2207results about How to "Improve catalytic performance" patented technology

The invention discloses an alkaline electrolytic water hydrogen evolution electrode, a preparation method thereof and an electrolytic bath based on the electrode. The electrode comprises a nickel net base material, raney nickel located on the nickel net base material and a catalytic layer which is electrochemically deposited on the surface of the raney nickel to cover a zigzag edge to form a smooth surface. The catalytic layer is a platinum catalytic layer, a nickel-sulfur alloy catalytic layer, a nickel-cobalt-zinc layer or a nickel-iron-zinc layer, and an electroplate liquid for electrochemical deposition comprises sulfosalicylic acid. According to the electrolytic cell, an alkaline electrolytic water hydrogen evolution electrode is used as a cathode, and Raney nickel / nickel net is used as an anode. According to the alkaline electrolytic water hydrogen evolution electrode, the catalyst layer which is high in binding force with the base material is deposited on the Raney nickel / nickel net base material in a specific electrochemical deposition mode, and the catalyst layer can effectively cover the sawtooth-shaped edge of the surface of the electrode and keep a part of the original high-specific-surface-surface structure of Raney nickel at the same time; the catalytic performance of the electrode is improved, and the overpotential of the electrode under 100mA / cm < 2 > can be lower than 241mV.

The invention provides a redox imidazole covalent organic framework material as well as a preparation method and application thereof, belongs to the technical field of material preparation and photocatalytic preparation of hydrogen peroxide, and aims to solve the technical problem of low activity of a current covalent organic framework in preparation of hydrogen peroxide. The preparation method of the imidazole-connected redox type imidazole covalent organic framework material comprises the following steps: respectively reacting a reactant 2, 7-di-tert-butylpyrene-4, 5, 9, 10-tetraketone monomer with 4, 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ' The preparation method comprises the following steps: mixing 4, 4 '-(pyridine-2, 4, 6-triyl) tribenzaldehyde and a tri (4-formylphenyl) amine monomer, adding a solvent and a catalyst, uniformly stirring, and reacting to obtain the redox type imidazole covalent organic framework material after the reaction is finished. The application comprises the following steps: adding the covalent organic framework, oxygen and the sacrificial agent into water, and reacting under the irradiation of visible light. The preparation method is green, environment-friendly, simple and easy to implement, the prepared material has good thermal stability, and efficient visible light photocatalysis preparation of hydrogen peroxide can be achieved; meanwhile, the catalyst can be recycled and has good photocatalytic stability.

The invention relates to a catalyst for ethylene oxide ring-opening polymerization and a preparation method thereof, and belongs to the technical field of high polymer material synthesis, and the catalyst is a composite structure based on a silicon dioxide nanoparticle loaded bimetal organic complex; a modified nitrogen-containing polydentate ligand is prepared by adopting a special method, is coordinated with metal ions through covalent bonds and is loaded on silicon dioxide nanoparticles; by utilizing the high dispersity and stability of the silicon dioxide nanoparticles and the synergistic catalytic effect of the bimetal organic complex, the catalytic effect is effectively improved, the polymerization process is accelerated, the polymerization stability is enhanced, the polymerization molecular weight is improved, and the distribution is narrow.

The invention discloses a tyrosine phenol lyase mutant and application of the tyrosine phenol lyase mutant in synthesis of a tyrosine derivative. The mutant is obtained by performing single mutation or multiple mutation on the 18th site or the 417th site of an amino acid sequence shown in SEQ ID NO.2. Compared with a wild type, the tyrosine phenol lyase mutant provided by the invention has more excellent enzyme activity and more excellent catalytic performance. According to the TPL mutant, the cumulative concentration for synthesizing levodopa is up to 160 g / L or above, the cumulative concentration for synthesizing L-tyrosine is up to 80 g / L or above, the cumulative concentration for synthesizing 3, 4, 5-TOPA is up to 16.4 g / L or above, the cumulative concentration for synthesizing 3-fluoro-L-tyrosine is up to 33.1 g / L or above, the cumulative concentration for synthesizing 2-fluoro-L-tyrosine is up to 20.5 g / L or above, and the optical purity is greater than 99.9%.

