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38results about How to "High catalytic degradation activity" patented technology
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Method for removing organic pollutant in water
InactiveCN107857352AHigh catalytic degradation activityFast degradationWater contaminantsWater/sewage treatment by oxidationIonDegradation reaction
The invention discloses a method for removing an organic pollutant in water. The method comprises the following steps: 1) regulating the pH (potential of Hydrogen) of a to-be-treated water body to 3 to 9 by using a pH regulator; 2) adding hydroxylamine, peroxymonosulfate (PMS), percarbonate and a bivalent copper ion into the treated water body in the step 1), and carrying out an agitation reactionat a set temperature, so that the treatment of the organic pollutant in the water is completed after the reaction is completed. According to the method, Cu<2+> is reduced to be Cu<+> by using the hydroxylamine; next, the Cu<+> is oxidized to be Cu<3+> by utilizing the PMS and the percarbonate; the generated Cu<3+>, compared with a sulfate-radical free group and a hydroxyl-group free group which are generated by the activation of the PMS, is higher in catalytic degradation activity and therefore, is quicker in the degradation speed of the organic pollutant; secondly, the Cu<2+>, the Cu<+> andthe Cu<3+> are in a cyclic process in a sewage treatment process; therefore, a small amount of the Cu<2+> only needs to be added, so that the degradation reaction of the organic pollutant can be guaranteed to be carried out and the secondary pollution is difficultly caused.
Owner:汤镕嘉
Nano cellulose-reinforced composite photocatalyst as well as preparation method and application thereof
ActiveCN108714431AIncrease the active siteHigh catalytic degradation activityWater/sewage treatment by irradiationWater treatment compoundsAir atmosphereChemisorption
The invention discloses a preparation method of a nano cellulose-reinforced composite photocatalyst. The preparation method comprises the following steps: (1) dissolving silver nitrate and urea in a suspension liquid of nano cellulose, and then drying to obtain a precursor substance; (2) calcining the precursor substance at 450 to 600 DEG C under an oxygen or air atmosphere to obtain a nano cellulose-reinforced composite photocatalytic material. The invention further discloses the nano cellulose-reinforced composite photocatalyst prepared with the method and application thereof. According to the invention, the strong chemisorption and physical entanglement effect of abundant carboxyl groups, hydroxyl groups and network structures intertwined with the carboxyl groups and hydroxyl groups onnano cellulose chains on Ag+ are innovatively utilized, and the Ag+ is fixed on the surface of carbonized nitrogen, so that the loss of the Ag+ is reduced; at the same time, carbon doping is achieved;and C and Ag synergistically promote the catalytic degradation efficiency of the carbonized nitrogen significantly.
Owner:CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
Anodization two-step preparation method of cuprous oxide nanosheet powder material
InactiveCN102965711ASimple manufacturing processReduce energy consumptionAnodisationCopper foilPollution
The invention discloses an anodization two-step preparation method of a cuprous oxide nanosheet powder material. The method comprises the following steps: anodization: using an ammonium chloride buffer solution as an electrolyte, regulating the pH value of the electrolyte to 4-10, and carrying out anodization reaction by using a copper foil as the anode and a graphite electrode or platinum electrode as the cathode; and foaming treatment: after the reaction finishes, cleaning the copper foil, drying, immersing the copper foil in a low-concentration oxydol solution, carrying out foaming reaction for 10-60 minutes, taking out, flushing, and drying to obtain the cuprous oxide nanosheet powder material which is attached to the copper foil substrate. The preparation technique disclosed by the invention is simple and easy to implement, has the advantages of low energy consumption, low cost and no pollution, is suitable for mass production, and has very important meanings for saving the energy sources and resources and improving the environment; and the prepared powder material has the advantages of large specific area and high catalytic activity, can be well attached to the substrate, and is convenient for recovery and reutilization.
