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Composite oxide photocatalyst Bi4 V(2-x) REx O(11-x) and preparation method thereof

A bi4v2-xrexo11-x, composite oxide technology, applied in the field of inorganic photocatalytic materials, can solve the problem of limited types of photocatalysts responding to visible light, and achieve excellent catalytic performance, low cost, and simple preparation methods

Inactive Publication Date: 2012-01-04
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the types of photocatalysts with visible light response reported are still very limited, so it is necessary to research and develop new high-efficiency photocatalysts with visible light response

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) 99.9% analytically pure chemical raw material Bi 2 o 3 , V 2 o 5 and La 2 o 3 , press Bi 4 V 1.6 La 0.4 o 10.6 Chemical formula weighing ingredients;

[0021] 2) Put the prepared raw materials into a ball mill tank, add zirconia balls and absolute ethanol, ball mill for 8 hours, mix and grind, take out and dry, and pass through a 200-mesh sieve;

[0022] 3) The above-mentioned homogeneously mixed powder is pre-fired at 950°C, kept for 4 hours, cooled to room temperature naturally, and then pulverized by a ball mill to reduce the particle diameter to about 2 μm, and the composite oxide photocatalyst Bi can be obtained. 4 V 1.6 La 0.4 o 10.6 powder.

[0023] The prepared photocatalyst has a methyl orange removal rate of 98.5% in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 2

[0025] 1) 99.9% analytically pure chemical raw material Bi 2 o 3 , V 2 o 5 and Sm 2 o 3 , press Bi 4 V 1.8 SM 0.2 o 10.8 Chemical formula weighing ingredients;

[0026] 2) Put the prepared raw materials into a ball mill tank, add zirconia balls and absolute ethanol, ball mill for 10 hours, mix and grind, take out and dry, and pass through a 200-mesh sieve;

[0027] 3) The above-mentioned homogeneously mixed powder is pre-fired at 900°C, kept for 6 hours, cooled to room temperature naturally, and then pulverized by a ball mill to reduce the particle diameter to about 2 μm, and the composite oxide Bi can be obtained 4 V 1.8 SM 0.2 o 10.8 Photocatalyst powder.

[0028] The prepared photocatalyst can remove 97% of methyl orange in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 3

[0030] 1) 99.9% analytically pure chemical raw material Bi 2 o 3 , V 2 o 5 and Pr 2 o 3 , press Bi 4 V 1.9 PR 0.1 o 10.9 Chemical formula weighing ingredients;

[0031] 2) Put the prepared raw materials into a ball mill tank, add zirconia balls and absolute ethanol, ball mill for 8 hours, mix and grind, take out and dry, and pass through a 200-mesh sieve;

[0032] 3) The above-mentioned homogeneously mixed powder is pre-fired at 850°C, and kept for 8 hours, cooled to room temperature naturally, and then pulverized by a ball mill to reduce the particle diameter to about 2 μm, and the composite oxide Bi can be obtained. 4 V 1.9 PR 0.1 o 10.9 Photocatalyst powder.

[0033] The prepared photocatalyst has a methyl orange removal rate of 98% in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

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Abstract

The invention discloses a composite oxide photocatalyst Bi4 V(2-x) REx O(11-x) and a preparation method thereof. The chemical compound general formula of the composite oxide photocatalyst is Bi4 V(2-x) REx O(11-x), wherein RE is one of the rare earth elements such as La, Pr, Nd, Sm and Eu, and x is more than 0 and less than or equal to 0.4. The preparation method comprises: 99.9% of analytically pure chemical raw materials of Bi2O3, V2O5 and RE2O3 are weighed and mixed according to the chemical formula of the Bi4 V(2-x) REx O(11-x), wherein the RE is one of the rare earth elements such as La,Pr, Nd, Sm and Eu, and x is more than 0 and less than or equal to 0.4; the prepared raw material is put into a ball-milling jar and added with zirconia ball and absolute ethyl alcohol for ball-milling for 8-10h and fine grinding after being mixed; the obtained product is taken out, dried and filtered through 200-mesh sieve; after that, the evenly mixed powder is presintered at 850-950 DEG C whichis maintained for 4-8h, and then is naturally cooled to be the room temperature; the particle diameter is changed to be smaller by grinding and reaches about 2mu m; finally, the composite oxide photocatalyst Bi4 V(2-x) REx O(11-x) powder is obtained. The invention has simple preparation method, low cost and excellent catalytic performance of the prepared photocatalyst.

Description

technical field [0001] The invention relates to a composite oxide photocatalyst Bi with visible light response 4 V 2-x RE x o 11-x The invention and a preparation method thereof belong to the field of inorganic photocatalytic materials. Background technique [0002] Since the 20th century, the rapid economic growth has brought serious negative effects—global environmental problems. Environmental pollution is a matter of great concern to all countries in the world. It has led to the continuous decline in the quality of people's drinking water 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. A large number of studies have shown that almost all organic pollutants can be effectively photocatalytically degraded, decolorized, detoxified...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22A62D101/28
Inventor 方亮胡长征李纯纯刘洁群
Owner GUILIN UNIVERSITY OF TECHNOLOGY