The invention relates to the technical field of energy materials, and discloses a self-assembled low-crystallization nanoflower-shaped polyoxometallate catalyst and a preparation method and application thereof.The preparation method comprises the steps that firstly, cobalt nitrate hexahydrate, iron nitrate nonahydrate, CH4N2O and Finke Co are used as raw materials, Finke Co and Fe < 3 + > are grown on nickel foam in situ, then the Finke Co and Fe < 3 + > react with ZIF-67 (Co), and a Finke Co-FeCoNi precursor with a stable structure is prepared; finally, the precursor is subjected to vulcanization, and the nano flower-shaped polyoxometallate catalyst Finke Co-FeCoNi / S is obtained. According to the preparation method, Finke Co is added, so that the crystallinity of the catalyst material is reduced, the catalyst material is assembled into a nanoflower-shaped structure, the low crystallinity can provide more coordinated unsaturated sites and improve the conductivity, and the nanoflower-shaped form exposes more defect sites, so that the reaction contact area is increased, and the catalytic activity is improved.

The invention discloses a Fe-MOF derivative / biochar nano composite material as well as a preparation method and application thereof, and belongs to the field of degradation of organic pollutants in a water body. The invention aims to solve the problems of unstable structure, easy agglomeration and the like at high temperature. The preparation method comprises the following steps: by taking an Fe-MOF derivative as a precursor and charcoal as a carrier material, carrying out in-situ synthesis on Fe-MOF, and carrying out high-temperature calcination on the surface of charcoal (BC). The metal carbon-based composite material prepared by the method shows excellent catalytic performance in catalytic degradation of tetracycline in a water body. Meanwhile, the prepared multiphase composite catalytic material has good stability and cycle performance.

The invention provides a low-cost metal modified electrode material, a preparation method and application, solves the problems that a carbon nitride material is difficult to recover and poor in sustainability, and improves the photoelectrocatalysis capability of an active carbon material. Further constructing a packed bed cathode coupled microbial fuel cell system; the treated industrial wastewater is high-salt coking wastewater from Anshan steel, a PEC-MFC system filled with electrogenesis microorganisms is used for realizing wastewater recycling and harmlessness, and energy-saving, high-efficiency and one-step treatment of the industrial wastewater is completed.

The invention discloses a molecular sieve confinement platinum-based catalyst and application thereof in catalysis of waste plastics, the Pt-coated Hie-TS-1 catalyst is prepared through hydrothermal synthesis, the catalyst has a hierarchical structure, the contact area between the catalyst and polyethylene plastics is increased, the hydrocracking rate is increased, the pore channel selectivity for polyolefin is achieved, and the molecular sieve confinement platinum-based catalyst can be used for catalyzing the polyethylene plastics. Catalytic products are distributed and diverted to narrow distribution, alkane and olefin intermediates are selectively filtered in Pt-Hie-TS-1 according to the length and the size, the shape selectivity of C5-C7 olefins is adjusted, the selectivity of C5-C9 hydrocarbons reaches 94.9%, and the use amount of Pt can be reduced to 0.4; the obtained product has the highest liquid oil content, the total amount of liquid oil can reach 93.5%, and the catalytic effect is the best.

The invention relates to a preparation method of a three-dimensional ferrocobalt metal oxide oxygen evolution catalyst. According to the method, foamed nickel is selected as a carrier, the foamed nickel is pretreated, a metal ion and ethanol mixed solution is evenly adsorbed to the surface of the foamed nickel, then open fire ignition is carried out, and a second-level self-limiting combustion process is carried out, so that metal ions form a ferrocobalt metal oxide material with a three-dimensional network structure in situ on the surface of the foamed nickel. The method is simple and easy to implement, a target product can be generated within second-level time, and the area of a foamed nickel matrix is adjusted according to needs, so that the three-dimensional ferrocobalt metal oxide catalyst is prepared on a large scale. The material obtained by the invention is used as an oxygen evolution anode catalyst, and the three-dimensional network-shaped ferrocobalt metal oxide oxygen evolution catalyst shows excellent electrochemical performance.

