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Visible-light response photocatalyst Sr2Bi3V3O14 and preparation method thereof

A sr2bi3v3o14, photocatalyst technology, applied in the field of inorganic photocatalytic materials, can solve the problems of low photoconversion efficiency, no photocatalytic performance with visible light response, poor stability, etc., and achieve the effect of simple preparation method, excellent catalytic performance and low cost

Inactive Publication Date: 2014-01-08
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]Although photocatalytic research has been carried out for several years, the types of photocatalysts with visible light response reported are still very limited, and there are still low photoconversion efficiency and poor stability. Therefore, it is necessary to research and develop new high-efficiency photocatalysts with visible light response.
Bismuth salt Sr 2 Bi 3 V 3 o 14 The synthesis and crystal structure of the compound, but there is no research report on the photocatalytic performance of this type of compound. Our research on Sr 2 Bi 3 V 3 o 14 、Ba 2 Bi 3 V 3 o 14 and Ca 2 Bi 3 V 3 o 14 and other bismuth salts have carried out photocatalytic performance research, and found that Sr 2 Bi 3 V 3 o 14 photocatalytic performance with excellent visible light response, but Ba 2 Bi 3 V 3 o 14 , Ca 2 Bi 3 V 3 o 14 Photocatalytic performance without visible light response

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) 99.9% analytically pure chemical raw material SrCO 3 、 Bi 2 o 3 and V 2 o 5 , press Sr 2 Bi 3 V 3 o 14 Chemical formula weighing ingredients.

[0019] (2) Mix the raw materials prepared in step (1), put them into a ball mill jar, add zirconia balls and absolute ethanol, ball mill for 8 hours, mix and grind until fine, take it out and dry it, and pass through a 200-mesh sieve.

[0020] (3) Pre-fire the uniformly mixed powder in step (2) at 770°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill to make the particle diameter smaller than 2 μm, that is, bismuth salt Sr 2 Bi 3 V 3 o 14 powder.

[0021] The prepared photocatalyst can remove 98.5% of methyl orange in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 2

[0023] (1) 99.9% analytically pure chemical raw material SrCO 3 、 Bi 2 o 3 and V 2 o 5 , press Sr 2 Bi 3 V 3 o 14 Chemical formula weighing ingredients.

[0024] (2) Mix the raw materials prepared in step (1), put them into a ball mill jar, add zirconia balls and absolute ethanol, ball mill for 8 hours, mix and grind until fine, take it out and dry it, and pass through a 200-mesh sieve.

[0025] (3) Pre-fire the uniformly mixed powder in step (2) at 790°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then pulverize it with a ball mill to make the particle diameter smaller than 2 μm, to obtain bismuth salt Sr 2 Bi 3 V 3 o 14 powder.

[0026] The prepared photocatalyst, under the irradiation of visible light with a wavelength greater than 420nm, can remove 99.1% of methyl orange within 120 minutes.

Embodiment 3

[0028] (1) 99.9% analytically pure chemical raw material SrCO 3 、 Bi 2 o 3 and V 2o 5 , press Sr 2 Bi 3 V 3 o 14 Chemical formula weighing ingredients.

[0029] (2) Mix the raw materials prepared in step (1), put them into a ball mill jar, add zirconia balls and absolute ethanol, ball mill for 8 hours, mix and grind until fine, take it out and dry it, and pass through a 200-mesh sieve.

[0030] (3) Pre-fire the uniformly mixed powder in step (2) at 800°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then pulverize it with a ball mill to make the particle diameter smaller than 2 μm to obtain bismuth salt Sr 2 Bi 3 V 3 o 14 powder.

[0031] The prepared photocatalyst can remove 98.8% of methyl orange in 120 minutes under the irradiation of visible light with wavelength greater than 420nm.

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Abstract

The invention discloses a visible-light response bismuthate photocatalyst Sr2Bi3V3O14 and a preparation method thereof. The chemical composition formula of the bismuthate photocatalyst is Sr2Bi3V3O14. The invention further discloses the preparation method of the photocatalyst. According to the photocatalyst and the preparation method of the photocatalyst, the preparation method is simple and is low in cost, and the prepared photocatalyst has excellent catalysis performance, plays a role in decomposing harmful chemical substances under the irradiation of visible light and is good in stability, thereby having good application prospects.

Description

technical field [0001] The invention relates to a photocatalyst Sr that responds to visible light 2 Bi 3 V 3 o 14 The invention and a preparation method thereof belong to the field of inorganic photocatalytic materials. Background technique [0002] With the development of society and economy, people pay more and more attention to energy and ecological environment. Solving the problems of energy shortage and environmental pollution is an urgent need to achieve sustainable development, improve people's quality of life and ensure national security. [0003] Since the late 1970s, people have proposed the use of photocatalysts to decompose organic substances such as pesticides and odorous substances in water and the atmosphere, and self-cleaning of solid surfaces coated with photocatalysts. The principle of photocatalytic reaction is that after the photocatalyst absorbs photons higher than its bandgap energy, holes and electrons are generated, and these holes and electrons u...

Claims

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Application Information

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IPC IPC(8): B01J23/22
Inventor 苏聪学方亮巩美露
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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