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Photocatalyst Ba25Cu18Zn4O47 with visible light response and preparation method thereof

A ba25cu18zn4o47, photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of poor stability, low light conversion efficiency, and limited types of photocatalysts and other problems, to achieve the effect of low cost, simple preparation method and excellent catalytic performance

Active Publication Date: 2014-01-22
安徽上阡科技信息咨询有限公司
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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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) The 99.9% analytically pure chemical raw material BaCO 3 , CuO and ZnO, according to Ba 25 Cu 18 Zn 4 O 47 Chemical formula weighing ingredients.

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

[0020] (3) Pre-fire the uniformly mixed powder in step (2) at 900°C, keep the temperature for 6 hours, cool down to room temperature naturally, and then reduce the particle diameter by means of ball mill pulverization to less than 2 μm, that is, to obtain Ba 25 Cu 18 Zn 4 O 47 powder.

[0021] The prepared photocatalyst can achieve a removal rate of 98.0% for methyl orange in 120 minutes under the irradiation of visible light with a wavelength greater than 420 nm.

Embodiment 2

[0023] (1) The 99.9% analytically pure chemical raw material BaCO 3 , CuO and ZnO, according to Ba 25 Cu 18 Zn 4 O 47 Chemical formula weighing ingredients.

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

[0025] (3) Pre-fire the uniformly mixed powder in step (2) at 920°C, keep the temperature for 6 hours, cool down to room temperature naturally, and then reduce the particle diameter by means of ball mill pulverization to less than 2 μm, that is, to obtain Ba 25 Cu 18 Zn 4 O 47 powder.

[0026] The prepared photocatalyst can achieve a removal rate of 98.7% for methyl orange in 120 minutes under the irradiation of visible light with a wavelength greater than 420 nm.

Embodiment 3

[0028] (1) The 99.9% analytically pure chemical raw material BaCO 3 , CuO and ZnO, according to Ba 25 Cu 18 Zn 4 O 47 Chemical formula weighing ingredients.

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

[0030] (3) Pre-fire the uniformly mixed powder in step (2) at 930°C, keep the temperature for 6 hours, cool down to room temperature naturally, and then reduce the particle diameter by means of ball mill pulverization to less than 2 μm, that is, to obtain Ba 25 Cu 18 Zn 4 O 47 powder.

[0031] The prepared photocatalyst can remove 98.2% of methyl orange in 120 min under the irradiation of visible light with a wavelength greater than 420 nm.

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Abstract

The invention discloses a photocatalyst Ba25Cu18Zn4O47 with visible light response and a preparation method thereof. The chemical composition formula of the photocatalyst is Ba25Cu18Zn4O47. The invention also discloses the preparation method of the material. The preparation method is simple and is low in cost. The prepared photocatalyst has excellent catalytic performance, has the function of decomposing harmful chemical substances when irradiated by visible light and has good stability and good application prospect.

Description

technical field [0001] The invention relates to a visible light-responsive photocatalyst Ba 25 Cu 18 Zn 4 O 47 The invention and the preparation method thereof belong to the field of inorganic photocatalytic materials. Background technique [0002] With the development of social 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, the use of photocatalysts to decompose organic substances such as pesticides and malodorous substances in water and the atmosphere, and the self-cleaning of photocatalyst-coated solid surfaces have been proposed. The principle of the photocatalytic reaction is that the photocatalyst generates holes and electrons after absorbing photons with energy higher than its band gap. These holes and electrons under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80
Inventor 方亮苏和平唐莹
Owner 安徽上阡科技信息咨询有限公司
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