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Visible light-responsive photocatalyst life 2 v 3 o 11 and preparation method thereof

A life2v3o11, photocatalyst technology, applied in the field of inorganic photocatalytic materials, can solve the problems of not having visible light response photocatalytic performance, limited types of photocatalysts, narrow spectral response range, etc., achieving low cost, wide spectral response range, and stability Good results

Inactive Publication Date: 2016-09-28
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
The new compound LiFe synthesized in our study 2 V 3 o 11 、LiCr 2 V 3 o 11 , LiFe 2 Nb 3 o 11 A photocatalytic performance study was carried out, and it was found that LiFe 2 V 3 o 11 has excellent photocatalytic performance in response to visible light, while LiCr 2 V 3 o 11 , LiFe 2 Nb 3 o 11 Photocatalytic performance without visible light response

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) 99.9% analytically pure chemical raw material Li 2 CO 3 , Fe 2 o 3 and V 2 o 5 , by LiFe 2 V 3 o 11 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 distilled water, ball mill for 8 hours, mix and grind until fine, take it out and dry it, pass through a 200-mesh sieve.

[0020] (3) Pre-fire the uniformly mixed powder in step (2) at 650°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill to pulverize the average particle diameter to be smaller than 2 μm to obtain LiFe 2 V 3 o 11 powder.

[0021] The prepared photocatalyst can remove 97.6% of methyl orange in 60 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 2

[0023] (1) 99.9% analytically pure chemical raw material Li 2 CO 3 , Fe 2 o 3 and V 2 o 5 , by LiFe 2 V 3 o 11 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 distilled water, ball mill for 8 hours, mix and grind until fine, take it out and dry it, pass through a 200-mesh sieve.

[0025] (3) Pre-fire the uniformly mixed powder in step (2) at 680°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill to pulverize the average particle diameter to be smaller than 2μm to obtain LiFe 2 V 3 o 11 powder.

[0026] The prepared photocatalyst can remove 98.7% of methyl orange in 60 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 3

[0028] (1) 99.9% analytically pure chemical raw material Li 2 CO 3 , Fe 2 o 3 and V 2 o 5 , by LiFe 2 V 3 o 11 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 distilled water, ball mill for 8 hours, mix and grind until fine, take it out and dry it, pass through a 200-mesh sieve.

[0030] (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 pulverize the average particle diameter to be smaller than 2μm to obtain LiFe 2 V 3 o 11 powder.

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

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Abstract

The invention discloses a visible light responsive photocatalyst LiFe 2 V 3 o 11 and its preparation method. The chemical composition of the photocatalyst is LiFe 2 V 3 o 11 . The invention also discloses a preparation method of the above material. The photocatalyst obtained by the present invention has the advantages of wide spectral response range, high photoconversion efficiency and good stability, and has the effect of decomposing harmful chemical substances, organic biomass and sterilizing under visible light irradiation; in addition, the preparation method is simple, the synthesis temperature is low, and the cost is low. Low, suitable for industrial production and application.

Description

technical field [0001] The invention relates to a photocatalyst LiFe responsive to visible light 2 V 3 o 11 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/847
Inventor 郭欢欢方亮李洁
Owner SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD