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Compound oxide photocatalyst Bi4V(2-x)MxO(11-x/2) and preparation method thereof

A bi4v2-xmxo11-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, achieve excellent catalytic performance, simple preparation method, and low cost

Inactive Publication Date: 2011-09-21
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 TiO 2 , press Bi 4 V 1.9 Ti 0.1 o 10.95 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 800°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 photocatalyst Bi can be obtained. 4 V 1.9 Ti 0.1 o 10.95 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 SnO 2 , press Bi 4 V 1.6 sn 0.4 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 870°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 photocatalyst Bi can be obtained. 4 V 1.6 sn 0.4 o 10.8 powder.

[0028] 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.

Embodiment 3

[0030] 1) 99.9% analytically pure chemical raw material Bi 2 o 3 , V 2 o 5 and TiO 2 , press Bi 4 V 1.3 Ti 0.7 o 10.65 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 930°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 1.3 Ti 0.7 o 10.65 powder.

[0033] The prepared photocatalyst can remove 98.6% of methyl orange in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

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Abstract

The invention discloses a compound oxide photocatalyst Bi4V(2-x)MxO(11-x / 2) and a preparation method thereof. The chemical formula of the compound oxide photocatalyst is Bi4V(2-x)MxO(11-x / 2), wherein M is one of Ti, Sn and Zr, and x is more than 0 and less than or equal to 0.8. The method comprises the following steps: weighing and preparing the chemical materials Bi2O3, V2O5 and MO2 with analytical purity of 99.9 percent by the chemical formula Bi4V(2-x)MxO(11-x / 2), wherein M is one of Ti, Sn and Zr, x is more than 0 and less than or equal to 0.8; placing the confected materials into a millpot, adding zirconia ball and absolute ethyl alcohol, ball-milling for 8-10 h, mixing and levigating, taking out, drying, sieving by a 200 mu sieve; presintering the evenly-mixed powder at a temperature of 800-950 DEG C and preserving heat for 4-8 h, cooling naturally to be a room temperature, micrifying the particle diameter to be about 2 um by ball milling to obtain the compound oxide photocatalyst Bi4V(2-x)MxO(11-x / 2) powder. The invention is featured by simple preparation method and low cost; and the prepared photocatalyst has excellent catalysis performance.

Description

technical field [0001] The invention relates to a bismuth-based composite oxide photocatalyst Bi that responds to visible light 4 V 2-x m x o 11-x / 2 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, decol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/14B01J21/06A62D3/10A62D101/28B01J23/18B01J37/04B01J37/08B01J23/22
Inventor 方亮胡长征李纯纯刘洁群苏和平
Owner GUILIN UNIVERSITY OF TECHNOLOGY