Owner:SHANGHAI JIAO TONG UNIV
Low-energy consumption chemical field-driven organic pollutant degradation catalyst and application thereof
ActiveCN109248680AGood degradation treatment effectReduce energy consumptionWater/sewage treatment by irradiationWater treatment compoundsIonAmount of substance
The invention relates to the field of environmental protection, and discloses a low-energy chemical field-driven organic pollutant degradation catalyst and an application thereof. The catalyst can efficiently degrade azo dyes, nitro compounds and various other organic pollutants without providing additional energy. The catalysis system uses formate as an assistant, metallic palladium, silver, gold, platinum and iridium are used as catalytic active main bodies and are supported on the surface of a carrier oxide, C-H bonds in formate radicals are broken when the formate ions in a mixed solutionof the formate and organic pollutants are in contact with a transitional noble metal interface in order to form reactive oxygen species, the reactive oxygen species include hydroxyl radicals, hydrogenperoxide radicals, carbonate radicals and the like, and the generated free radicals rapidly oxidize adsorbed organic matters into small-molecular substances which can be naturally degraded, or even nontoxic water, CO2 or carbonates. The catalyst has the advantages of extremely high efficiency in organic pollutant degradation treatment, low cost, stable catalysis system and high recycling rate.
Owner:安吉国千环境科技有限公司
Ionic liquid regulation-control bio-enzyme, method for degrading environmental hormone carbaryl by same, and method for determining degradation rate
InactiveCN104726441AImprove stabilityImprove effective utilizationComponent separationWater contaminantsSolubilityPeroxidase
The invention relates to an ionic liquid regulation-control bio-enzyme, a method for degrading environmental hormone carbaryl by the same, and a method for determining the degradation rate. The ionic liquid regulation-control bio-enzyme comprises the mixed solution formed by adding chloroperoxidase, quaternary ammonium salt ionic liquids and H2O2 in a phosphate buffer solution with a pH value of 2-5, wherein in the mixed solution, the concentration of chloroperoxidase is 0.005-0.05mu mol.L<-1>, the concentration of ammonium salt ionic liquids is 0.06-0.20mol.L<-1>, and the concentration of H2O2 is 0.05-0.5mmol.L<-1>. According to the ionic liquid regulation-control bio-enzyme, the method for degrading environmental hormone carbaryl by the same, and the method for determining the degradation rate disclosed by the invention, the chloroperoxidase is used as a biocatalyst, the ammonium salt ionic liquids are used as regulation-control factors, the ammonium salt ionic liquids have a cosolvent effect on the chloroperoxidase, and can be used for improving the stability of the chloroperoxidase, increasing the enzyme catalysis speed and increasing the effective utilization rate of the chloroperoxidase; the ionic liquid regulation-control bio-enzyme is capable of effectively improving the solubility of carbaryl and increasing the degradation rate in case of being applied to degradation for carbaryl.
Owner:SHAANXI NORMAL UNIV
Indium zinc sulfide/zinc ferrite composite photocatalyst as well as preparation method and application thereof
PendingCN114100635AEasy to handleHigh catalytic degradation activityPhysical/chemical process catalystsDispersed particle separationPyrrolidinonesPhotocatalytic degradation
The invention provides an indium zinc sulfide / zinc ferrite composite photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: a) mixing an iron source, a zinc source and polyvinylpyrrolidone in the presence of a first solvent, performing electrostatic spinning, and calcining to obtain ZnFe2O4 nanofibers; and b) mixing a zinc source, an indium source and a sulfur source in the presence of a second solvent, adding the ZnFe2O4 nanofiber obtained in the step a), and carrying out solvothermal reaction, so that the obtained ZnIn2S4 nanosheet is loaded on the ZnFe2O4 nanofiber to obtain the indium zinc sulfide / zinc ferrite composite photocatalyst. Compared with the prior art, the preparation method provided by the invention has the advantages that a two-dimensional ZnIn2S4 nanosheet photocatalyst is loaded on one-dimensional zinc ferrite (ZnFe2O4) nanofibers through a low-temperature solvothermal method, so that the ZnIn2S4 / ZnFe2O4 nano composite material is obtained, and the composite material can be used for carrying out photocatalytic degradation on waste gas so as to effectively treat the waste gas.
