Layered composite oxide photocatalyst Sr2KM3O10 and preparation method thereof

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

Active Publication Date: 2013-07-10
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) 99.9% analytically pure chemical raw material K 2 CO 3 , SrCO 3 and Nb 2 o 5 , press Sr 2 kNb 3 o 10 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 1250°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then pulverize it by a ball mill to make the particle diameter smaller than 2 μm, that is, to obtain layered composite oxidation. Material Sr 2 kNb 3 o 10 powder.

[0021] The prepared photocatalyst can remove 98.3% 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 K 2 CO 3 , SrCO 3 and Ta 2 o 5 , press Sr 2 K Ta 3 o 10 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 1300°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill to pulverize the particle diameter to be smaller than 2 μm, that is, the layered composite oxidation is obtained. Material Sr 2 K Ta 3 o 10 powder.

[0026] The prepared photocatalyst can remove 98.9% of methyl orange in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 3

[0028] (1) 99.9% analytically pure chemical raw material K 2 CO 3 , SrCO 3 and V 2 o 5 , press Sr 2 KV 3 o 10 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 1200°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, the layered composite oxidation is obtained. Sr 2 KV 3 o 10 powder.

[0031] The prepared photocatalyst can remove 99.3% 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 an application of a layered composite oxide as visible light responsive photocatalyst. The chemical composition general formula of the layered composite oxide photocatalyst is Sr2KM3O10, wherein M is one of Nb, Ta and V. 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 under visible light irradiation and has good stability and good application prospect.

Description

technical field [0001] The invention relates to a layered composite oxide photocatalyst Sr that responds to visible light 2 KM 3 o 10 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] In 1972, Fujishima discovered TiO 2 Semiconductor electrodes have the effect of photolyzing water under ultraviolet light irradiation, which has triggered an upsurge of research on semiconductor photocatalysis. Its main fields include: (1) Using sunlight as energy and oxygen in the air as oxidant to promote the complete decomposition of organic pollutants in water and air into CO 2 、H 2 O and other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20B01J23/22C01G33/00C01G35/00C01G31/02
Inventor 方亮唐莹韦珍海
Owner 安徽上阡科技信息咨询有限公司
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