Visible light responded photocatalyst LiBGe3O8 and preparation method thereof

A photocatalyst, visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of limited types of photocatalysts, low light conversion efficiency, difficult synthesis, etc., and achieve visible light response frequency. The effect of wide range, high light conversion efficiency and simple preparation method

Inactive Publication Date: 2016-10-12
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, niobate photocatalyst Pb 3 Nb 4 o 13 、BiNbO 4 and Bi 2 MbO 7 (M=Al, Ga, In, Y, rare earth elements and Fe) etc. and niobium potassium composite oxide photocatalysts such as KNbO 3 , KNb 3 o 8 、K 4 Nb 6 o 17 and K 6 Nb 10.6 o 30 have good photocatalytic performance, but their intrinsic photocatalytic effect is weak or inactive in the visible light range.
[0005] Although photocatalysis research has been carried out for several years, most of the exploration and development of visible light-responsive photocatalysts are based on experience summaries obtained through a large number of exp

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) The analytically pure chemical raw material Li 2 CO 3 , B 2 o 3 and GeO 2 powder of LiBGe 3 o 8 The composition weighs the 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, take out and dry, and pass through a 200-mesh sieve.

[0020] (3) Pre-fire the uniformly mixed powder in step (2) at 950°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 average particle diameter smaller than 2 μm, and then LiBGe is obtained 3 o 8 powder.

[0021] The prepared photocatalyst has a methyl orange removal rate of 97.7% in 60 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 2

[0023] (1) The analytically pure chemical raw material Li 2 CO 3 , B 2 o 3 and GeO 2 powder of LiBGe 3 o 8 The composition weighs the 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, take out and dry, and pass through a 200-mesh sieve.

[0025] (3) Pre-fire the uniformly mixed powder in step (2) at 980°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then pulverize it through a ball mill to make the average particle diameter smaller than 2 μm, and then LiBGe is obtained 3 o 8 powder.

[0026] The prepared photocatalyst has a methyl orange removal rate of 98.9% in 60 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 3

[0028] (1) The analytically pure chemical raw material Li 2 CO 3 , B 2 o 3 and GeO 2 powder of LiBGe 3 o 8 The composition weighs the 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, take out and dry, and pass through a 200-mesh sieve.

[0030] (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 average particle diameter smaller than 2 μm, and then LiBGe is obtained 3 o 8 powder.

[0031] The prepared photocatalyst has a methyl orange removal rate of 98.5% in 60 minutes under the irradiation of visible light with a wavelength greater than 420nm.

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Abstract

The invention discloses a broadband and efficient visible light responded photocatalyst LiBGe3O8 and a preparation method thereof. The chemical formula of the photocatalyst is LiBGe3O8. The invention further discloses the preparation method of the material. The obtained photocatalyst has the advantages of wide spectral response range, high light conversion efficiency and good stability and the like. The photocatalyst has the effects of decomposing harmful chemical substances and chemical organic matters and sterilizing under the irradiation of visible light; and furthermore, the preparation method is simple, low in synthesis temperature, low in cost and suitable for industrial production and application.

Description

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Claims

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Application Information

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Owner GUILIN UNIVERSITY OF TECHNOLOGY
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