The invention relates to the technical field of catalysts for gas purification, in particular to a hierarchical pore metal-based catalytic adsorbent as well as a preparation method and application thereof. The invention discloses an integrated preparation method combining a sol-gel method and a template method, which comprises the following steps of: adding a template agent before forming gel, adding a proper amount of ammonia water in an aging process, accurately controlling other reaction conditions and a raw material ratio, and controlling a spatial confinement effect of the template method and a chemical reaction in a sol-gel process to obtain a sol-gel composite material. The morphology and size of the catalytic adsorbent can be accurately regulated and controlled, the hierarchical pore metal-based catalytic adsorbent with a microporous structure as a main material and mesopores and macropores as coexistence is finally prepared, the hierarchical pore structure provides rich adsorption sites and catalytic activity centers, and the hierarchical pore metal-based catalytic adsorbent has high adsorption capacity, high selectivity, good catalytic activity, good stability and easy regeneration.

The invention discloses a P450 mutant and application thereof in synthesis of calcifediol, and belongs to the technical field of bioengineering. According to the present invention, the P450 enzyme mutant enzyme is constructed, and the single plasmid three-enzyme co-expression system of the redox partner and the cofactor cycle enzyme is constructed, such that the sufficient electron transport chain is provided for the P450 enzyme, and the calcifediol can be efficiently synthesized under the mild condition by using the vitamin D3 as the substrate; the conversion rate of calcifediol can reach 63.1%, and the conversion rate of the reaction is greatly improved. By adopting the method disclosed by the invention, the catalytic efficiency of the catalyst is improved, and the reaction cost is reduced.

The invention discloses a high-entropy perovskite oxide catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The chemical general formula of the high-entropy perovskite oxide catalyst is La (MMN) O3, and M is a transition metal element with high electronegativity. M is a mixture of Ni, Cu, Co and Fe elements. The molar ratio of La to Ni to Cu to Co to Fe to Mn is (0.9 to 1): (0.15 to 0.25): (0.15 to 0.25): (0.15 to 0.25): (0.15 to 0.25): (0.15 to 0.25): (0.15 to 0.25). The La (MMN) O3 catalyst is of a rod-shaped structure formed by stacking particles. According to the high-entropy perovskite oxide catalyst as well as the preparation method and the application thereof, the B site of perovskite is doped by the high-electronegativity transition metal element, so that the Mn-O covalence is enhanced, and the catalytic performance is improved; the catalyst is prepared in an electrostatic spinning and calcining mode, a rod-shaped structure with accumulated nano-particles is obtained, the surface area of the catalyst is increased, and the catalytic effect is improved.

The invention relates to the technical field of nano catalytic materials, in particular to a preparation method and application of a nano bowl-shaped molybdenum-doped metal cobalt phosphide catalyst. The preparation method comprises the following steps: S1, preparing CoMo-MOF; S2, preparing Mo-CoP; according to the application method, the nanometer bowl-shaped molybdenum-doped metal cobalt phosphide catalyst is applied to the process of catalyzing water electrolysis hydrogen absorption and oxygen absorption reaction. According to the preparation method, the Mo-doped metal organic framework is adopted as a precursor, the target catalyst is prepared through phosphating and calcining, due to the fact that the valence state of Co in cobalt phosphide is improved through molybdenum doping, the intrinsic catalytic activity of the catalyst is improved, and electrolysis of water can be effectively catalyzed.

