1665 results about "Photo catalytic" patented technology

The invention belongs to the technical field of organic photoelectric materials, and particularly relates to preparation and application of a benzoselenadiazole covalent organic framework material. According to the invention, benzoselenadiazolyl tetraaldehyde is used as a construction unit, o-toluidine, 4, 4 '-biphenyl diamine or 3, 3'-dihydroxybenzidine is used as a connecting body, and three kinds of novel rigid COFs, namely HBU-COF-CH3, HBU-COF-H and HBU-COF-OH, are synthesized in sequence. The COFs has high cycling stability, has outstanding advantages in the aspect of sustainable heterogeneity of molecular catalysts, and can be used as a heterogeneous photocatalyst to realize efficient hydrogen peroxide production under visible light, and the photocatalytic hydrogen peroxide production performance of the COFs is superior to that of most reported COFs materials. Wherein the yields of HBU-COF-CH3, HBU-COF-H and HBU-COF-OH are as high as 12910 [mu] mol g <-1 > h <-1 >, 8838 [mu] mol g <-1 > h <-1 > and 7679 [mu] mol g <-1 > h <-1 > in sequence.

The invention provides an activated carbon fiber capable of efficiently removing formaldehyde and a preparation method thereof, the activated carbon fiber is of a composite material fiber structure of porous TiO2 derived from activated carbon and a metal organic framework (MOF), and the preparation method of the composite material comprises pretreatment of activated carbon, preparation of a Ti-MOF precursor and preparation of TiO2 / activated carbon fiber. According to the invention, the MOF-derived porous TiO2 / activated carbon composite fiber structure is constructed, physical adsorption and photocatalytic degradation functions are cooperated, and the limitation of single adsorption capacity is broken through; the interface bonding problem of the MOF derivative and the activated carbon is solved, and high-dispersion loading and stable and firm compounding of the active components are realized; a process path capable of realizing large-scale preparation is provided, and continuous production of the composite fiber is realized through an electrostatic spinning technology.

The invention discloses a method for preparing a carbon monoxide oxidation catalyst by using a waste vanadium-titanium catalyst and electroplating sludge, which realizes the mutual reaction of metal components in the electroplating sludge and components in the waste vanadium-titanium catalyst through the synergistic effect of various physical and chemical treatment methods and additives in the whole preparation process. The complex multi-metal catalyst can be used for photo-catalytic oxidation of carbon monoxide, has a remarkable oxidation effect and has a good application prospect.

The invention relates to the technical field of preparation of catalysts, in particular to a catalyst for in-situ capture of carbon dioxide, a preparation method of the catalyst and application of the catalyst to preparation of methanol from methane, and the preparation method comprises the following steps: S1, mixing and stirring Bi (NO3) 3.5 H2O, dilute nitric acid and an adsorption modifier; s2, filtering to obtain a white precipitate, drying, slowly heating to 450 DEG C in a muffle furnace, and keeping the temperature for 20-30 minutes to obtain a faint yellow solid; s3, dispersing in a modified dissolving solution, sealing the reactor, and purging with argon for 10-15 minutes; and S4, injecting CH4, reacting for 2 hours under the irradiation of a xenon lamp, washing a solid obtained by suction filtration with deionized water, and drying at 60 DEG C for 10-12 hours to obtain the high-performance catalyst. The invention aims at the field of preparation of high-value chemicals from photocatalytic methane, solves the problem of generation of carbon dioxide by peroxidation of methane, and captures the peroxidation product carbon dioxide through the cooperation of the adsorption modifier and the modified dissolving solution to inhibit peroxidation of methane.

The invention discloses a method for preparing a bismuth ferrite composite catalytic material by using red mud as well as a product and application of the bismuth ferrite composite catalytic material. The method comprises the following steps: mixing chlorine salt and red mud, uniformly stirring, adding a hydrochloric acid solution, uniformly stirring, roasting, recovering flue gas generated in the roasting process, and obtaining roasting residues and roasting dust generated by recovering the flue gas after roasting is finished; and mixing the roasted dust and bismuth nitrate, uniformly stirring, adding the calcined residue, uniformly grinding, adding water, stirring, drying the material, and calcining to obtain the bismuth ferrite composite catalytic material. The preparation process is simple, the red mud is used as a main raw material, and full-amount resource utilization of the red mud can be achieved. The prepared composite catalytic material can be used for efficiently purifying landfill leachate, and COD, ammonia nitrogen, total phosphorus and heavy metal pollution are efficiently removed through a photocatalysis mechanism.