Owner:苏州一泓环保科技有限公司
Universal preparation method and application of hierarchical-pore nitrogen-doped carbon catalyst synthesized on basis of double pore-foaming agents
PendingCN110773222AIncrease the areaHigh pore volumeWater treatment compoundsWater contaminantsMolecular sievePtru catalyst
The invention discloses a universal preparation method and application of a hierarchical-pore nitrogen-doped carbon catalyst synthesized on the basis of double pore-foaming agents. The preparation method comprises the following steps: mixing biomass chitosan, ethylenediamine tetraacetic acid cobalt disodium salt and a molecular sieve SBA-15 with water, and carrying out drying to obtain a materialA; heating the material A from room temperature to 300 DEG C for 60 min under the protection of inert gas, keeping the material A at 300 DEG C for 60 min, heating the material A to 800 DEG C at a heating rate of 10 DEG C / min, keeping the material A at 800 DEG C r 120 min, and carrying out natural cooling to room temperature to obtain a material B; and adding the material B into an acidic solution,soaking the material B for 12 h, washing the material B with high-purity water until a filtrate is neutral, and carrying out drying at 40-60 DEG C for 12 h to obtain the target product, i.e., hierarchical-pore nitrogen-doped carbon catalyst. The hierarchical-pore nitrogen-doped carbon catalyst has a specific surface area of 661-925 m<2> / g, contains a large number of micropores and mesopores, canefficiently degrade organic pollutants when applied as a positive electrode material to an electro-Fenton system, and is free of secondary pollution and friendly to environment in use.
Owner:HENAN NORMAL UNIV
Method for preparing bowknot-shaped fluorine-oxygen-bismuth photocatalyst and application of catalyst
ActiveCN104998666ASimple methodHigh catalytic degradation activityPhysical/chemical process catalystsWater/sewage treatment by irradiationCentrifugationOxygen
The invention discloses a method for preparing bowknot-shaped fluorine-oxygen-bismuth photocatalyst and an application of the catalyst. The method comprises the following steps that bismuth nitrate pentahydrate is added in water, the adding amount is 0.4g / 15mL to 0.5g / 15mL according to the volume of the water, stirring is conducted for 15 to 20 min, and stirring is conducted continuously for 5 to 15 min to form mixing solution; then the mixing solution is added into a linear made of teflon to conduct hydrothermal reaction; cooling is conducted after the reaction is finished, centrifugation is conducted, sediment is obtained, and the bowknot-shaped fluorine-oxygen-bismuth photocatalyst BI7F1105 is obtained by drying and washing. The method for preparing the bowknot-shaped fluorine-oxygen-bismuth photocatalyst has the advantages that the prepared bowknot-shaped fluorine-oxygen-bismuth photocatalyst can be existed stably, the form is good, the bowknot-like shape is not reported ever, and the ability of catalytic degradation on organic matters is higher than that of the normal TiO2 catalyst.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Preparation and application of g-C3N4 and polymer PDPB compounded photocatalyst
InactiveCN106179499AReduce pollutionEasy to synthesizeWater/sewage treatment by irradiationWater treatment compoundsDiacetyleneCarbon nitride
The invention relates to a g-C3N4 and polymer 1,4-diphenyl diacetylene (PDPB) compounded photocatalyst and application of the photocatalyst in degradation of dyestuff Rhodamine B. Preparation is mainly characterized in that g-C3N4 and PDPB are mixed and stirred in solvent, and g-C3N4 and PDPB are compounded together by evaporating the solvent. The preparing method is simple, easy to operate, low in cost, high in yield and small in environment pollution, prepared catalyst photoinduced electrons and holes can be effectively separated, and the photocatalytic activity is remarkably improved. Rhodamine B is degraded under visible light, and it is proved that the CN-PDPB compounded material has higher visible-light catalytic activity than pure carbon nitride and pure PDPB.
Owner:EAST CHINA UNIV OF SCI & TECH
Method for preparing compound metallic oxide catalyst for catalyzing the degradation of dioxin
InactiveCN101733107ALow costEasy to prepareMetal/metal-oxides/metal-hydroxide catalystsWater bathsFiltration
The invention provides a method for preparing a compound metallic oxide catalyst for catalyzing the degradation of dioxin. The method comprises the following steps of: using NaOH or KOH as precipitant, under the condition of stirring sharply and water bath, dripping a solution containing Ca<2+>, Fe<3+> and TiO2, carrying out titration, performing pumping filtration, washing, drying and baking to obtain the compound metallic oxide catalyst. Through controlling the composition of the Ca<2+> and the Fe<3+> and the titration speed, the compound metallic oxide catalyst with an active component of Ca2Fe2O5 is obtained. The catalyst has advantages of low cost, easy preparation method and high catalytic degradation activity to dioxin pollutants.
