Metal/metal oxide/g-C3N4 composite photocatalytic material and preparation method thereof

A composite photocatalysis, g-c3n4 technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low photocatalytic efficiency, hindering development and application, poor electrical conductivity, etc. Enhanced photocatalytic activity, low synthesis cost, and convenient operation

Inactive Publication Date: 2015-09-09
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a single g-C 3 N 4 The fast recombination of photogenerated electrons and holes, and the poor conductivity

Method used

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  • Metal/metal oxide/g-C3N4 composite photocatalytic material and preparation method thereof
  • Metal/metal oxide/g-C3N4 composite photocatalytic material and preparation method thereof
  • Metal/metal oxide/g-C3N4 composite photocatalytic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take a certain amount of melamine powder and put it in an alumina crucible, cover it and place it in a muffle furnace, heat it to 550°C at a rate of 5°C per minute and keep it at this temperature for 2 hours. When the temperature dropped to room temperature, the obtained light yellow solid was ground into a fine powder which is g-C 3 N 4 . Take 0.1 gram of g-C prepared above 3 N 4The powder was dispersed in a mixed solution of 20 ml of methanol and 60 ml of deionized water by sonication and a certain amount of polyvinylpyrrolidone dispersant was added (in terms of molar ratio, polyvinylpyrrolidone: metal precursor = 10: 1), and stirred under magnetic force Add 0.062 ml of chloroplatinic acid solution (50 mM) and 0.041 ml of chloroauric acid solution (50 mM), the molar ratio of gold and platinum is 4:6, and sonicate for 10 minutes to obtain a uniformly dispersed suspension. The suspension was placed under a 350W xenon lamp for 1 hour of light, and stirring was contin...

Embodiment 2

[0035] Take a certain amount of melamine powder and put it in an alumina crucible, cover it and place it in a muffle furnace, heat it to 550°C at a rate of 5°C per minute and keep it at this temperature for 2 hours. When the temperature dropped to room temperature, the obtained light yellow solid was ground into a fine powder which is g-C 3 N 4 . Take 0.1 gram of g-C prepared above 3 N 4 The powder was dispersed in a mixed solution of 40 ml of methanol and 40 ml of deionized water by sonication and a certain amount of polyvinylpyrrolidone dispersant was added (in terms of molar ratio, polyvinylpyrrolidone: metal precursor = 10: 1), and stirred under magnetic force Add 0.051 ml of chloroplatinic acid solution (50 mM) and 0.051 ml of chloroauric acid solution (50 mM), the molar ratio of gold and platinum is 5:5, and sonicate for 10 minutes to obtain a uniformly dispersed suspension. The suspension was placed under a 350W xenon lamp for 1 hour of light, and stirring was conti...

Embodiment 3

[0037] Take a certain amount of melamine powder and put it in an alumina crucible, cover it and place it in a muffle furnace, heat it to 550°C at a rate of 5°C per minute and keep it at this temperature for 2 hours. When the temperature dropped to room temperature, the obtained light yellow solid was ground into a fine powder which is g-C 3 N 4 . Take 0.1 gram of g-C prepared above 3 N 4 The powder was dispersed in a mixed solution of 35 ml of methanol and 45 ml of deionized water by sonication and a certain amount of polyethylene glycol dispersant was added (by molar ratio, polyethylene glycol: metal precursor = 10: 1). Add 0.041 ml of chloroplatinic acid solution (50 mM) and 0.061 ml of chloroauric acid solution (50 mM) under magnetic stirring, the molar ratio of gold and platinum is 6:4, and sonicate for 10 minutes to obtain a uniformly dispersed suspension. The suspension was placed under a 350W xenon lamp for 1 hour of light, and stirring was continued during the ligh...

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Abstract

Belonging to the field of material preparation and energy environment, the invention provides a metal/metal oxide/g-C3N4 composite photocatalytic material and a preparation method thereof. The metal/metal oxide/g-C3N4 composite photocatalytic material is characterized in that: it is formed by lamellar g-C3N4 and first metal particles and second metal's oxide nanoparticles deposited on the lamellar g-C3N4 surface. In the composite photocatalytic material, the mole percentage of the first metal and the second metal's oxide is adjustable in the range of 1:10-10:1. The composite photocatalytic material provided by the invention has strong surface plasma effect and good catalysis ability, and high visible light photocatalytic activity. The method has the characteristics of simple preparation process, easy control, and low synthesis cost.

Description

technical field [0001] The present invention relates to a metal / metal oxide / g-C 3 N 4 A composite photocatalytic material and a preparation method thereof belong to the fields of material preparation and energy environment. Background technique [0002] With the improvement of people's living standards, energy shortage and environmental pollution will be two serious problems facing mankind. Many semiconductor photocatalysts such as g-C 3 N 4 , TiO 2 , CdS, ZnO, etc. have received extensive attention because of their ability to convert solar energy into clean chemical fuels at room temperature, or to use solar energy to degrade pollutants. Among them, graphitic carbon nitride (g-C 3 N 4 ) This new type of organic semiconductor photocatalyst has become a research hotspot in the field of energy and environment in recent years because of its outstanding advantages such as non-toxic, cheap and easy to obtain, simple preparation method, good stability, and visible light res...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04
CPCY02E60/36
Inventor 余家国曹少文江静
Owner WUHAN UNIV OF TECH
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