The invention relates to a preparation method and application of a porous material for preparing methanol through carbon dioxide adsorption and conversion. When the material is prepared, firstly, 4, 4 '4' '-(1, 3, 5-triazine-2, 4, 6-trimethylene) triphenylamine and 1, 2-acenaphthequinone are treated in a mixed solvent containing dioxane / acetonitrile / 6M acetic acid, and AT-COF is obtained; further synthesizing by adopting an impregnation method to obtain IrRu-COF; and finally, uniformly mixing the active gamma-aluminum oxide and the IrRu-COF material to form a carrier dispersion liquid, and then carrying out PEI loading, vacuum impregnation, washing and drying to obtain the PEI functionalized gamma-Al2O3 / COF composite catalyst. The technical closed loop from low-concentration CO2 capture to solar driven conversion is realized, the process flow is simple, and the energy consumption is low.

The invention relates to the technical field of material science and engineering, and discloses a nanocellulose-based oil-water separation and adsorption composite material, which is prepared from the following raw materials in parts by mass: 35 to 45 parts of nanocellulose; 8 to 11 parts of bagasse cellulose; 10 to 15 parts of sodium lignin sulfonate; 4 to 8 parts of chitosan; 5-10 parts of oxidized starch; 5 to 8 parts of cellulose nanowhiskers; 2-5 parts of silicon dioxide nanoparticles; 0.5 to 1 part of calcium carbonate nanoparticles; 1-2 parts of a citric acid cross-linking agent; 1-2 parts of graphene oxide; 0.3 to 0.6 part of ethylene diamine tetraacetic acid; 2-5 parts of glycerol; 0.4 to 1 part of stearoyl chloride; 2-4 parts of nano iron oxide; the preparation method comprises the following steps: pretreating the raw materials, mixing the pretreated raw materials into slurry, carrying out crosslinking and ultrasonic dispersion, standing to obtain a basic mixture, injecting the basic mixture into a mold, carrying out freeze drying to form a photocatalytic layer, carrying out centrifugal dewatering, carrying out chelation reaction, spraying a composite solution, and carrying out vacuum drying to obtain the photocatalytic material. The obtained composite material has the advantages of efficient adsorption capacity, good mechanical properties, environmental friendliness, degradability and low preparation cost.

The invention discloses a method for preparing a catalyst by using red mud and titanium dioxide acidolysis waste residues as well as a product and application thereof. The method comprises the following steps: calcining red mud, adding titanium dioxide acidolysis waste residues and an auxiliary agent, uniformly stirring, adding a desulfurization waste liquid, uniformly stirring, carrying out a hydrothermal reaction, carrying out solid-liquid separation, and calcining to obtain the catalyst material. The preparation process is simple, and efficient resource utilization of the red mud and the titanium dioxide acidolysis waste residues can be achieved. The catalyst prepared through a hydrothermal reaction and a secondary calcination process realizes efficient removal of COD, ammonia nitrogen, total phosphorus and heavy metal pollutants in waste liquid through a photocatalytic function.

The invention discloses a ternary chalcogenide heterojunction catalytic material as well as a synthesis method and application thereof, and belongs to the field of photocatalysts. The synthesis method comprises the following steps: dissolving ZnCl2 and InCl3. 4H2O in an ethanol water solution, stirring, adding thioacetamide into the mixed solution, continuously stirring, carrying out hydrothermal reaction, cooling, centrifuging and washing on the solution, and drying to constant weight to obtain a material Zn2In2S5; the preparation method comprises the following steps: dispersing Zn2In2S5, thiourea, 1-hexadecyl-3-methylimidazole bromide and Bi (NO3) 3.5 H2O in absolute ethyl alcohol, carrying out ultrasonic dispersion, carrying out a hydrothermal reaction on the mixture, cooling, centrifuging, washing, and drying to constant weight to obtain the powder material Zn2In2S5 / Bi19S27Br3. The photocatalytic activity is greatly improved by constructing the heterojunction, pollutant degradation is achieved, and the photocatalyst has the advantages of being good in stability and capable of being repeatedly used.

