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Visible-light-responded photocatalyst Ba3MoTiO8 and preparation method thereof

A photocatalyst and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve poor stability, low photoconversion efficiency, and no visible light response Photocatalytic performance and other issues, to achieve the effect of low cost, simple preparation method and excellent catalytic performance

Active Publication Date: 2013-09-25
东台城东科技创业园管理有限公司
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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.
It has been reported in the literature that the perovskite-like structure compound Ba 3 MoO 8 The synthesis and crystal structure of the compound, but there is no research report on the photocatalytic performance of this type of compound. 3 MoO 8 and Sr 3 MoO 8 A photocatalytic performance study was carried out and it was found that Ba 3 MoO 8 photocatalytic performance with excellent visible light response, but the Sr 3 MoO 8 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 BaCO 3 、MoO 3 and TiO 2 , press Ba 3 MoO 8 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 800°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill to reduce the particle diameter to less than 2 μm to obtain Ba molybdate 3 MoO 8 powder.

[0021] 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 2

[0023] (1) 99.9% analytically pure chemical raw material BaCO 3 、MoO 3 and TiO 2 , press Ba 3 MoO 8 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 810°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, and then you can get Ba molybdate 3 MoO 8 powder.

[0026] The prepared photocatalyst can remove 98.6% 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 BaCO 3 、MoO 3 and TiO 2 , press Ba 3 MoO 8 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 820°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, and then you can get Ba molybdate 3 MoO 8 powder.

[0031] The prepared photocatalyst can remove 99.2% 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 molybdate photocatalyst Ba3MoTiO8 and a preparation method thereof. The chemical composition formula of the molybdate photocatalyst is Ba3MoTiO8. The invention further discloses the preparation method of the photocatalyst. According to the photocatalyst and the preparation method thereof, 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 present invention relates to a kind of photocatalyst Ba of visible light response 3 MoO 8 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 ...

Claims

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Application Information

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IPC IPC(8): B01J23/28
Inventor 方亮唐莹韦珍海
Owner 东台城东科技创业园管理有限公司
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