process of metal loading can reduce heavy metal ions, so that the amidoxime material has adsorption and reduction performance simultaneously.

The invention discloses high-specific-surface-area porous carbon based on coal gasification carbon residues and a preparation method and application thereof.The method comprises the steps that coal gasification residues serve as raw materials and are treated to obtain a carbon-rich precursor, and the carbon-rich precursor is carbonized to obtain a coal gasification residue-based hard carbon matrix; then, the hard carbon matrix is in contact with a modified solution containing hydrogen peroxide, synergistic pore-forming agents such as an inorganic gas generating type pore-forming agent, an organic small molecule pore-forming agent and a soft and hard template pore-forming agent can be further added into the modified solution, and selective oxidation etching and gas-phase pore-forming are carried out under the conditions of controlled temperature, time and pH; a multi-scale micropore and mesopore structure is formed; and washing, drying and re-carbonizing or thermally annealing to obtain the coal gasification slag-based hard carbon material with high specific surface area. Compared with unmodified hard carbon, the method has the advantages that the specific surface area can be obviously increased, micropores and mesopores are synergistically developed, electrolyte infiltration and an ion transmission channel are obviously improved, and controllable construction of a multistage pore channel can be realized on the premise of ensuring relatively high yield and structural stability.

The present application belongs to the technical field of oil and gas exploitation, and relates to a nano desorption agent for gas well and a preparation method thereof. The desorption agent uses special pretreated biochar as a core carrier, loads specific proportion of bimetallic oxide nanoparticles, and is supplemented with an environmentally friendly surfactant for surface modification. Through the synergistic effect of nano size effect, catalysis / electron transfer effect of metal oxide, physical adsorption and pore transport effect of biochar, and interfacial tension reduction effect of surfactant, the adsorption energy barrier of gas molecules such as methane on the rock surface is significantly reduced, and the efficient desorption is promoted. At the same time, all components and preparation processes are environmentally friendly and harmless to human body.

This invention relates to a bifunctional electrocatalytic self-supporting electrode based on filter paper and its preparation method, belonging to the field of electrocatalysis technology. The preparation method consists of the following steps: (1) weighing nickel sulfate and cobalt sulfate and dissolving them in deionized water; (2) dissolving sodium citrate and sodium hypophosphite in deionized water respectively, and then adding them sequentially to the solution obtained in step (1); (3) adjusting the pH of the solution obtained in step (2); (4) cutting the filter paper; (5) preparing a sodium hydroxide solution; (6) placing the cut filter paper in a water bath in the solution prepared in step (5); (7) weighing palladium chloride and sodium borohydride and dissolving them in deionized water at room temperature; (8) activating and then reducing the filter paper in step (6); (9) placing the filter paper obtained in step (8) in a water bath in the solution obtained in step (3) and drying it. This invention reduces overpotential, decreases relative energy consumption, increases catalytic activity, and improves catalyst stability.

The invention relates to a walnut-based fragrance-carrying granular material with slow release performance and a preparation method and application thereof, and the preparation method comprises the following steps: (1) carrying out microwave treatment on a walnut shell crushed material to obtain a modified walnut shell crushed material; (2) mixing the crushed walnut shells with liquid essence, and carrying out adsorption treatment to obtain fragrant walnut shell particles; and (3) carrying out film coating treatment on the fragrance-carrying walnut shell particles by using a film forming solution, and then drying and screening to obtain the walnut-based fragrance-carrying particle material with the slow-release performance. According to the invention, by virtue of a three-step synergistic technology of microwave modification, adsorption fragrance carrying and film coating, high adsorption, high stability and slow release performance which are difficult to achieve by a common natural fragrance carrying material are realized, and the composite material is suitable for multiple fields of foods, tobaccos, daily chemicals and the like.

The application relates to the technical field of new materials, and provides a preparation method of a flexible anti-icing / deicing coating fabric, which comprises the following steps: preparing a carbon precursor solution, adding a proper amount of a surfactant and a template material which can be removed later, carrying out hydrothermal reaction for a period of time, filtering, washing, drying, placing the obtained solid powder in a tubular furnace to carry out high-temperature pyrolysis, and obtaining hollow carbon material; taking an adhesive and a curing agent, coating the adhesive and the curing agent on the surface of the fabric, and curing to obtain a pretreated fabric; preparing a hollow carbon material suspension dispersion liquid, uniformly spraying the hollow carbon material suspension dispersion liquid on the surface of the pretreated fabric, and curing to obtain the flexible anti-icing / deicing coating fabric. The application adopts a textile material as a base, adopts the hollow carbon material with high specific surface area and low density as a photothermal matrix, has good hydrophobic effect, and has the advantages of passive anti-icing and active photothermal deicing. The carbon coating fabric has the advantages of superhydrophobicity, photothermal effect, good durability, strong adhesion, recyclable multiple use, high service life and environmental protection.

The application relates to the technical field of hydrogen production by water electrolysis of a proton exchange membrane, and discloses a preparation method of a multistage microstructure PEM water electrolysis hydrogen production membrane electrode, which comprises four core steps of micron-level array printing aluminum foil preparation, nanostructure framework construction, catalyst loading and hot-pressing transfer printing film formation. The micron-level grid printing structure is combined with a bismuth oxide nanostructure framework to form a multistage microstructure catalyst carrier, so that the specific surface area of the membrane electrode is greatly improved; the catalyst is loaded by adopting a magnetron sputtering method, the combination strength of the catalyst and the carrier is enhanced, the amount of noble metal is reduced, and meanwhile, the carrier and the proton exchange membrane are efficiently combined through a transfer printing process. The prepared membrane electrode has a voltage as low as 1.6-1.8 V under a current density of 1 A / cm, the specific surface area is 1.5-2 times that of a traditional ordered nanostructure membrane electrode, the catalyst utilization rate is higher than 95%, the voltage does not obviously increase after continuous work for 6000 hours, the preparation process is compatible with conventional equipment, and the industrialized mass production is feasible.

The invention discloses an S-type heterojunction photocatalyst of FMO (at) F and M-ZIS as well as a preparation method and application of the S-type heterojunction photocatalyst. According to the invention, the S-type heterojunction photocatalyst of Fe and Mo co-doped ZnIn2S4 coated FeMoO4 (FMO (at) F and M-ZIS) can be prepared without using a template agent and a surfactant. The catalyst can take tetracycline hydrochloride as a pollutant (40 ppm), the degradation efficiency of the catalyst can reach 100% under a 10 W LED lamp for 20 min, and the degradation rates of high performance liquid chromatography and three-dimensional fluorescence detection are 100% and 97.4% respectively.