The invention discloses a hydrogen evolution electrode for an AEM electrolytic cell cathode and a preparation method thereof, the electrode sequentially comprises a substrate net, a metal bottom layer and a catalyst layer, the substrate net is selected from a stainless steel net or a nickel net, the metal bottom layer is formed on the substrate net through physical vapor deposition, and the material is selected from Ni, Ti, alloys thereof or oxides thereof; the catalytic layer is deposited on the metal bottom layer through physical vapor deposition and sequentially comprises a catalytic bottom layer, a catalytic middle layer and a catalytic outer layer, and the porosity is gradually increased. The preparation method comprises the following steps: roughening the acid etching surface of a substrate net, forming a metal bottom layer on the substrate net through physical vapor deposition, sequentially forming a catalytic bottom layer, a catalytic middle layer and a catalytic outer layer on the surface of the metal bottom layer through physical vapor deposition to obtain a catalytic layer, and performing post-treatment on the catalytic layer through plasmas doped with elements to form a porous network structure. And the corrosion resistance and the catalytic effect of the AEM electrolytic cell cathode in an alkaline environment are greatly improved.

The invention discloses a bifunctional CoCu catalyst, a preparation method thereof and application of the bifunctional CoCu catalyst in sulfur and ammonia production. A Cu-doped CoOOH bifunctional electrocatalyst is synthesized on foam cobalt (CF) through an in-situ growth method and is used for a cathode NO3RR and an anode SOR at the same time. In a sulfur oxidation reaction, the cobalt-based catalyst can effectively oxidize sulfur or a compound thereof into a substance with a higher valence state, such as sulfate, so that removal and conversion of sulfur are realized. In addition, due to low cost and environmental friendliness of the catalyst, the catalyst has great application potential in the aspect of electrochemical coupling treatment of sulfur and nitrate pollutants. Therefore, the invention designs a bifunctional electrocatalyst capable of simultaneously exerting the advantages of Cu-based and cobalt-based catalysts, and is expected to realize efficient electrochemical coupling treatment of sulfur and nitrate.

The invention discloses gold-titanium alloy nanoparticles as well as a wet chemical preparation method and application thereof. The preparation method comprises the following steps: in a water-free and oxygen-free environment, uniformly dissolving a gold salt, a titanium salt and a support carrier in an ether solvent, mixing with lithium triethylborohydride, transferring into a high-pressure reaction kettle, stirring and heating to 180-220 DEG C under the inert gas pressure of 0.5-1 MPa, and keeping the temperature for 1-4 hours; and after the mixture is cooled to the room temperature, the product solution is diluted with normal hexane, cleaning and drying are conducted, and the gold-titanium alloy nanoparticles are obtained. According to the invention, gold salt and titanium salt adsorbed on a support carrier are reduced by using a strong reducing agent under the conditions of high temperature and high pressure, and highly dispersed nanoparticles with uniform particle size are prepared; by introducing the supporting carrier, the problem that the particle size is increased due to agglomeration of alloy nanoparticles at high temperature is avoided, the catalytic performance and the anti-sintering performance of the catalyst are enhanced through strong interaction with the carrier, and the catalyst has wide application prospects in the fields of CO thermal oxidation and CO electrochemical oxidation.

The invention relates to a catalyst for synthesizing ortho-cresol as well as a preparation method and application of the catalyst. The molar ratio of Zn element to Al element in the metal spinel catalyst ZnAl2O4 is 1: (0.25-16), and the preparation method comprises the following steps: uniformly mixing aluminum nitrate nonahydrate and zinc nitrate hexahydrate in deionized water, stirring, adding a precipitator, and adjusting the pH value of the solution to form a precipitate dispersion liquid; and aging the precipitate dispersion liquid, carrying out suction filtration on the suspension liquid, washing, drying, and calcining to obtain the catalyst. Compared with the prior art, the catalyst disclosed by the invention is high in activity, simple to prepare, non-toxic, good in stability, long in service life, suitable for synthesizing o-cresol and 2, 6-xylenol through reaction of phenol and methanol, good in ortho-selectivity and few in by-products.

