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A kind of bonding construction method of silver phosphate-based composite catalytic unit

A silver phosphate-based, catalytic unit technology, applied in the field of material chemistry, can solve the problems of reducing the amount of silver phosphate used and the unsatisfactory effect of visible light catalytic degradation of water, etc., and achieve the effects of optimized catalytic effect, stable structure, and large specific surface area

Inactive Publication Date: 2017-12-05
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a method for bonding and constructing a silver phosphate-based composite catalytic unit to obtain a new type of catalytic unit with superior catalytic performance and good stability, and at the same time solve the problem of the existing pure titanium dioxide or titanium dioxide-loaded catalysts that are not effective in catalytic degradation of water under visible light Ideal problem; the catalyst obtained by the present invention utilizes the advantages of the structural unit of the microsystem to effectively reduce the amount of silver phosphate used, and can catalyze and degrade organic pollutants under visible light irradiation, providing a new type of high-efficiency catalyst for environmental pollution control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Measure 10 mL of 0.5 mol / L NaH 2 PO 4 Put the aqueous solution in the Erlenmeyer flask, seal it with egg film, pour it upside down into a beaker filled with 10 mL of 1.5 mol / L silver nitrate solution, leave it at room temperature for 24 hours, and centrifuge to obtain the silver phosphate product. Place the obtained silver phosphate product in an aqueous solution of titanate, add ethanol for hydrolysis to produce hydroxide, and the generated hydroxyl group is combined with the hydroxyl group, carboxyl group and other groups contained on the surface of silver phosphate through hydrogen bonds, etc., and then 200 o C heat dehydration treatment, then compound the titanium dioxide on the surface of the silver phosphate crystal, and obtain the porous silver phosphate-based composite catalytic unit.

Embodiment 2

[0020] Measure 10 mL of 0.5 mol / L NaH 2 PO 4 Put the aqueous solution in the Erlenmeyer flask, seal it with egg film, put it upside down in a beaker filled with 10 mL of 1.5 mol / L silver nitrate solution, add 1 mL of 0.14 g / L Triton X-100 solution on both sides of the reaction solution, and keep at room temperature Place it under the hood for 24 hours, and centrifuge to obtain the silver phosphate product. Place the obtained silver phosphate product in an aqueous solution of titanate, add ethanol for hydrolysis to produce hydroxide, and the generated hydroxyl group is combined with the hydroxyl group, carboxyl group and other groups contained on the surface of silver phosphate through hydrogen bonds, etc., and then 200 o C heat dehydration treatment, then compound the titanium dioxide on the surface of the silver phosphate crystal, and obtain the porous silver phosphate-based composite catalytic unit.

Embodiment 3

[0022] Measure 10 mL of 0.5 mol / L NaH 2 PO 4 Put the aqueous solution in the Erlenmeyer flask, seal it with egg film, put it upside down in a beaker filled with 10 mL of 1.5 mol / L silver nitrate solution, add 1 mL of 0.14 g / L polyacrylamide solution on both sides of the reaction solution, and place it at room temperature for 24 Hours, centrifuged to obtain silver phosphate product. Place the obtained silver phosphate product in an aqueous solution of titanate, add ethanol for hydrolysis to produce hydroxide, and the generated hydroxyl group is combined with the hydroxyl group, carboxyl group and other groups contained on the surface of silver phosphate through hydrogen bonds, etc., and then 200 o C heat dehydration treatment, then compound the titanium dioxide on the surface of the silver phosphate crystal, and obtain the porous silver phosphate-based composite catalytic unit.

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Abstract

The invention belongs to the technical field of material chemistry, and in particular relates to a bonding construction method of a novel silver phosphate-based composite catalytic unit. First, a liquid film transport system is established combined with the regulation of small organic molecules to obtain a silver phosphate-based ordered porous structure with a regular and orderly shape and a large specific surface area, and a layer of nanometer-thick sharpened porous structure is obtained on the surface using molecular bonding technology. Titanium-type titanium dioxide constructs a silver phosphate / titanium dioxide heterostructure composite microsystem with compact structure and high degradation efficiency. The invention fully utilizes the excellent photocatalytic activity of silver phosphate, and uses visible light as a light source to rapidly degrade the organic pollutants on the surface of the silver phosphate-based composite microsystem. The new silver phosphate-based composite catalytic unit constructed by this method not only has an orderly structure and high degradation efficiency, but also greatly reduces the amount of silver phosphate used, effectively reduces the cost of use, and provides a new method for the treatment of organic pollutants. efficient catalyst.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a bonding construction method of a novel silver phosphate-based composite catalytic unit. Background technique [0002] In recent years, the increasingly serious environmental pollution and energy shortage have become two major global problems, which have attracted much attention in many fields. Semiconductor photocatalyst is recognized as one of the most promising technologies to solve the problems of energy shortage and environmental pollution, because it provides a simple and low-consumption method to effectively degrade target pollutants and utilize inexhaustible and pollution-free energy resources ( Sunlight) for continuous photocatalytic degradation. The low quantum yield and limited photoresponse area greatly limit the application of semiconductor photocatalysts. Silver phosphate (Ag 3 PO 4 ) can capture a large number of photons, have a very high quantum ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/18
Inventor 刘金库王凤蕊沈娟钟新华王建栋兰赏
Owner EAST CHINA UNIV OF SCI & TECH
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