Visible-light-responsive photocatalyst LiVP2O8 and preparation method thereof

A photocatalyst and visible light technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of limited types of photocatalysts, narrow corresponding range of spectra, low light conversion efficiency, etc. Low, wide spectral response range, high light conversion efficiency effect

Active Publication Date: 2014-08-27
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 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, so 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

[0019] (1) 99.9% analytically pure chemical raw material Li 2 CO 3 , V 2 o 5 and NH 4 h 2 PO 4 The original powder by LiVP 2 o 8 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 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 diameter of the particles smaller than 2 μm to obtain LiVP 2 o 8 powder.

[0022] The prepared photocatalyst can remove 97.0% 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 , V 2 o 5 and NH 4 h 2 PO 4 The original powder by LiVP 2 o 8 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 740°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 to obtain LiVP 2 o 8 powder.

[0027] The prepared photocatalyst can remove 98.3% 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 , V 2 o 5 and NH 4 h 2 PO 4 The original powder by LiVP 2 o 8 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 750°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 to obtain LiVP 2 o 8 powder.

[0032] The prepared photocatalyst can remove 97.8% of methyl orange in 120 minutes under the irradiation of visible light with wavelength greater than 420nm.

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Abstract

The invention discloses a visible-light-responsive photocatalyst LiVP2O8 and a preparation method thereof. The photocatalyst has the chemical composition formula of LiVP2O8. The invention also discloses the preparation method of the material. The preparation method is simple and is low in cost, and the prepared photocatalyst has good catalytic performance, has a role in decomposition of harmful chemical substances under visible light irradiation, is good in stability, and has good application prospects.

Description

technical field [0001] The invention relates to a photocatalyst LiVP responsive to visible light 2 o 8 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 oxidat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/198
Inventor 蒋雪雯方亮唐莹
Owner SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD
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