The invention discloses a method for preparing formaldehyde through photocatalytic methane selective oxidation, and relates to the technical field of formaldehyde preparation. The method comprises the following steps: ultrasonically dispersing a titanium dioxide supported copper monatomic catalyst into water, adding into a reaction kettle, sequentially introducing oxygen and methane into the reaction kettle until the required pressure is reached, and stirring and reacting for a period of time under an illumination condition to obtain formaldehyde and other oxidation products, in the reaction process, the dosage of the titanium dioxide supported copper monatomic catalyst is 0.1-10 mg, and the dosage of the water solvent is 0-100 mL; the catalyst is a titanium dioxide supported copper monatomic catalyst. According to the method, methane is used as a raw material, oxygen is used as an oxidizing agent, methane is selectively converted into formaldehyde under the combined action of illumination and the titanium dioxide supported copper monatomic catalyst, the obtained formaldehyde has high generation rate and selectivity, the reaction process is green and economical, and the method has wide application prospects.

The invention relates to a method for synthesizing tetrasubstituted-1, 3-allene dicarboxylic acid, and discloses a method for synthesizing tetrasubstituted-1, 3-allene dicarboxylic acid by taking 1, 3-enyne and iodide as raw materials, potassium formate as a formate source, DABCO as a hydrogen transfer catalyst, Ir (bpy) 2 (dtbpy) PF6 as a photocatalyst and cesium carbonate as alkali through the following steps: introducing CO2 at normal pressure; the allene dicarboxylic acid compound can be obtained at excellent to good yield under the irradiation of visible light at room temperature for 24 hours, the reaction condition is mild, the regioselectivity is good, the functional group tolerance is good, and many defects in the prior art are overcome.

The invention discloses a water body heavy metal ion pollution treatment adsorption filtering membrane and a preparation method thereof, and relates to the technical field of water treatment. When the water body heavy metal ion pollution treatment adsorption filtering membrane is prepared, graphene oxide sequentially reacts with 3-diethylaminopropylamine, tetrabromophenyl porphyrin and N, N-diethyl allylamine, and functionalized graphene oxide is prepared; the preparation method comprises the following steps: reacting cellulose with 4 '-bromo-2, 2': 6 ', 2' '-terpyridyl and maleic anhydride in sequence to prepare modified cellulose; the preparation method comprises the following steps: reacting sodium alginate with propylene oxide to prepare modified sodium alginate; the modified sodium alginate, the modified cellulose, the functionalized graphene oxide, trans, trans-1, 3-butadiene-1, 4-dicarboxylic acid and a photoinitiator are subjected to a reaction, a membrane is prepared, and the water body heavy metal ion pollution treatment adsorption filtering membrane is prepared. The water body heavy metal ion pollution treatment adsorption filtering membrane prepared by the invention has good antibacterial and photocatalytic organic matter degradation capabilities.

A method of making a covalent organic framework includes continuously feeding a first precursor and a second precursor to a flow reactor; heating, and mixing the first and second precursors; nucleating and growing the covalent organic framework; and continuously outputting the covalent organic framework from the third section of the flow reactor. A photo-reactor for treating contaminated water includes: a light source; an enclosed channel around the light source; a cover comprising one or more lights illuminating the enclosed channel; and a covalent organic framework cased within the enclosed channel, where the covalent organic framework is photo-catalytically active for degrading a contaminant in the contaminated water so as to produce treated water. A method of treating contaminated water includes feeding the contaminated water to the photo-reactor and contacting the contaminated water with the covalent organic framework.

