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Preparation method of high-catalytic efficiency and recyclable photocatalyst

A catalytic efficiency, photocatalyst technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low catalytic efficiency of photocatalysts, difficulty in recycling and reuse and other issues, to achieve the effect of easy recycling and reuse, improvement of utilization efficiency, and convenient recycling

Inactive Publication Date: 2012-10-17
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing photocatalyst has low catalytic efficiency and is difficult to recycle and reuse, the present invention provides a method for preparing a recyclable photocatalyst with high catalytic efficiency

Method used

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  • Preparation method of high-catalytic efficiency and recyclable photocatalyst
  • Preparation method of high-catalytic efficiency and recyclable photocatalyst

Examples

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Effect test

Embodiment 1

[0020] A method for preparing a recyclable photocatalyst with high catalytic efficiency, comprising the steps of:

[0021] (1) put x Carbonaceous particles with a gram size of less than 10nm or graphene with a thickness of less than 10 carbon atoms are refluxed in 0.5mol / L nitric acid for 3 hours to obtain a carbon nanoparticle suspension v liter; add y grams of sodium alginate to the carbon nanoparticle suspension and stir vigorously to obtain a mixed solution; where: x: v = 1:5, v:y = 1:4;

[0022] (2) Pour a liter of the above mixed solution into the container so that the height of the liquid level is 4 mm, and evenly spray b liter of 5 mol / L copper chloride or copper sulfate solution on the surface of the mixed solution; the seaweed in the mixed solution When acid radical ions encounter divalent copper ions, they will produce gel and shrink to form through holes along the permeation path of divalent copper ions. After 2 hours of reaction, a copper alginate gel with a th...

Embodiment 2

[0025] A method for preparing a recyclable photocatalyst with high catalytic efficiency, comprising the steps of:

[0026] (1) put x Carbonaceous particles with a gram size of less than 25nm or graphene with a thickness of less than 10 carbon atoms are refluxed in 2.8mol / L nitric acid for 5 hours to obtain a carbon nanoparticle suspension v liter; add y grams of sodium alginate to the carbon nanoparticle suspension and stir vigorously to obtain a mixed solution; where: x: v = 1:0.1, v:y = 1:27;

[0027] (2) Pour a liter of the above mixed solution into the container and make the liquid level 12mm, and evenly spray b liter of 2.6 mol / L copper chloride or copper sulfate solution on the surface of the mixed solution; the alginate in the mixed solution When the ions encounter divalent copper ions, they will produce gel and shrink to form through holes along the permeation path of divalent copper ions. After 3 hours of reaction, a copper alginate gel with a through hole structur...

Embodiment 3

[0030] A method for preparing a recyclable photocatalyst with high catalytic efficiency, comprising the steps of:

[0031] (1) put x Carbonaceous particles with a gram size of less than 15 nm or graphene with a thickness of less than 10 carbon atoms are refluxed in 1.5 mol / L nitric acid for 7 hours to obtain a carbon nanoparticle suspension vliter; add y grams of sodium alginate to the carbon nanoparticle suspension and stir vigorously to obtain a mixed solution; where: x: v = 1:2.5, v:y = 1: 50;

[0032] (2) Pour a liter of the above mixed solution into the container so that the height of the liquid level is 8 mm, and evenly spray b liter of 4 mol / L copper chloride or copper sulfate solution on the surface of the mixed solution; the seaweed in the mixed solution When acid radical ions encounter divalent copper ions, they will produce gel and shrink to form through holes along the permeation path of divalent copper ions. After 4 hours of reaction, a copper alginate gel with...

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Abstract

The invention relates to a preparation method of a photocatalyst, in particular to a preparation method of a high-catalytic efficiency and recyclable photocatalyst, aiming at solving the problem that the existing catalyst is difficult to recycle. The preparation method of the high-catalytic efficiency and recyclable photocatalyst comprises the following steps of: adding sodium alginate into carbon nano-particle suspending liquid, and drastically stirring to obtain mixed liquid; evenly spraying copper chloride or acid copper solution on the surface of the mixed liquid and reacting to form copper alginate gel with a through hole structure; soaking the copper alginate gel in sodium hydroxide or potassium hydroxide solution and re-spraying hydroxylamine hydrochloride solution or sodium borohydride solution to obtain a composite structure that the surfaces of the carbon nano-particles are modified by cuprous oxide nanocrystalline grafted onto the inner wall of the through hole structure, namely the photocatalyst. The photocatalyst prepared by the method is recyclable, is convenient to recover, and can be widely used for converting the solar energy into the chemical energy, degrading orconverting the harmful substances in the environment, preparing the hydrogen energy, etc.

Description

technical field [0001] The invention relates to a preparation method of a photocatalyst, in particular to a preparation method of a recyclable photocatalyst with high catalytic efficiency. Background technique [0002] With the advent of the energy and environmental crisis, using photocatalysts to convert solar energy into chemical energy, degrade or convert harmful substances in the environment, and produce hydrogen energy is an important way to achieve sustainable development of human society. However, two key issues that limit the widespread application of photocatalysts are: photocatalytic efficiency and recyclability. [0003] The main factor that determines the high efficiency of photocatalytic materials is the band gap structure of the material itself, which determines the material's ability to capture photons, the formation of electron-hole pairs, and its redox ability. With the most common photocatalyst TiO 2 For example, its band gap is 3.2 eV, which can only abs...

Claims

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Application Information

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IPC IPC(8): B01J31/28B01J35/10
Inventor 胡胜亮杨金龙董英鸽刘炜王延忠常青
Owner ZHONGBEI UNIV
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