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Visible-light response photocatalyst Li3Nb3Bi2O12 and preparation method thereof

A li3nb3bi2o12 and photocatalyst technology, which is applied in the field of inorganic photocatalytic materials, can solve the problems of limited types of photocatalysts, low light conversion efficiency, poor stability, etc., and achieves the effects of excellent catalytic performance, simple preparation method and low cost.

Active Publication Date: 2014-06-25
SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD
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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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) 99.9% analytically pure chemical raw material Li 2 CO 3 , Nb 2 o 5 and Bi 2 o 3 , press Li 3 Nb 3 Bi 2 o 12 Chemical formula weighing ingredients.

[0020] (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.

[0021] (3) Pre-fire the uniformly mixed powder in step (2) at 700°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill to make the average diameter of the particles smaller than 2 μm, that is, Li 3 Nb 3 Bi 2 o 12 powder.

[0022] The prepared photocatalyst can remove 97.2% of methyl orange in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 2

[0024] (1) 99.9% analytically pure chemical raw material Li 2 CO 3 , Nb 2 o 5 and Bi 2 o 3 , press Li 3 Nb 3 Bi 2 o 12 Chemical formula weighing ingredients.

[0025] (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.

[0026] (3) Pre-fire the uniformly mixed powder in step (2) at 710°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill to make the average diameter of the particles smaller than 2 μm, that is, Li 3 Nb 3 Bi 2 o 12 powder.

[0027] The prepared photocatalyst can remove 98.0% of methyl orange in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 3

[0029] (1) 99.9% analytically pure chemical raw material Li 2 CO 3 , Nb 2 o 5 and Bi 2 o 3 , press Li 3 Nb 3 Bi 2 o 12 Chemical formula weighing ingredients.

[0030] (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.

[0031] (3) Pre-fire the uniformly mixed powder in step (2) at 720°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill to make the average particle diameter smaller than 2 μm, that is, Li 3 Nb 3 Bi 2 o 12 powder.

[0032]The prepared photocatalyst can remove 97.4% 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 visible-light response photocatalyst Li3Nb3Bi2O12 and a preparation method thereof. The chemical composition formula of the photocatalyst is Li3Nb3Bi2O12. 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 Li with visible light response 3 Nb 3 Bi 2 o 12 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 und...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20
Inventor 方亮蒋雪雯唐莹
Owner SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD
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