Owner:NANKAI UNIV
Universal method for preparing hierarchical pore coexisting heteroatom doped carbon catalyst by using soft template agent, and applications of hierarchical pore coexisting heteroatom doped carbon catalyst
ActiveCN110694606ARich hierarchical pore structureIncrease the areaWater treatment compoundsWater contaminantsPtru catalystPorous carbon
The invention discloses a universal method for preparing a hierarchical pore coexisting heteroatom doped carbon catalyst by using a soft template agent, and applications of the hierarchical pore coexisting heteroatom doped carbon catalyst, and belongs to the technical field of synthesis of porous carbon materials. The technical scheme comprises: uniformly mixing biomass, a soft template agent anda doping agent to obtain a material A; heating the material A for 60 min to achieve 300 DEG C from a room temperature under the protection of inert gas, keeping the temperature for 120 min, heating to800 DEG C at a heating rate of 3 DEG C / min, keeping the temperature for 120 min, and naturally cooling to a room temperature to obtain a material B; and washing the material B with a hydrochloric acid solution, and drying at 105 DEG C for 12 h to obtain the hierarchical pore coexisting heteroatom doped carbon catalyst. According to the invention, the electrochemical performance of the synthesizedheteroatom-doped carbon catalyst is tested by using a rotating disc to screen the electrode material subjected to a two-electron reaction, and the screened material as a cathode material is used in an electro-Fenton degradation system to efficiently degrade organic pollutants, so that the work of the screening of the electrode material is reduced, and secondary pollution cannot be caused in the using process.
Owner:HENAN NORMAL UNIV
Preparation of SnS2 nanosheet with S vacancy and application of SnS2 nanosheet in photodegradation of Cr (VI)
ActiveCN112495400AHigh catalytic activityImprove performanceMaterial nanotechnologyWater/sewage treatment by irradiationPhotodegradationMixed gas
The invention discloses preparation of a SnS2 nanosheet with S vacancy and application of the SnS2 nanosheet in photodegradation of Cr (VI), and belongs to the technical field of environmental protection and pollutant degradation. The preparation comprises the steps: calcining the SnS2 nanosheet obtained in the step 1 in a hydrogen / argon mixed gas at high temperature, cooling to room temperature,and collecting the obtained powder which is the SnS2 nanosheet with the S vacancy. Photodegradation results show that the removal rate of the ultrathin SnS2 nanosheet with rich S vacancies within 1 hon hexavalent chromium Cr (VI) reaches 98% and is far higher than that of SnS2 nanosheets without S vacancies, and the degradation rate of the ultrathin SnS2 nanosheet with rich S vacancies within 1 his only 31%.
Owner:江苏悟晴电子新材料有限公司
Preparation method and application of visible light response magnetic metal organic framework material
ActiveCN109225341AUniform particle size distributionStable particle size distributionWater/sewage treatment by irradiationOrganic-compounds/hydrides/coordination-complexes catalystsMetal-organic frameworkCarboxylic acid
The invention relates to a preparation method and application of a visible light response magnetic metal organic framework material; and the preparation method comprises the preparation steps of: firstly, preparing by adopting a solvothermal method to respectively obtain a polyamine metal organic framework material and nano Fe3O4; then introducing an epoxy group on the surface of the nano Fe3O4 byan ultrasonic assisted polymerization method to prepare epoxy functional nano Fe3O4; and then carrying out induction open-loop self-assembling on the epoxy functional nano Fe3O4 and the polyamine metal organic framework material by carboxylic acid to obtain the amino / carboxyl modified magnetic metal organic framework material. The product obtained by the method disclosed by the invention is in apowder form, is medium brown, and is uniform in particle size distribution and stable in property. The defect of solution agglomeration of a material material is overcome, and the prepared material isgood in dispersibility, high in magnetic performance, rapid in response, easy in obtaining of the raw materials and high in yield; and the visible light response magnetic metal organic framework material has visible light response, magnetic and accurate controllable topological structures, has a wide pH application range, achieves visible light catalysis and magnetism dual functions of the material and is beneficial to separation and recovery of a catalyst.