The invention discloses a method for regenerating lithium iron phosphate in an electrode material. The method comprises the following steps: adding electrode material powder containing lithium iron phosphate, a photocatalyst and glacial acetic acid into water, and uniformly mixing to obtain a first reaction solution; introducing oxygen into the first reaction solution to obtain a second reaction solution; illuminating the second reaction liquid to perform a photocatalytic reaction to obtain a third reaction liquid; filtering and separating the third reaction liquid into filtrate and filter residues, drying the filter residues to obtain iron phosphate, adding a saturated sodium carbonate aqueous solution into the filtrate, heating and reacting, filtering, and taking precipitate to obtain lithium carbonate; and mixing the iron phosphate and the lithium carbonate, and calcining to obtain regenerated lithium iron phosphate. According to the method, the lithium iron phosphate battery is recycled by utilizing a photocatalytic means with mild reaction conditions, the operation process is simple, and the pollution of the generated wastewater is reduced. According to the method, the leaching rates of lithium and iron can reach 94.81% and 2.9%, efficient recovery of lithium carbonate and iron phosphate is achieved, and then the recovery efficiency of lithium iron phosphate is improved.

The invention discloses a method for degrading polystyrene (PS) plastic and upgrading and recycling the PS plastic into benzoic acid based on nano MnO2 photocatalytic ozonation, and belongs to the technical field of solid waste recycling. The method comprises the following steps: firstly, mixing PS plastic fragments with nano MnO2 and an organic solvent, then simultaneously introducing ozone into a reaction system at normal temperature and normal pressure, and irradiating with light. Through synergistic catalysis of light and ozone, molecular chains of the PS plastic can be efficiently and selectively broken and oxidized, and finally the PS plastic is directionally converted into benzoic acid with high additional value. After the reaction is finished, a benzoic acid product can be obtained through simple separation, concentration and purification steps. The method provided by the invention realizes high-valued recycling of the waste PS plastic under mild conditions, solves the problems of high energy consumption, complex products, easy generation of secondary pollution and the like in a traditional treatment method, and has the outstanding advantages of green process, efficient reaction, high product value and the like.

The invention relates to the technical field of photocatalytic carbon dioxide reduction, in particular to a Ti < 3 > C < 2 > T < x > MXene / CuInSnS4 composite photocatalyst for photocatalytic carbon dioxide methanation. The reaction yield of photocatalytic reduction of carbon dioxide into methane by using a single CuInSnS4 catalyst is poor. In order to solve the problems, the invention provides the Ti3C2TxMXene / CuInSnS4 composite photocatalyst for photocatalytic carbon dioxide methanation, the Ti3C2TxMXene / CuInSnS4 composite photocatalyst is obtained by compounding Ti3C2TxMXene and CuInSnS4, and the addition of the Ti3C2TxMXene enhances the conductivity of the composite material, inhibits the compounding of photo-induced electrons and holes to a certain extent, and is more beneficial to the proceeding of photocatalytic carbon dioxide reductive methanation reaction.

The invention discloses a method for adjusting a TS-1 molecular sieve through a plasma treatment technology and application, and relates to the technical field of TS-1 molecular sieve treatment. The method comprises the following steps: S1, preprocessing a TS-1 sample; s2, selecting treatment gas, and presetting treatment conditions; s3, plasma treatment equipment is selected, and the pretreated TS-1 sample is laid according to a certain thickness; s4, processing according to a preset processing condition; and S5, post-processing and testing. The invention discloses a method for adjusting a TS-1 molecular sieve by a plasma treatment technology and application of the TS-1 molecular sieve, and the treated modified TS-1 molecular sieve has advantages in a Beckmann rearrangement reaction compared with a parent conversion rate and selectivity; loaded metals such as copper, cobalt and iron are used for a carbon dioxide and hydrogen reduction reaction, and compared with a matrix, the conversion rate and methanol selectivity are higher; the supported metals such as copper, cobalt, indium, platinum and palladium are used for photocatalytic reaction of carbon dioxide and water, and compared with a parent, the conversion rate and alcohol selectivity are higher.

The invention discloses a monatomic catalyst capable of retaining surface defects of a catalyst as well as a preparation method and application of the monatomic catalyst, and belongs to the field of catalysis. The monatomic catalyst comprises an active metal component, a doping element and a carrier, the carrier is a semiconductor material rich in surface defects. The preparation method adopts a light-induced migration-conversion strategy. The monatomic catalyst which is obtained by the preparation method and retains the surface defects of the semiconductor material is applied to the fields of photocatalysis, thermocatalysis and electrocatalysis, and shows excellent performance.

