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Visible-light response niobate composite oxide photocatalyst KCuNb3O9 and preparation method thereof

A photocatalyst, niobate technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, niobium compound, etc. The effect of catalytic performance, simple preparation method and low cost

Inactive Publication Date: 2013-12-25
浦北高迈新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Our KCuNb 3 o 9 、KCuTa 3 o 9 , NaCuNb 3 o 9 and NaCuNb 3 o 9 etc. Niobium and tantalate conducted photocatalytic performance research, and found that KCuNb 3 o 9 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 K 2 CO 3 , CuO and Nb 2 o 5 , by KCuNb 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 1000°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then pulverize it with a ball mill to make the particle diameter smaller than 2 μm, and then you can get niobate KCuNb 3 o 9 powder.

[0021] The prepared photocatalyst can remove 97.8% 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 , CuO and Nb 2 o 5 , by KCuNb 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 1030°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 niobate KCuNb 3 o 9 powder.

[0026] The prepared photocatalyst can remove 98.2% 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 , CuO and Nb 2 o 5 , by KCuNb 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 1050°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then pulverize it with a ball mill to make the particle diameter smaller than 2 μm, and then you can get niobate KCuNb 3 o 9 powder.

[0031] The prepared photocatalyst, under the irradiation of visible light with a wavelength greater than 420nm, can remove 98% of methyl orange within 120 minutes.

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PUM

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Abstract

The invention discloses a visible-light response niobate composite oxide photocatalyst KCuNb3O9 and a preparation method thereof. A chemical composition formula of the niobate photocatalyst is KCuNb3O9. The invention further discloses the preparation method of the photocatalyst. The preparation method is simple and low in cost; and the prepared photocatalyst has excellent catalysis performance, has an effect of decomposing a harmful chemical substance under visible-light irradiation, is good in stability, and has a good application prospect.

Description

technical field [0001] The invention relates to a visible light responsive niobate composite oxide photocatalyst KCuNb 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 el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847C01G33/00
Inventor 苏聪学方亮邓婧
Owner 浦北高迈新能源科技有限公司