The invention belongs to the field of hydrogen production through water electrolysis, and particularly relates to a method for improving the self-reconstruction degree of a water electrolysis catalyst through assistance of a magnetic field, the prepared catalyst and application of the catalyst. The method comprises the following steps: 1) adding a solvent into ferrous salt, cobalt salt, sodium salt, a nitrogen compound and an organic metal compound, and uniformly mixing to obtain a hydrothermal reaction medium; (2) cutting, cleaning and drying a base material, immersing the base material in a hydrothermal reaction medium, carrying out hydrothermal reaction, and cleaning and drying to obtain an electrode plate; 3) assembling the electrode plates into an electrolytic tank, and performing magnetic field-assisted activation to obtain the electrolyzed water catalyst electrode material with high self-reconfiguration degree. According to the catalyst prepared by the invention, high overpotential and polarization intensity in oxygen evolution reaction can be effectively reduced through high self-reconfiguration, and the catalyst has low Tafel slope and high catalytic activity.

According to the method for preparing the molybdenum disulfide-based piezoelectric catalytic material in the second-level ultra-fast mode, the problems of complexity and high cost existing in a traditional method are solved through combination of ultrasonic treatment, rotary evaporation and magnetic induction heating. The method is simple to operate and short in preparation time, and the efficient molybdenum disulfide-based piezoelectric catalytic material can be prepared in a short time. Meanwhile, the material has excellent catalytic performance and stability and can be widely applied to the fields of electro-catalysis hydrogen evolution reaction, water treatment and the like.

The invention discloses a method for preparing a high-entropy spinel type oxide material through microwave hydrothermal treatment and a product and application of the high-entropy spinel type oxide material, and belongs to the technical field of material science and chemical engineering.The method comprises the following steps that six metal sources of iron, cobalt, nickel, chromium, zinc and copper are dissolved in water according to the metal ion equimolar ratio and stirred to be uniform, and a mixed solution is obtained; adding a precipitator into the mixed solution, and then sequentially carrying out microwave hydrothermal treatment, cooling, washing, centrifuging, drying and calcining treatment to obtain the high-entropy spinel type oxide material (FeCoNiCrZnCu) 3O4. According to the invention, the spinel type oxide is subjected to high-entropy design, and the high-entropy spinel material with excellent water electrolysis catalytic performance is synthesized. On one hand, the raw material for synthesizing the material is relatively cheap transition metal nitrate, the source is wide, and the cost is low; and on the other hand, the microwave hydrothermal method can efficiently synthesize the high-entropy spinel material under mild reaction conditions, and has the characteristics of greenness and environmental protection.

The invention provides a bimetallic-catalyzed magnesium-based hydrogen storage material and a preparation method thereof, and relates to the technical field of hydrogen energy. The magnesium-based hydrogen storage material is a compound mainly formed by magnesium hydride and a catalyst, and the catalyst is a bimetallic catalyst TiO2 / C / Ni formed by loading nickel and titanium dioxide on a carbon substrate; according to the magnesium-based hydrogen storage material MgH2-TiO2 / C / Ni, a bimetallic catalyst TiO2 / C / Ni is introduced into MgH2, trace efficient catalysis of MgH2 is achieved, the hydrogen storage capacity of MgH2 is not excessively lost, meanwhile, the excellent catalytic effect can be achieved, and therefore the prepared magnesium-based hydrogen storage material MgH2-TiO2 / C / Ni shows excellent hydrogen storage performance and hydrogen absorption and desorption cycle stability. The invention also provides a preparation method of the bimetal catalyzed magnesium-based hydrogen storage material, and the preparation method introduces a catalyst into an MgH2 system through a ball milling method to realize stable preparation of the magnesium-based hydrogen storage material.

