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Copper doped niobium potassium compound oxide photocatalyst and preparation process

A composite oxide and photocatalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. The problems of harsh preparation conditions, etc., achieve the effects of good photocatalytic activity, wide calcination temperature range and low cost.

Inactive Publication Date: 2006-02-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the photocatalysts of the above inventions have better photocatalytic effects, almost all photocatalysts have complex or relatively complicated preparation processes and harsh preparation conditions, which have brought many difficulties to popularization and use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step (1) selects raw material Nb 2 o 5 , potassium carbonate, solid copper sulfate, of which Nb 2 o 5 The purity is above 99.5%;

[0038] Step (2) is that the mol ratio of niobium, copper and potassium is 4: 0.007: 2 (being Nb: K=2, Nb: Cu=571) ratio takes by weighing about 10 grams of raw material total amount, fully Grind and mix evenly;

[0039] Step (3) Put it in a porcelain crucible, place it at a temperature of 1000°C, calcinate in an air atmosphere for 2 hours, cool to room temperature, and grind;

[0040] The photocatalyst main phase that step (4) obtains is K 2 Cu 0.007 Nb 4 o 11.007 .

Embodiment 2

[0042] Step (1) selects raw material Nb 2 o 5 , potassium sulfate, solid copper sulfate, of which Nb 2 o 5 The purity is above 99.5%;

[0043] Step (2) is 4:0.021:2 (being Nb:K=2, Nb:Cu=190) ratio by the mol ratio of niobium, copper and potassium and takes by weighing about 10 grams of raw material total amount, fully Grind and mix evenly;

[0044] Step (3) Put it in a high-alumina crucible, place it at a temperature of 1000°C, calcinate in an air atmosphere for 2 hours, cool to room temperature, and grind;

[0045] The photocatalyst main phase that step (4) obtains is K 2 Cu 0.021 Nb 4 o 11.021 .

Embodiment 3

[0047] Step (1) selects raw material Nb 2 o 5 , potassium carbonate, solid copper sulfate, of which Nb 2 o 5 The purity is above 99.5%;

[0048] Step (2) is 4: 0.05: 2 (being Nb: K=2, Nb: Cu=80) ratio by the mol ratio of niobium, copper and potassium and takes by weighing about 10 grams of raw material total amount, fully in agate mortar Grind and mix evenly;

[0049] Step (3) Put it in a porcelain crucible, place it at a temperature of 900°C, calcinate it in an air atmosphere for 2 hours, cool it to room temperature, and grind it;

[0050] The photocatalyst main phase that step (4) obtains is K 2 Cu 0.05 Nb 4 o 11.05 .

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PUM

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Abstract

The invention relates to a copper- contained niobium potassium composite oxide photocatalyst and the method for preparation, the photocatalyst being the potassium niobium and copper composite oxide, the general formula being KxCuyNbzOw, among it, x= 1.8- 2, y=0.005- 0.2, z= 3.6- 4.2, and w= 11.51- 10.035. Comparing with the normal technique, the product and the preparation method have a merit as the following: 1. having a perfect photocatalysis activity without noble metal; 2. the condition in the process being flexible; 3. the technique simple, and the cost low.

Description

technical field [0001] The invention relates to a photocatalyst and a preparation method thereof, in particular to a photocatalyst composed of niobium potassium composite oxide and a preparation method thereof. Background technique [0002] The development of human life and the pollution of the environment by industrial production have also continued to intensify, which has led to the continuous decline in the quality of people's drinking water sources and industrial water sources, resulting in increasing air pollution, resulting in continuous destruction of the ecological environment, and posing a serious threat to human survival. . In order to solve these problems, people control and control environmental pollution through various methods. [0003] Photocatalytic oxidation technology can effectively destroy many structurally stable pollutants that are difficult to degrade biologically, and at the same time has the effect of sterilization and anti-mildew. In addition, its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847B01J23/20
Inventor 张高科邹曦欧阳世翕刘韩星
Owner WUHAN UNIV OF TECH
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