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Visible-light-responsive tantalate photocatalyst LiMTa3O9 and preparation method thereof

A photocatalyst, tantalate 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, photocatalyst The problem of limited types, etc., achieves the effects of low cost, simple preparation method and excellent catalytic performance.

Active Publication Date: 2013-06-19
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 Li 2 CO 3 , MgO and Ta 2 o 5 , by LiMgTa 3 o 9 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 1050°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill or other pulverizing means to make the particle diameter smaller than 2 μm, and then you can get tantalate LiMgTa 3 o 9 powder.

[0021] The prepared photocatalyst can remove 97.9% 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 Li 2 CO 3 , CoO and Ta 2 o 5 , by LiCoTa 3 o 9 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 1020°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill or other pulverizing means to make the particle diameter smaller than 2 μm, and then you can get tantalate LiCoTa 3 o 9 powder.

[0026] The prepared photocatalyst can remove 98.1% 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 Li 2 CO 3 , ZnO and Ta 2 o 5 , press LiZnTa 3 o 9 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 1000°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill or other pulverizing means to make the particle diameter smaller than 2 μm, and then you can get tantalate LiZnTa 3 o 9 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 a visible-light-responsive tantalate photocatalyst LiMTa3O9 and a preparation method thereof. The general formula of the chemical composition of the tantalate photocatalyst is LiMTa3O9, wherein M is Mg, Zn or Co. The invention also discloses a preparation method of the material. The preparation method disclosed by the invention is simple and low in cost; and the prepared photocatalyst has the advantages of excellent catalytic property and high stability, has the function of decomposing harmful chemical substances under visible light irradiation, and thus, has favorable application prospects.

Description

technical field [0001] The invention relates to a visible light-responsive tantalate photocatalyst LiMTa 3 o 9 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 underg...

Claims

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Application Information

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IPC IPC(8): B01J23/20B01J23/847
Inventor 方亮邓婧唐莹
Owner 安徽上阡科技信息咨询有限公司
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