The invention discloses an ammonia decomposition hydrogen production catalyst and a preparation method and application thereof, and relates to the field of catalysis, the catalyst comprises a carrier and an active component, and the carrier is doped porous nanorod-like cerium dioxide; the active component is alloy nanoparticles formed by ruthenium and other metals, and the ruthenium loading amount accounts for 0.8-2% of the total mass of the catalyst. The preparation process of the catalyst comprises the following steps: respectively preparing the carrier and the active component, anchoring the active component on the carrier in a highly dispersed manner in an in-situ loading manner, and enabling the active component of the catalyst and the carrier to form a strong synergistic catalysis effect by using a segmented heating gradient reduction process so as to show the characteristics of low-temperature high activity and high stability. Under the reaction conditions that the normal pressure is 0.1 MPa, the temperature is 450 DEG C and the air speed is 24000mL. G <-1 >. H <-1 >, the ammonia decomposition conversion rate reaches 99.5%, and the catalyst can stably run for 1000h without obvious inactivation.

The invention discloses preparation and application of an imido covalent organic framework material containing imidazolyl ionic liquid. The imido covalent organic framework material (ILs-TPN-COFs) containing the imidazolyl ionic liquid is obtained by connecting the imidazolyl ionic liquid [CnCmILs (at) Br] to an imido covalent organic framework TPN-COFs through a covalent bond. The material has an ionic liquid tertiary amine N active site and a halogen anion active site, and can promote CO2 activation and ring opening of epoxide. The ILs-TPN-COFs catalytic material has the advantages of uniform distribution of active sites, better stability, easiness in separation of the catalyst from a reaction system, better repeatability and the like. According to the invention, the prepared novel ILs-TPN-COFs material is applied to catalysis of synthesis of propylene carbonate from carbon dioxide and epoxypropane, and shows excellent catalytic performance under mild reaction conditions.

The invention discloses a recycling method of polyethylene glycol terephthalate (PET). According to the method, organic acid is used as a catalyst for hydrolysis of PET, the organic acid is selected from one or more of adipic acid, lactic acid and glycollic acid, and then hydrolysis products are directly polymerized with additional monomers and polymerization catalysts to prepare the biodegradable copolyester without any separation treatment step. The prepared copolyester has biodegradability, so that the non-degradable PET is converted into the biodegradable copolyester by the recycling method, and the recycling method has important significance for relieving the problem of environmental pollution.

The invention discloses a method for preparing tert-butyl ethylbenzene through alkylation of ethylbenzene and isobutene. In a reactor, a raw material containing ethylbenzene and isobutene is in contact with a catalyst for an alkylation reaction to obtain a product containing tert-butyl ethylbenzene, by changing the proportion of the shell ZSM-12 molecular sieve in the hydrogen-type Beta-coated ZSM-12 core-shell molecular sieve and combining high-temperature water vapor treatment, the obtained catalyst shows excellent catalytic performance in liquid-phase alkylation reaction of ethylbenzene and isobutene. The catalyst preparation process is simple to operate and easy for industrial production. The development of a p-tert-butyl ethylbenzene production technology is favorably promoted.

The invention provides a preparation method of an MXene-based alkaline electrolytic water hydrogen production electrode. The preparation method comprises the following steps: 1, pretreatment of a base material: cleaning impurities on the base material, drying, and carrying out sand blasting roughening treatment; secondly, first metal powder and second metal powder are weighed and mixed according to a certain proportion to be guided into a powder mixing machine, vacuum drying is conducted after mixing treatment, third metal powder is prepared, the first metal powder is MAX phase powder, and the second metal powder is one or more of metal simple substances or alloys used for water electrolysis hydrogen production; thirdly, third metal powder is deposited on the surface of the pretreated base material through the plasma spraying technology, and a composite coating is obtained; 4, immersing the base material treated in the step 3 into an activation solution for activation; 5, after activation is finished, the base material is taken out and dried, and then the electrode is obtained.The method optimizes the conductivity and hydrophilicity of the electrode, and the diversity of the morphology of a plasma spraying electrode coating is improved.