Owner:NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
Two-step preparation method of anodic oxidation of cuprous oxide nanosheet powder material
InactiveCN102965711BSimple manufacturing processReduce energy consumptionAnodisationCopper foilTwo step
The invention discloses an anodization two-step preparation method of a cuprous oxide nanosheet powder material. The method comprises the following steps: anodization: using an ammonium chloride buffer solution as an electrolyte, regulating the pH value of the electrolyte to 4-10, and carrying out anodization reaction by using a copper foil as the anode and a graphite electrode or platinum electrode as the cathode; and foaming treatment: after the reaction finishes, cleaning the copper foil, drying, immersing the copper foil in a low-concentration oxydol solution, carrying out foaming reaction for 10-60 minutes, taking out, flushing, and drying to obtain the cuprous oxide nanosheet powder material which is attached to the copper foil substrate. The preparation technique disclosed by the invention is simple and easy to implement, has the advantages of low energy consumption, low cost and no pollution, is suitable for mass production, and has very important meanings for saving the energy sources and resources and improving the environment; and the prepared powder material has the advantages of large specific area and high catalytic activity, can be well attached to the substrate, and is convenient for recovery and reutilization.
Owner:SHANGHAI JIAOTONG UNIV
Application of ce(io3)4
InactiveCN106807408BResolve low activitySolve the problem that activity is heavily dependent on light conditionsPhysical/chemical process catalystsWater/sewage treatment by irradiationRoom temperatureMethyl orange
The invention discloses an application of Ce(IO3)4, and provides an application example of the compound for the first time. As a catalyst, the Ce(IO3)4 can degrade organic dyestuff pollutants under a condition of completely lucifugal room temperature. The Ce(IO3)4 catalyzes and degrades the activity of Rhodamine B (RhB) and methyl orange (MO) dyestuff under a completely lucifugal condition, and is apparently superior to a commercial titanium dioxide (P25) photocatalyst under visible light irradiation. When the Ce(IO3)4 disclosed by the invention catalyzes and degrades dyestuff, illumination is not required; the activity is relatively high; the preparation method for the Ce(IO3)4 is simple; the preparation condition is mild; therefore, the Ce(IO3)4 is favorably popularized and applied.
Owner:CHONGQING THREE GORGES UNIV
Fe(III)-Salen functionalized nano Fe3O4 composite material as well as preparation method and application thereof
InactiveCN107008506AUniform particle size distributionStable in natureOrganic-compounds/hydrides/coordination-complexes catalystsWater contaminantsDispersityBenzaldehyde
The invention discloses a Fe(III)-Salen functionalized nano Fe3O4 composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing an amino-functionalized nano Fe3O4 magnetic composite material (NH2-nFe3O4) by adopting a solvothermal method, condensing with o-hydroxy-containing substituted benzaldehyde so as to obtain Salen functionalized nano Fe3O4 (nFe3O4@Salen), and further complexing with Fe(III), thereby obtaining the nFe3O4@Fe(III)Salen composite material. The product obtained by the method disclosed by the invention is powdered and brown, and is uniform in particle size distribution and stable in property. NH2-nFe3O4 prepared by the solvothermal method overcomes the defect of agglomeration of a magnetic material solution, and the obtained material is high in dispersity and excellent in magnetic property; Salen obtained by condensing amino and o-hydroxy-containing substituted benzaldehyde is fast in reaction, readily available in raw materials and high in yield; the material is enriched in amino, hydroxyl and other functional groups; and due to the Fe(III) active center, a Fenton-like system is immobilized onto the magnetic Fe3O4 material, the composite material has a wide pH application range, dual functions of catalysis and magnetism of the material are realized, and separation and recovery of catalysts are promoted.
Owner:NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
Application of CeGeO4
InactiveCN106745348AExpand the scope of applicationResolve low activityWater contaminantsWater/sewage treatmentPollutantOrganic dye
The invention discloses an application of CeGeO4. CeGeO4 as a catalyst has catalytic activity under an illumination condition and also can degrade organic dye pollutants under a completely lucifugal room temperature condition, and an application scope of CeGeO4 is enlarged. CeGeO4 ha apparently higher activity of catalytic degradation of rhodamine B (RhB) and methylene blue (MB) dyes under the completely lucifugal condition as compared with a CeO2 catalyst. CeGeO4 does not require illumination and has higher activity during catalytic degradation of the dyes; a preparation method of CeGeO4 is simple; a preparation condition is mild; and the popularization and application of CeGeO4 is facilitated.
Owner:HUNAN UNIV OF SCI & TECH
Lighting lamp with air purification function
InactiveCN111530484AAchieve multi-functionalityImprove purification effectGas treatmentOrganic-compounds/hydrides/coordination-complexes catalystsNano al2o3Engineering
The invention relates to a lighting lamp with an air purification function. The lamp comprises an electric light source, a lamp holder and a lampshade. The outer surface of the lampshade is evenly sprayed with a photocatalyst film, the photocatalyst film is prepared from a photocatalyst and a film forming agent, and the photocatalyst is formed by gathering bismuth titanate nanosheets and titaniumcarbide nanosheets on nanometer aluminum oxide particles and is provided with a porous surface; air purification is combined with a daily lighting lamp, indoor air is purified while lighting is conducted, multi-functionalization of the lighting lamp is achieved. The lighting lamp has the advantages of being good in purification effect and long in service life.
