46results about How to "Efficient Photocatalytic Degradation" patented technology

The invention relates to semiconductor nano function material synthesizing methods, particularly to a simple bismuth oxyiodide quantum dot photocatalyst synthesizing method. The simple bismuth oxyiodide quantum dot photocatalyst synthesizing method comprises adjusting the oil-phase and water-phase proportion of microemulsion, adding in bismuth nitrate and potassium iodide under stirring conditions, and performing uniform mixing to obtain controllable bismuth oxyodide quantum dots, wherein the volume ratio of the oil phase and the water phase is 2500-6400:1. The simple bismuth oxyiodide quantum dot photocatalyst synthesizing method is simple and takes only one step; reaction is achieved at room temperature and saves heating processes, thereby being low in energy consumption; short reaction time, uniform quantum dot material granularity and high yield rate can be obtained. The prepared bismuth oxyiodide quantum dots obtain efficient photocatalytic organic pollutant degradation capacity and utilization potential in the fields of environment pollution treatment and the like.

The invention discloses a preparation method of a composite p-n type heterojunction photocatalyst and a VOCs photocatalytic degradation method. The composite p-n type heterojunction photocatalyst is asilver / silver oxide co-doped titanium dioxide composite p-n type heterojunction photocatalyst, is prepared by an in-situ precipitation reduction method, silver series (Ag0 / Ag2O) co-doping is realized, the electron-hole separation efficiency of the catalyst is improved, and the photoresponse range is widened, so that the purpose of efficient and stable photocatalytic degradation of VOCs gas underthe ultraviolet-visible light condition is achieved.

The invention discloses a method for treating landfill leachate by utilizing a photocatalysis biological adsorbent. The method comprises the following steps: mixing the photocatalysis biological adsorbent with the landfill leachate, carrying out illumination oscillation adsorption degradation, and completing treatment on the landfill leachate, wherein the photocatalysis biological adsorbent comprises phanerochaete chrysosporium fungus balls, graphite type C3N4 and calcium alginate, and the graphite type C3N4 wraps the phanerochaete chrysosporium fungus balls by virtue of calcium alginate. The method disclosed by the invention has the advantages of low cost, simple operation, short period and easiness in separation and has good adsorption degradation effect on organic pollutants in the landfill leachate.

A hierarchical pore nanoporous copper loaded cuprous oxide nanowire composite material is a thin belt and comprises an amorphous matrix, nanoporous copper which covers the amorphous matrix, and a porous cuprous oxide nanowire which is loaded on the surface of the nanoporous copper, wherein the cross section of the composite material is of a five-layer structure, and the intermediate core layer isthe amorphous matrix; the nanoporous copper covers the surfaces of two sides of the intermediate core layer; the porous cuprous oxide nanowire is loaded on the surface of the nanoporous copper at thetwo sides; the nanoporous copper layer at one side is 6-12 microns in thickness; the flexible belt is 20-40nm in width; the pore diameter is 15-30nm; the nanowire layer at one side is 3-12 microns inthickness; the nanowire is 5-10 microns in length and 5-10nm in width; nanopores being 0.5-2nm are distributed in the nanowires. The method is simple in processes, and short in preparation period; theprepared composite material is high in mechanical completeness and can be recycled, so that the economic benefit is improved.

The invention provides a method for preparing an Ag / AgCl / BiMg2VO6 composite photocatalyst with a visible light photocatalytic activity. The method is characterized in by comprising the following steps: obtaining a BiMg2VO6 base material from the raw materials: bismuth nitrate pentahydrate, magnesium nitrate hexahydrate, and ammonium metavanadate, by a sol-gel method; adding BiMg2VO6 into deionized water and then ultrasonically treating the mixed solution; then, slowly dropwise adding 0.1 mol / L silver nitrate solution at a proportion of 1 to 3 mmol / g of Ag / BiMg2VO6 and then ultrasonically treating the mixed solution for 10 min, and stirring the mixed solution for 20 min at room temperature in the dark; slowly adding 0.1 mol / L hydrochloric acid solution into the mixed solution at a mole ratio of 1:1 or 1:2 of H ions in the silver nitrate solution to H ions in the hydrochloric acid solution, ultrasonically treating and stirring the mixed solution to generate a AgCl / BiMg2VO6 composite photocatalyst; and optically reducing the AgCl / BiMg2VO6 composite photocatalyst at an ultraviolet lamp of 20 W to obtain the Ag / AgCl / BiMg2VO6 composite photocatalyst. The composite photocatalyst prepared by the method has a high photocatalytic activity in visible light and a simple preparation process.

