Columbate photocatalyst Ba8MNb6O24 and preparation method thereof

A technology of ba8mnb6o24 and photocatalyst, which is applied in the field of inorganic photocatalytic materials, can solve the problems of poor stability, limited types of photocatalysts, and low light conversion efficiency, and achieve the effects of low cost, excellent catalytic performance, and simple preparation method

Inactive Publication Date: 2013-07-31
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although photocatalysis 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 problems such as low photoconversion efficiency, poor stability, and narrow spectral response range. Therefore, the research and development of new photocatalysts with Efficient photocatalysts responsive to visible light are highly desirable

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 , CoO and Nb 2 o 5 , press Ba 8 CoNb 6 o 24 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 1350°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill to pulverize the particle diameter to be smaller than 2 μm to obtain Ba niobate 8 CoNb 6 o 24 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 BaCO 3 , NiO and Nb 2 o 5 , press Ba 8 NiNb 6 o 24 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 1360°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 to obtain Ba niobate 8 NiNb 6 o 24 powder.

[0026] 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 3

[0028] (1) 99.9% analytically pure chemical raw material BaCO 3 , MgO and Nb 2 o 5 , press Ba 8 MgNb 6 o 24 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 1400°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 to obtain Ba niobate 8 MgNb 6 o 24 powder.

[0031] The prepared photocatalyst can remove 98.4% 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 columbate photocatalyst Ba8MNb6O24 and preparation method thereof. The general formula of chemical composition of the photocatalyst is Ba8MNb6O24, wherein, M one of the Co, Ni, Mg and Zn. The invention also discloses a preparation method of the material. The invention has the advantages of simple preparation method and low cost; and the prepared photocatalyst has excellent catalysis performance, and can decompose harmful chemical substances under irradiation of visible light, and has the advantages of good stability and good application prospect.

Description

technical field [0001] The invention relates to a visible light responsive niobate photocatalyst Ba 8 Nb 6 o 24 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] In 1972, Fujishima discovered TiO 2 Semiconductor electrodes can photolyze water under ultraviolet light irradiation, which has triggered an upsurge of research on semiconductor photocatalysis. Its main fields include: (1) Using sunlight as energy and oxygen in the air as oxidant to promote the complete decomposition of organic pollutants in water and air into CO 2 、H 2 O and other inorganic salts are an ideal pollutant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847B01J23/20
Inventor 方亮唐莹韦珍海
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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