The invention provides a flow-state solidified soil modifier and a preparation method thereof, and belongs to the technical field of modifiers. The adhesive is prepared from the following raw materials in parts by weight: 20-40 parts of a modified glue solution, 4-7 parts of an active material, 15-25 parts of a micro-expansion material, 1-2 parts of an exciting agent and 2-4 parts of an auxiliary agent. Soil solidified by the fluid solidified soil modifier has good mechanical strength, small mixing amount, low cost, convenience in construction, high early strength and later stable strength of the soil, good water retention and water resistance, small strength change after the soil encounters water, and the active material has good stability, low cost and high enzyme loading capacity, so that the fluid solidified soil modifier has good application prospects. The method improves the catalytic ability of the enzyme, is safe and non-toxic, is low in later maintenance cost, can be repeatedly used, has heavy metal pollution repair ability, can degrade heavy metals and reduce the use amount of chemical degradation elements, and has wide application prospects.

The invention discloses a nano-carbon supported ruthenium cluster nano-catalyst as well as a preparation method and application thereof. According to the present invention, the synthesis process of the catalyst is simple and easy to perform, the reaction process is controllable, the nanocarbon with characteristics of rich defects and large specific surface area is adopted as the carrier, the ruthenium cluster is loaded on the surface of the nanocarbon, and the nanometer catalyst with characteristics of high specific surface area and high atom utilization rate is synthesized. The catalyst can catalyze persulfate (PDS) to generate products with strong oxidation activity, namely sulfate free radicals (SO4.-), hydroxyl free radicals (. OH) and singlet oxygen (1O2), so that effective inactivation of bacteria is realized. In the invention, the reaction of activating the persulfate to disinfect by the catalyst is carried out at room temperature under neutral conditions, and in a mild reaction environment, the nanocarbon-loaded ruthenium cluster nanocatalyst shows good capability of catalyzing the persulfate to inactivate bacteria, and has huge potential in practical application of water disinfection.

The invention relates to a spherical chiral covalent organic framework and a preparation method and application thereof.The spherical chiral covalent organic framework is a spherical chiral L-DTP-TAPB COF material containing a proline fragment, and the L-DTP-TAPB COF material has high crystallinity and spherical morphology, contains rich tetrahydropyrrole chiral catalytic sites, and has the advantages of being high in catalytic activity and high in catalytic activity. The catalyst can be applied to asymmetric aldol reaction and shows excellent catalytic activity. In catalysis of a reaction of p-nitrobenzaldehyde and cyclohexanone, the reaction yield is up to 96%, the ee value can reach 87%, and the catalytic performance of the chiral COFs and chiral metal organic framework catalysts is higher than that of most reported chiral COFs and chiral metal organic framework catalysts. And meanwhile, excellent recycling performance is also shown.

The invention provides a biochar loaded sulfur modified zero-valent iron material and application thereof in groundwater remediation, and particularly relates to the technical field of inorganic materials. According to the biochar-loaded sulfur-modified zero-valent iron material, sulfur-modified zero-valent iron is loaded in a porous structure of biochar; the sulfur modified zero-valent iron has a core-shell structure; wherein the inner core of the core-shell structure is zero-valent iron, and the outer shell of the core-shell structure is iron sulfide. According to the biochar-loaded sulfur-modified zero-valent iron material provided by the invention, a sulfide layer is formed on the surface of zero-valent iron, so that a zero-valent iron core is prevented from being in direct contact with water or dissolved oxygen, and the durability of the zero-valent iron core is improved. Delocalized electrons in the sulfide layer promote the electron transfer process, and the catalytic performance of the material is enhanced. The biochar loaded sulfur modified zero-valent iron material provided by the invention is high in stability and wide in application range. Due to the multifunctionality of the material, the material has potential application value in a plurality of fields such as environmental restoration and pollutant degradation.