The invention relates to a manganese zinc ferrite composite magnetic catalyst and a preparation method thereof. The preparation method comprises the following steps: adding manganese nitrate, zinc nitrate and ferric nitrate into deionized water to form a metal ion solution; the preparation method comprises the following steps: adding ethylenediaminetetraacetic acid into a metal ion solution to form sol, performing heating dehydration treatment, grinding, and performing heat treatment to obtain manganese zinc ferrite nanoparticles; dissolving calcium nitrate, indium nitrate and thioacetamide in deionized water, then adding the manganese zinc ferrite nanoparticles to obtain a suspension of a reaction mixture, carrying out hydrothermal reaction, and carrying out subsequent extraction treatment to obtain the manganese zinc ferrite composite magnetic catalyst. The composite magnetic catalyst is prepared by utilizing a two-step hydrothermal method, the photocatalytic performance of the composite magnetic catalyst is remarkably improved, and the composite magnetic catalyst can be quickly and completely recycled through magnet adsorption, so that the photocatalytic performance of a single catalyst is improved, and quick recycling and cyclic utilization of the photocatalyst are realized; and the application cost of photocatalysis is reduced.

The invention discloses a preparation method of a boron-dipyrrolyl porous organic polymer and application of the boron-dipyrrolyl porous organic polymer in photocatalytic production of hydrogen peroxide. The boron-dipyrrolyl porous organic polymer is a cyano-containing boron-dipyrrolyl porous organic polymer. The preparation method comprises the following steps: carrying out a Sonogashira coupling reaction on an electron acceptor boron dipyrromethene derivative and an electron donor compound to prepare a boron dipyrromethene-based porous organic polymer containing acetylenic bonds; and carrying out free radical reaction modification on the BODIPY porous organic polymer containing the acetylenic bond to prepare the BODIPY porous organic polymer containing the cyano group. The preparation method comprises the following steps: polymerizing an electron acceptor boron dipyrromethene and different electron donors by utilizing a Sonogashira coupling reaction to obtain a boron dipyrromethene-based porous organic polymer containing an acetylenic bond, and carrying out post-modification on the acetylenic bond through a free radical reaction to obtain the boron dipyrromethene-based porous organic polymer containing cyano groups with good photocatalytic performance. The polymer can be used for photocatalytic production of hydrogen peroxide in water.

The invention discloses a photosensitive metal-organic coordination nanocage material as well as preparation and application thereof. The photosensitive metal-organic coordination nanocage material comprises a photosensitive ligand, metal ions and counter anions. According to the metal-organic coordination nanocage material, pure water can be decomposed into hydrogen and hydrogen peroxide only through ultrasound and illumination under the condition that a sacrificial agent is not added, and the metal-organic coordination nanocage material has efficient piezoelectric electro-catalytic performance.

The invention relates to the field of preparation of quantum dot cuprous oxide, in particular to a simple preparation method and application of high-dispersion cuprous oxide quantum dots, and the method comprises the following steps: mechanically grinding commercial P25 serving as a carrier catalyst and copper chloride in an agate mortar, uniformly mixing, adding hydrazine hydrate, continuously grinding for 30 minutes, washing the obtained solid product with deionized water, and drying to obtain the high-dispersion cuprous oxide quantum dots. And drying at room temperature to obtain the cuprous oxide quantum dots uniformly dispersed on the TiO2 carrier. The preparation method of the metal quantum dots is simple and convenient, the raw materials are simple and easy to obtain, repeatability is good, and the metal quantum dots are highly dispersed. The material prepared through the method can remarkably improve the photocatalytic hydrogen evolution and nitrogen reduction efficiency of a carrier catalyst. The method has a wide application value in the creation of the quantum dot catalyst in the field of sustainable energy sources such as photocatalysis.

