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Visible-light-responded photocatalyst BaZn2Ti4O11 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: 2015-04-15
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.
Existing literature [R.S. Roth, C.J. Rawn, C.G. Lindsay, J. Solid Chem. 104 (1993) 99–118.], [A.G. Belous, O.V. Ovchar, M.K. Marjeta, M. Valant, J. Eur. Ceram. Soc. 26 (2006)3733–3739] reported the titanate BaZn 2 Ti 4 o 11 The synthesis, structure and microwave dielectric properties of these compounds, but there is no research report on the photocatalytic properties of this type of compounds. Our research on BaZn 2 Ti 4 o 11 , SrZn 2 Ti 4 o 11 , BaMg 2 Ti 4 o 11 and BaCo 2 Ti 4 o 11 conducted photocatalytic performance studies on titanates, and found that BaZn 2 Ti 4 o 11 Has excellent photocatalytic performance in response to visible light, but other components do not have photocatalytic performance in response to visible light

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 , ZnO and TiO 2 , press BaZn 2 Ti 4 o 11 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 to reduce the particle diameter to less than 2 μm, and then obtain titanate BaZn 2 Ti 4 o 11 powder.

[0021] The prepared photocatalyst can remove 97.5% 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 , ZnO and TiO 2 , press BaZn 2 Ti 4 o 11 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 1075°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 get titanate BaZn 2 Ti 4 o 11 powder.

[0026] The prepared photocatalyst can remove 98.5% 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 , ZnO and TiO 2 , press BaZn 2 Ti 4 o 11 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 1100°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 obtain titanate BYZGR 2 Ti 4 o 11 powder.

[0031] 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.

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Abstract

The invention discloses a visible-light-responded photocatalyst BaZn2Ti4O11 and a preparation method thereof. The chemical composition formula of the photocatalyst is BaZn2Ti4O11. 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 invention relates to a photocatalyst BaZn responsive to visible light 2 Ti 4 o 11 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...

Claims

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Application Information

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IPC IPC(8): B01J23/06
Inventor 唐莹方亮韦珍海
Owner 安徽上阡科技信息咨询有限公司
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