The invention discloses a zinc reagent and a preparation method and application thereof. An efficient zinc reagent catalyst is synthesized by taking 1, 1-bis (1-methylimidazole thione) methane and zinc perchlorate as raw materials. Compared with the prior art, the zinc reagent has the advantages of simple process, simplicity and convenience in operation, low cost and the like, and the zinc reagent can perform photocatalytic degradation on azo type colored compounds efficiently, has good catalytic activity for methyl orange and can be recycled many times. In the aspect of treatment of organic sewage, the zinc reagent has good industrial application prospects.

The invention discloses a cadmium coordination polymer of hydroxypyrazole carboxylate for visible light catalytic degradation of organic dyes and its preparation and application. The chemical expression of the cadmium coordination polymer is [Cd(hpcH)(H 2 O)(DMF)] n , where hpcH 3 is a 5-hydroxypyrazole-3-carboxylic acid containing 1 metal Cd per asymmetric unit 2+ ion, a deprotonated organic ligand (hpcH 2‑ ), a coordinated water molecule and a coordinated DMF molecule, Cd 2+ The ions are linked by 5-hydroxypyrazole-3-carboxylic acid ligands to form a two-dimensional layered structure. The synthesis method of the cadmium coordination polymer is simple and the yield is high; it has stable photocatalytic dye degradation performance at room temperature, can efficiently photocatalyze the degradation of methylene blue (MB) azo dye, and has a high recycling rate; at the same time, the The structure of the polymer is stable, insoluble in water and common organic solvents, which can avoid secondary pollution problems.

The invention discloses a bismuth tungstate modified magnetic separation hollow composite photocatalyst, which is composed of ZnFe 2 o 4 , Fe 2 o 3 and Bi 2 WO 6 Composite; the particle size of the hollow microspheres is 50-1000nm, and the thickness of the hollow shell is 1-100nm. The invention also discloses its preparation method: preparing phenolic resin microspheres by hydrothermal reaction; adding them into the mixed solution of iron salt and zinc salt for ultrasonication, aging and calcining to obtain C@ZnFe 2 o 4 ‑Fe 2 o 3 microspheres; the C@ZnFe 2 o 4 ‑Fe 2 o 3 Microspheres soaked in Bi(NO 3 ) 3 and Na 2 WO 4 It can be obtained by ultrasonication, aging and calcination in mixed ethylene glycol solution. The photocatalyst of the present invention can efficiently photocatalyze and degrade toxic and harmful substances under sunlight and ultraviolet light, and the degradation rate is close to 100%, and ZnFe 2 o 4 It has magnetism, is easy to separate and recover, and has a simple preparation method.

The invention discloses a silver phosphate modified magnetic separation hollow composite photocatalyst, which is composed of ZnFe 2 o 4 , ZnO and Ag 3 PO 4 Composite; the particle size of the hollow microsphere is 50-1000nm, and the thickness of the hollow shell is 1-100nm. The invention also discloses its preparation method: mixing zinc salt and iron salt solution into phenolic resin microspheres, ultrasonic aging, drying, calcining, and then adding AgNO 3 Ethanol solution and Na 3 PO 4 Ethanol solution, stirring, and drying. The present invention consists of ZnFe 2 o 4 , ZnO and Ag 3 PO 4 It forms a heterojunction with a waterfall structure, which promotes the effective separation of photogenerated electrons and holes, thereby improving its photocatalytic activity; ZnFe 2 o 4 It has magnetism, is easy to separate and recover, and has a simple preparation method.