Owner:泉州市鑫创园智能科技有限公司
Application of Ce(IO3)4
InactiveCN106807408AEasy to prepareMild preparation conditionsPhysical/chemical process catalystsWater/sewage treatment by irradiationRoom temperatureMethyl orange
The invention discloses an application of Ce(IO3)4, and provides an application example of the compound for the first time. As a catalyst, the Ce(IO3)4 can degrade organic dyestuff pollutants under a condition of completely lucifugal room temperature. The Ce(IO3)4 catalyzes and degrades the activity of Rhodamine B (RhB) and methyl orange (MO) dyestuff under a completely lucifugal condition, and is apparently superior to a commercial titanium dioxide (P25) photocatalyst under visible light irradiation. When the Ce(IO3)4 disclosed by the invention catalyzes and degrades dyestuff, illumination is not required; the activity is relatively high; the preparation method for the Ce(IO3)4 is simple; the preparation condition is mild; therefore, the Ce(IO3)4 is favorably popularized and applied.
Owner:CHONGQING THREE GORGES UNIV
BiOCl/expanded perlite floating photocatalyst and application thereof
InactiveCN112246257AHigh catalytic activityEvenly distributedWater/sewage treatment by irradiationWater treatment compoundsOrganic dyeOrganic chemistry
The invention discloses a BiOCl / expanded perlite floating type photocatalyst, the BiOCl / expanded perlite floating type photocatalyst is obtained by calcining a BiOCl / EP composite material at a high temperature, and the BiOCl / EP composite material is composed of expanded perlite and BiOCl powder loaded in pores on the surface of the expanded perlite. The invention also discloses an application of the BiOCl / expanded perlite floating photocatalyst in degradation of organic dyes, hydrocarbons and esters. The BiOCl / expanded perlite floating photocatalyst disclosed by the invention has high catalytic degradation activity under simulated sunlight.
Owner:JIANGNAN UNIV
A kind of preparation method and application of titanium-based nanosheet composite catalyst
ActiveCN108355648BEfficient catalytic oxidationLow costDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsCatalytic oxidationCerium
The invention relates to a preparation method and application of a titanium-based nano-sheet composite catalyst. The preparation method comprises the following steps: taking tetrabutyl titanate as a titanium source and regulating and controlling hydrothermal synthesis conditions to prepare a TiO2 nano-sheet carrier capable of preferentially exposing a (001) crystal surface; loading manganese and cerium metal oxide active components to prepare the titanium-based nano-sheet composite catalyst. According to the catalyst prepared by the invention, the (001) crystal surface, which is preferentiallyexposed, of a TiO2 nano-sheet, and the manganese and cerium metal oxide active components have a strong mutual effect, and efficient catalytic oxidation on chlorinated aromatic hydrocarbon can be realized.
Owner:HEBEI UNIV OF TECH
A kind of nano-cellulose reinforced composite photocatalyst and its preparation method and application
ActiveCN108714431BIncrease the active siteHigh catalytic degradation activityWater/sewage treatment by irradiationWater treatment compoundsAir atmosphereChemisorption
The invention discloses a method for preparing a nanocellulose-enhanced composite photocatalyst, which includes the following steps: (1) Dissolve silver nitrate and urea in a suspension of nanocellulose, and then dry to obtain a precursor substance; (2) Nanocellulose-reinforced composite photocatalytic materials can be obtained by calcining the precursor material at 450-600°C in an oxygen or air atmosphere. The invention also discloses the nanocellulose reinforced composite photocatalyst prepared by the method and its application. The present invention innovatively utilizes the abundant carboxyl and hydroxyl groups on the nanocellulose chains and their intertwined network structure to react with Ag. + With strong chemical adsorption and physical entanglement, Ag + Fixed on the surface of carbonized nitrogen to reduce Ag + At the same time, carbon doping is achieved, and C and Ag synergistically significantly promote the catalytic degradation efficiency of carbonized nitrogen.