The invention discloses a barium ion single-doped / double-doped brookite titanium dioxide nanorod catalyst as well as preparation and application, the catalyst synthesized by a thermal decomposition method comprises brookite phase titanium dioxide and doped barium ions, and the nanorod-shaped catalyst containing oxygen vacancy defects has the width of 4-6 nanometers and the length of 20-50 nanometers. The piezoelectric property of brookite titanium dioxide is induced through doping of barium ions, charge separation is promoted through a built-in electric field, meanwhile, oxygen vacancies are induced through a charge compensation mechanism, the piezoelectric catalysis and photocatalytic efficiency is promoted, and the problems mentioned in the background technology are solved.

The invention relates to the technical field of preparation of bird inhabitation bricks, in particular to a bird inhabitation brick capable of conducting drainage, gradient dynamic adsorption of organic matter and blocking and filtering water through heavy metal and a preparation method thereof.The preparation method comprises the steps that S1, a photocatalytic purification layer, a biological filtering layer and an adsorption stabilizing layer are formed and then subjected to demolding treatment, and the upper surface of each layer of brick body is removed; the other surfaces are subjected to anti-seepage treatment; s2, sequentially splicing a photocatalytic purification layer, a biological filtering layer and an adsorption stabilizing layer from top to bottom, accurately butting the ceramic pipe buckle parts of each layer, and splicing the three layers of bricks into a whole ecological combined brick, so as to obtain the bird inhabiting brick for guiding and discharging, dynamically adsorbing organic matters in a gradient manner and blocking and filtering water by heavy metals. According to the invention, pollutants flowing into the brick body can be effectively treated through the synergistic effect of gradient pores, large-particle pollutants are intercepted by macropores on the surface layer, decomposed organic matters are adsorbed by mesopores in the biological filter layer, and dissolved pollutants such as heavy metal ions and the like are fixed by the adsorption stabilizing layer.

The invention discloses a phenanthridine-6-formaldehyde derivative and a preparation method and application thereof.The preparation method comprises the steps that 2, 4, 5, 6-tetra (9-carbazolyl)-isophthalonitrile serves as a photocatalyst, 1-azabicyclo [2.2. 2] octane serves as a hydrogen atom transfer catalyst, a biphenyl isocyanide compound, the photocatalyst, the hydrogen atom transfer catalyst and an alkali additive are jointly dissolved in 1, 3-dioxolane, the mixture is stirred to be uniform, and the phenanthridine-6-formaldehyde derivative is obtained. And carrying out free radical tandem cyclization and acid-catalyzed hydrolysis reaction to obtain the phenanthridine-6-formaldehyde derivative. The invention also provides a specific reaction equation. According to the developed synthesis method of the phenanthridine-6-formaldehyde derivative, the compound can be efficiently and conveniently prepared, the technical bottlenecks of harsh reaction conditions and tedious steps in a traditional process are successfully overcome, raw materials which are low in price and easy to obtain are adopted, operation is carried out under mild conditions, the synthesis method has the outstanding advantages of being high in yield, safe and simple to operate, environmentally friendly and the like, and the method is suitable for industrial production. Good industrial application potential is shown.

The invention belongs to the technical field of photocatalytic materials, and discloses a preparation method of a BiOCl / BiOI composite photocatalyst for visible light degradation of rhodamine B. The energy band structure of BiOCl is regulated and controlled in cooperation with BiOI, and efficient photocatalytic decoloration of rhodamine B with wide spectral response is achieved through S-type interface charge transfer. A petal-shaped BiOCl / BiOI heterojunction with R = 8: 1, a BiOCl0. 88I0. 12 solid solution and a BiOCl0. 8I0. 2 solid solution show excellent visible light catalytic activity, and about 92.52% of rhodamine B molecules, 99.7% of rhodamine B molecules and 99.7% of rhodamine B molecules are respectively degraded by the BiOCl / BiOI heterojunction and the BiOCl0. 88I0. 12 solid solution after being irradiated by visible light for 10 minutes. The catalytic reaction accords with the two-stage one-stage kinetic law, and high photocatalytic efficiency can still be maintained after five times of circulation. The single BiOCl and BiOI respectively degrade about 64.3% and 10.02% of rhodamine B molecules under the same light reaction condition, and the catalytic reaction follows a first-level kinetic model. The preparation method has the advantages of being low in preparation temperature, simple in technological process, stable in chemical property and the like, the large-scale two-dimensional micron / nanosheet and the three-dimensional self-assembly structure of the large-scale two-dimensional micron / nanosheet can be obtained only through a hydrothermal and water bath synthesis technology, and the preparation method has great application value in the field of visible light degradation of organic pollutants.