The invention discloses a nano-porous copper loaded ultrafine oxide copper nanowire composite material and a preparation method and application thereof. The material is a rod, and comprises an amorphous basal body, nano-porous copper covering the amorphous basal body, and ultrafine copper oxide nanowires loaded on the surface of the nano-porous copper; the amorphous basal body is CuxZryAlz alloy component, wherein x, y and z are atomic percents; x is not bigger than 50 and not smaller than 45, y is not bigger than 50 and not smaller than 45, z is not bigger than 10 and not smaller than 5; x+y+z is 100; the nano-porous copper has the layer thickness of 85-135 microns, the ligament width of 118-138 nm and the aperture size of 30-100 nm; the nanowires are 4-10 microns long and 5-15 nm wide; and every 20-30 nanowires are clustered as one bundle. The copper oxide nanowires are constructed on the nano-scale basal body for the first time. Nanowire copper oxide is tightly combined with the surface of the nano-porous copper metal, so that the prepared material achieves efficient photocatalytic degradation of organic dye.

A nanoporous copper-loaded porous cuprous oxide nanosheet composite material, the composite material is a rod, including an amorphous substrate, nanoporous copper covered on the amorphous substrate, and porous cuprous oxide nanosheets supported on the surface of the nanoporous copper sheet; the amorphous matrix is ​​Cu x Zr y Ti z al w Alloy composition, where x, y, z, and w are atomic percentages, 45≤x≤50, 20≤y≤25, 25≤z≤30, 5≤w≤10 and x+y+z+w=100; where The thickness of the nanoporous copper layer is 80-140 μm, the ductile bandwidth is 110-140 nm, and the pore size is 40-100 nm; the thickness of the nano-sheet is 50-90 nm, the length of the nano-sheet is 30-80 nm, and the width is 5-10 nm. 4nm. The preparation process of the invention is simple and the preparation period is short; the prepared composite material has good mechanical integrity and thermal stability, can be recycled and reused, and the economic benefit is improved.

The present invention relates to a Bi 2 o 3 / (BiO) 2 CO 3 The invention relates to a synthesis method of a composite photocatalytic material, which belongs to the technical field of chemical industry. Using Na 2 CO 3 , bismuth citrate, and NaOH three kinds of chemical reagent raw materials are weighed according to the molar ratio, mixed into double distilled water and stirred for a certain period of time. After drying to obtain the final product Bi 2 o 3 / (BiO) 2 CO 3 Composite photocatalytic materials. Its surface morphology, microstructure, and photocatalytic activity were measured, and the hierarchical rosette Bi 2 o 3 / (BiO) 2 CO 3 The composite photocatalytic material has a great improvement in the degradation of rhodamine B and other dyes under different light sources. The production process of this product is simple and practical, the product performance is stable, and it has considerable applicability to various dyes.

The invention provides a synthesis method and application for imprinting-doped mesoporous TiO2 microspheres. The synthesis method includes dissolving 1-5ml of titanium source substances into 100-200ml of organic solution, adding 0.1-0.3g of catalytic into the organic solution, adding 0.1-0.5g of target molecules used as imprinting molecules while stirring the mixture, and further adding metal salt with the molar ratio ranging from 0.1% to 8% relative to a titanium source so as to introducing doping ions; and continuing stirring for 1-12 hours, then enabling the solution to react in a high-temperature and high-pressure kettle at the temperature ranging from 80 DEG C to 180 DEG C for 3-6 hours, centrifugally washing to obtain white solid, placing the white solid in a muffle furnace at the temperature ranging from 400 DEG C to 450 DEG C, keeping the temperature for 2-4 hours and then obtaining the imprinting-doped mesoporous TiO2 microspheres. The prepared materials are used for degrading target organic pollutant in water, have higher photocatalytic activity as compared with pure TiO2(P25), and are capable of selectively degrading the target pollutant. In addition, the imprinting-doped mesoporous TiO2 microspheres have a wider photoresponse range as compared with pure TiO2 undoped with imprinting, and have high visible light absorption capacity.