Owner:CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
A sns with s vacancy 2 Preparation of Nanosheets and Its Application in Photodegradation of cr(ⅵ)
ActiveCN112495400BHigh catalytic activityImprove performanceMaterial nanotechnologyWater/sewage treatment by irradiationEnvironmental engineeringPhotodegradation
A SnS with S vacancies 2 The preparation of nanosheets and their application in photodegradation of Cr(VI) belong to the technical field of environmental protection and pollutant degradation. SnS obtained in step 1 2 The nanosheets were calcined at high temperature in a hydrogen / argon mixed gas, then cooled to room temperature, and the collected powder was SnS with S vacancies 2 Nanosheets. Photodegradation results reveal ultrathin SnS with abundant S vacancies within 1 h 2 The removal rate of the nanosheets for hexavalent chromium Cr(Ⅵ) reached 98%, which is much higher than that of SnS without S vacancies. 2 Nanosheets, the degradation rate is only 31%.
Owner:江苏悟晴电子新材料有限公司
Preparation method and application of visible light-responsive magnetic metal-organic framework materials
ActiveCN109225341BUniform particle size distributionStable particle size distributionWater/sewage treatment by irradiationOrganic-compounds/hydrides/coordination-complexes catalystsEpoxyPtru catalyst
A preparation method and application of a visible light responsive magnetic metal organic framework material, the preparation steps are: firstly prepare the polyamine metal organic framework material and nano-Fe by solvothermal method 3 o 4 , and then through the ultrasonic assisted polymerization method in the nano-Fe 3 o 4 Preparation of Epoxy-functionalized Nano-Fe by Introducing Epoxy Groups on the Surface 3 o 4 , and then self-assembled with carboxylic acid-induced ring-opening to obtain amino / carboxyl-modified magnetic metal-organic frameworks. The product obtained by the method of the invention is powdery, brown in color, uniform in particle size distribution and stable in property. Overcoming the shortcomings of magnetic material solution agglomeration, the resulting material has good dispersibility, high magnetic properties, fast response, easy access to raw materials, and high yield; it has both visible light response, magnetism, and precise controllable topological structure, and has a wide range of pH applications. The dual functions of visible light catalysis and magnetism of the material are realized, which is beneficial to the separation and recovery of the catalyst.
Owner:NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
A method for regulating biological enzymes and its degradation of environmental hormone carbaryl by ionic liquid, and a method for determining the degradation rate
InactiveCN104726441BImprove stabilityImprove effective utilizationComponent separationWater contaminantsSolubilityPeroxidase
Owner:SHAANXI NORMAL UNIV
Applications of cerium hydrogen iodate tetrahydrate
InactiveCN106745647AIncreased durabilityFix low durabilityPhysical/chemical process catalystsWater/sewage treatment by oxidationMo degradationOrganic dye
The present invention discloses applications of cerium hydrogen iodate tetrahydrate (CeHIO6.4H2O), and firstly provides the application example of the compound. According to the present invention, the cerium hydrogen iodate tetrahydrate adopted as a catalyst can degrade organic dye contaminants at a room temperature under a completely dark condition; the methyl orange (MO) dye catalytic degradation activity of CeOIO6.4H2O under a completely dark condition is significantly higher than the methyl orange (MO) dye catalytic degradation activity of commercial titanium dioxide (P25) photocatalysts under visible light irradiation; CeHIO6.4H2O is highly durable, wherein the activity is not significantly reduced after CeHIO6.4H2O is recycled 3 times in the MO degradation experiment; when the CeHIO6.4H2O performs the catalytic degradation of dyes, the characteristics of no requirement of illumination, high activity and high durability are provided; and the preparation method is simple, the preparation condition is mild, and the method is suitable for popularization and application.