The invention discloses a preparation method and application of an nNi / Rh (x)-La2O3 catalyst, and belongs to the technical field of catalysts. According to the technical scheme, the preparation method comprises the following steps: 1) preparing La2O3 carrier particles: screening lanthanum nitrate, dropwise adding a nitric acid solution into the lanthanum nitrate, mixing, drying and calcining; 2) preparation of Rh (x)-La2O3: adding the La2O3 carrier particles and Rh (NO3) 3.2 H2O into water, and stirring for reaction; drying and calcining to obtain an Rh (x)-La2O3 carrier; and 3) preparation of the nNi / Rh (x)-La2O3 catalyst: dispersing the Rh (x)-La2O3 carrier in water, adding Ni (NO3) 2.6 H2O into the Rh (x)-La2O3 carrier, stirring, adjusting the pH value, carrying out a reaction, cleaning and drying the precipitate, and calcining to obtain the nNi / Rh (x)-La2O3 catalyst. The nNi / Rh (x)-La2O3 catalyst has very high catalytic activity, and has a good application prospect in photocatalytic degradation of methyl acrylate.

The invention provides a red titanium dioxide out-phase junction as well as a preparation method and application thereof, and belongs to the technical field of material synthesis and renewable clean energy utilization. The preparation method of the red titanium dioxide out-phase junction comprises the following steps: forming a first precursor of B-doped titanium dioxide; calcining the first precursor at a high temperature to obtain a B-doped titanium dioxide out-phase junction second precursor; and mixing any one of (NH4) 2TiF6, NH4TiOF3 and (NH4) 2TiOF4 with the second precursor, and carrying out nitrogen treatment in an ammonia gas flow to obtain the rutile phase and anatase phase uniformly doped red titanium dioxide out-phase junction. According to the invention, titanium dioxide in a rutile phase can be nitrided through ammonium fluotitanate treatment, so that a red titanium dioxide out-phase junction uniformly doped with two phases of rutile and anatase is formed, and the red titanium dioxide out-phase junction shows relatively high water oxidation activity in a photocatalytic water decomposition reaction.

The invention discloses a porous organic polymer material, a preparation method of the porous organic polymer material and application of the porous organic polymer material in CO2 adsorption and photocatalytic preparation of H2O2, and belongs to the technical field of organic framework materials. The porous organic polymer material is prepared by the following method: adding a compound A and benzo [1, 2-B: 3, 4-B ': 5, 6-B'] trithiophene-2, 5, 8-trialdehyde into a solvent, and uniformly mixing; then adding a catalyst, and carrying out polymerization reaction under the condition of inert gas to obtain a polymerization reaction product; and washing and drying the reaction product to obtain the porous organic polymer material. The porous organic polymer material prepared by the invention is novel in structure, not only has excellent photoinduced charge separation and transmission efficiency, shows better advantages in the aspect of photocatalytic preparation of H2O2, but also has excellent CO2 adsorption performance, thereby having important value and significance for further expansion and application of organic framework materials.

The invention belongs to the technical field of preparation and application of materials, and particularly discloses a method for coating the surface of polyoxometallate with titanium dioxide and application, and the method comprises the following steps: providing polyoxometallate; according to the method, titanium source injection, inert gas purging, reaction gas injection and inert gas re-purging are used as an ALD cycle, multiple cycles are carried out under the same condition, and the titanium dioxide coating layer is deposited on the surface of polyoxometallate. The obtained titanium dioxide coating layer is compact and uniform, the polyoxometallate and the titanium dioxide coating layer cooperate with each other when the titanium dioxide coating layer is applied to the photocatalytic carbon dioxide reduction reaction, the catalytic activity is remarkably improved, and the defects that existing polyoxometallate is poor in stability, prone to agglomeration and the like are overcome in a targeted mode.