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Micronano-structured and silver phosphate based composite visible light catalytic material and preparing method thereof

A catalytic material, silver phosphate-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of accelerating the separation of photogenerated electron pairs, small size, etc., and achieve energy saving and environmental protection performance, high light Effects of Energy Utilization and Wide Visible Light Response Range

Inactive Publication Date: 2014-01-01
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Graphene-based materials are new materials with a single-layer sheet structure composed of carbon atoms. The thickness of a single-layer carbon source not only makes it suitable for the growth of functional nanomaterials, but is also recognized as an ideal carrier material for catalysts. The surface of graphene oxide materials With abundant oxygen-containing functional groups, using graphene oxide as a precursor is a good way to prepare composite photocatalytic materials. Using graphene oxide as a precursor material, silver ions are adsorbed to graphene oxide by electrostatic driving force surface, and then by controlling the nucleation and growth of silver phosphate, the final composite photocatalytic material has a uniform morphology and a small size. In addition, the good dispersion solubility and high specific surface area of ​​graphene oxide make the prepared The composite photocatalytic material has good dispersibility and adsorption in the solution, and its better micro-nano composite structure can further accelerate the separation of photogenerated electron pairs, prolong the life of the active components, and enhance the performance of the composite photocatalytic material. Catalytic activity. At present, using commercial zinc oxide, graphene oxide, silver nitrate and phosphate as raw materials, a graphene oxide / silver phosphate / zinc oxide composite photocatalytic material with a heterojunction structure is synthesized by ion exchange in aqueous solution and used No report on photocatalytic degradation of organic pollutants and water purification

Method used

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  • Micronano-structured and silver phosphate based composite visible light catalytic material and preparing method thereof
  • Micronano-structured and silver phosphate based composite visible light catalytic material and preparing method thereof
  • Micronano-structured and silver phosphate based composite visible light catalytic material and preparing method thereof

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Effect test

Embodiment 1

[0026] Disperse 10 mg of graphene oxide in 50 ml of deionized water and sonicate for 5 hours to obtain a graphene oxide dispersion, weigh 1.529 g of silver nitrate and 200 mg of ZnO and dissolve them in 50 ml of deionized water for 30 minutes to obtain a mixed precursor solution A, Add the mixed precursor solution A dropwise to the above graphene oxide dispersion under magnetic stirring, and continue to stir at a speed of 100 rpm at room temperature for 6 hours to obtain the mixed precursor solution B; weigh 0.426 g Na 2 HPO 4 The solid was dissolved in 20 ml of deionized water to obtain a disodium hydrogen phosphate solution, and the prepared disodium hydrogen phosphate solution was added dropwise to the mixed precursor solution B under agitation until gray-green turbidity appeared in the reaction system, and the addition was completed The resulting mixed solution was continuously stirred at a speed of 200 rpm for 30 min, and the obtained product was filtered with suction, wa...

Embodiment 2

[0028] Disperse 20 mg of graphene oxide in 50 ml of deionized water and sonicate for 5 hours to obtain a graphene oxide dispersion; weigh 1.529 g of silver nitrate and 300 mg of ZnO in 50 ml of deionized water and sonicate for 30 min to obtain a mixed precursor solution A; Add the mixed precursor solution A dropwise to the above graphene oxide dispersion under magnetic stirring, and continue to stir at a speed of 100 rpm at room temperature for 8 hours to obtain the mixed precursor solution B; weigh 0.426 g Na 2 HPO 4 The solid was dissolved in 20 ml of deionized water to obtain a disodium hydrogen phosphate solution, and the prepared disodium hydrogen phosphate solution was added dropwise to the mixed precursor solution B under agitation until gray-green turbidity appeared in the reaction system, and the addition was completed The resulting mixed solution was continuously stirred at a speed of 200 rpm for 40 min, and the obtained product was filtered with suction, washed with...

Embodiment 3

[0030] Disperse 50 mg of graphene oxide in 50 ml of deionized water and sonicate for 5 hours to obtain a graphene oxide dispersion, weigh 1.529 g of silver nitrate and 400 mg of ZnO and dissolve them in 50 ml of deionized water for 30 minutes to obtain a mixed precursor solution A, Add the mixed precursor solution A dropwise to the above graphene oxide dispersion under magnetic stirring, and continue to stir at a speed of 100 rpm at room temperature for 10 hours to obtain the mixed precursor solution B; weigh 0.426 g Na 2 HPO 4 The solid was dissolved in 20 ml of deionized water to obtain a disodium hydrogen phosphate solution, and the prepared disodium hydrogen phosphate solution was added dropwise to the mixed precursor solution B under stirring conditions until gray-green turbidity appeared in the reaction system, and the addition was completed The resulting mixed solution was continuously stirred at a speed of 200 rpm for 50 min, and the obtained product was filtered with ...

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Abstract

The invention relates to the technical field of photocatalysis, particularly to a micronano-structured and silver phosphate based composite visible light catalytic material and a preparing method thereof. The method includes the following steps: dissolving oxidized graphene in water, and performing ultrasonic treatment to obtain an oxidized graphene dispersion liquid; ultrasonically dispersing silver nitrate and zinc oxide in deionized water to obtain a mixed solution, stirring and dropwise adding the solution into the oxidized graphene dispersion liquid, so as to obtain a mixed precursor; slowly and dropwise adding a prepared phosphate solution in the mixed precursor of the oxidized graphene, the silver nitrate and the zinc oxide, and continuously stirring, performing suction filtration on the product, then repeatedly washing the product by the deionized water and absolute ethyl alcohol, and obtaining a composite after vacuum drying. The invention has the advantages that the preparing technology is simple, the required raw materials are abundant, the performance of the product is superior, and motivated by visible light, the catalytic material has stronger degradation activity to organic dyestuff rhodamine B.

Description

technical field [0001] The invention relates to the field of photocatalysis technology, in particular to a micro-nano structured silver phosphate-based composite visible light catalytic material and its preparation method, specifically to a graphene oxide / silver phosphate / zinc oxide composite visible light catalytic material prepared by an ion exchange method in an aqueous solution The method of materials belongs to the field of composite materials, photocatalytic technology and water pollution control. Background technique [0002] Zinc oxide is a semiconductor material with unique photoelectric properties. It has the advantages of high activity, no pollution, large reserves, and low price, making it widely concerned in the field of photocatalysis. However, due to the large band gap of zinc oxide (3.7 eV), only It can use about 4% of the entire visible spectrum to stimulate the generation of electron-hole pairs; and its energy band structure is easy to recombine the genera...

Claims

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Application Information

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IPC IPC(8): B01J27/18C02F1/30
Inventor 杨小飞秦洁玲李扬李荣唐华
Owner JIANGSU UNIV
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