Owner:CHONGQING THREE GORGES UNIV
A kind of method for preparing bowtie-shaped bismuth oxyfluoride photocatalyst and catalyst application
ActiveCN104998666BSimple methodHigh catalytic degradation activityPhysical/chemical process catalystsWater/sewage treatment by irradiationCentrifugationOxygen
The invention discloses a method for preparing bowknot-shaped fluorine-oxygen-bismuth photocatalyst and an application of the catalyst. The method comprises the following steps that bismuth nitrate pentahydrate is added in water, the adding amount is 0.4g / 15mL to 0.5g / 15mL according to the volume of the water, stirring is conducted for 15 to 20 min, and stirring is conducted continuously for 5 to 15 min to form mixing solution; then the mixing solution is added into a linear made of teflon to conduct hydrothermal reaction; cooling is conducted after the reaction is finished, centrifugation is conducted, sediment is obtained, and the bowknot-shaped fluorine-oxygen-bismuth photocatalyst BI7F1105 is obtained by drying and washing. The method for preparing the bowknot-shaped fluorine-oxygen-bismuth photocatalyst has the advantages that the prepared bowknot-shaped fluorine-oxygen-bismuth photocatalyst can be existed stably, the form is good, the bowknot-like shape is not reported ever, and the ability of catalytic degradation on organic matters is higher than that of the normal TiO2 catalyst.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
A low-energy chemical field-driven organic pollutant degradation catalyst and its application
ActiveCN109248680BGood degradation treatment effectImprove stabilityWater/sewage treatment by irradiationWater treatment compoundsNitro compoundIridium
The invention relates to the field of environmental protection, and discloses a catalyst for degrading organic pollutants driven by a low-energy chemical field and an application thereof. The catalytic system of the invention can efficiently degrade various organic pollutants such as azo dyes and nitro compounds without providing external energy. The catalytic system uses formate as an auxiliary agent, and the catalytic material is mainly palladium, silver, gold, platinum, iridium, etc., which are loaded on the surface of the carrier oxide. When the root ion contacts with the transition noble metal interface, the C-H bond in the formate radical breaks to form active oxygen species. The active oxygen species include hydroxyl radicals, hydrogen peroxide radicals, carbonate radicals, etc., and the generated free radicals quickly absorb The organic matter is oxidized to naturally degradable small molecules, even non-toxic water, CO 2 Or carbonate, the organic pollutant degradation treatment method of the present invention has extremely high efficiency, low cost, and the catalytic system is stable and the recycling rate is high.
Owner:浙江国千环境技术发展有限公司
In2O3 photocatalyst for degrading perfluorooctanoic acid and preparation method thereof
PendingCN114100603AHigh catalytic degradation activityDirect oxidative degradationWater/sewage treatment by irradiationWater treatment compoundsPerfluorooctanoic acidPhoto catalysis
The invention relates to the technical field of photocatalysts, and particularly discloses an In2O3 photocatalyst for degrading perfluorooctanoic acid and a preparation method of the In2O3 photocatalyst. The preparation method comprises the following steps: S1, dissolving indium salt and urea in water to form a precursor solution; s2, heating and reacting the precursor solution, and separating to obtain a solid; and S3, taking the solid, and calcining to obtain the In2O3 photocatalyst. The invention also discloses an application of the In2O3 photocatalyst in the treatment of refractory organic pollutants. The space group of the In2O3 photocatalyst provided by the invention is Ia-3, the exposed crystal faces comprise {110} Ia-3 and {111} Ia-3, and the In2O3 photocatalyst provided by the invention has more suitable surface interaction strength and higher catalytic degradation activity under the combined action of the two exposed crystal faces, and can be used for strengthening treatment of nondegradable organic matters such as perfluorooctanoic acid.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
A z-mechanism rich in oxygen vacancies bi 2 o 3 @ceo 2 Photocatalyst and its preparation method and application
InactiveCN110124660BWon't fit inEasy to prepareDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsPtru catalystOxygen vacancy
The present invention proposes a Z-mechanism Bi that is rich in oxygen vacancies 2 o 3 @CeO 2 A photocatalyst and its preparation method and application belong to the field of photocatalysis technology, and the method includes 1) preparing a reaction liquid; 2) preparing a catalyst precursor body liquid; 3) N 2 Preparation of Intermediate Bi@CeO by High Temperature Calcination in a Protected Tube Furnace 2 ; 4) Preparation of Z-mechanism Bi rich in oxygen vacancies 2 o 3 @CeO 2 Photocatalyst; the catalyst is nanosheet-like Bi 2 o 3 CeO attached to the curd 2 The curd structure formed on the particle, the oxygen-vacancy-rich Z-mechanism Bi prepared by the method of the present invention 2 o 3 @CeO 2 Photocatalysts can be applied to degrade NOx in the air under visible light conditions, which not only have high degradation rate and long activity retention time, but also the intermediate product NO 2 The yield is small, and the products formed by degradation are low or non-toxic, and will not cause secondary pollution to the air.
Owner:SHAANXI NORMAL UNIV
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