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Visible-light-responded photocatalyst Li4M5O17 and preparation method thereof

A technology of li4m5o17 and photocatalyst, which is applied in the field of inorganic photocatalytic materials, can solve the problems of limited photocatalyst types, poor stability, and low photoconversion efficiency, and 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 Li 2 CO 3 and MoO 3 , press Li 4 Mo 5 o 17 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 450°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, that is, Li 4 Mo 5 o 17 powder.

[0021] 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 2

[0023] 1) 99.9% analytically pure chemical raw material Li 2 CO 3 and WO 3 , press Li 4 W 5 o 17 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 460°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 Li tantalate 4 W 5 o 17 powder.

[0026] 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-responded photocatalyst Li4M5O17 and a preparation method thereof. The chemical composition formula of the photocatalyst is Li4M5O17, wherein M is either Mo or W. The invention further discloses the preparation method of the photocatalyst. According to the photocatalyst and the preparation method, the preparation method is simple and is low in cost, and the prepared photocatalyst has excellent catalysis performance, has a role in decomposition of 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 Li with visible light response 4 m 5 o 17 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 undergo ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01J23/30C01G39/02C01G41/02
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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