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Photocatalyst responsive to visible light and preparation method thereof

A photocatalyst and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of poor stability and short catalytic activity time, and achieve good stability and wide spectral response range. , the effect of low synthesis temperature

Active Publication Date: 2017-01-11
深圳星帮尼环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Na 2 Bi 4 o 6 Cl 2 Has a certain visible light catalytic activity, but the catalytic activity time is short and the stability is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) NaCl and La with a purity of more than 99.9% (weight percentage) 2 o 3 Raw powder by Na 2 La 4 o 6 Cl 2 The composition weighs the ingredients.

[0017] (2) Mix the raw materials in step (1) by wet ball milling for 12 hours. The ball milling medium is anhydrous ethanol. After drying, they are calcined in a nitrogen atmosphere at 1000°C for 8 hours, cooled naturally to room temperature, and then pulverized by a ball mill to reduce the average particle diameter. At 2μm, get Na 2 La 4 o 6 Cl 2 powder.

[0018] 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

[0020] (1) NaCl and La with a purity of more than 99.9% (weight percentage) 2 o 3 Raw powder by Na 2 La 4 o 6 Cl 2 The composition weighs the ingredients.

[0021] (2) Mix the raw materials in step (1) by wet ball milling for 12 hours. The ball milling medium is anhydrous ethanol. After drying, they are calcined in a nitrogen atmosphere at 1020°C for 8 hours, cooled naturally to room temperature, and then pulverized by a ball mill to reduce the average particle diameter. At 2μm, get Na 2 La 4 o 6 Cl 2 powder.

[0022] The prepared photocatalyst can remove 98% of methyl orange in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 3

[0024] 1) NaCl and La with a purity of more than 99.9% (weight percent) 2 o 3 Raw powder by Na 2 La 4 o 6 Cl 2 The composition weighs the ingredients.

[0025] (2) Mix the raw materials in step (1) by wet ball milling for 12 hours. The ball milling medium is anhydrous ethanol. After drying, they are calcined in a nitrogen atmosphere at 1050°C for 8 hours, cooled naturally to room temperature, and then pulverized by a ball mill to reduce the average particle diameter. At 2μm, get Na 2 La 4 o 6 Cl 2 powder.

[0026] The prepared photocatalyst can remove 97.5% 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 responding photocatalyst Na2La4O6C12 and a preparation method thereof. The chemical constitution formula of the photocatalyst is Na2La4O6C12. The invention also discloses the preparation method of the visible light responding photocatalyst Na2La4O6C12. The photocatalyst has the advantages of wide spectral response range, high light conversion efficiency, good stability and the like, and has functions of decomposing harmful chemical substances and organic biomasses and sterilizing under irradiation of visible light.

Description

technical field [0001] The invention relates to a chlorine-containing compound photocatalyst responding to visible light and a preparation method thereof, belonging 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): B01J27/06
Inventor 苏聪学陈硕平孙振
Owner 深圳星帮尼环保科技有限公司