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Visible light-responsive photocatalyst smnbmo2o10 and its preparation method

A photocatalyst and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Low efficiency and other problems, to achieve the effect of low cost, wide spectral response range, high light conversion efficiency

Active Publication Date: 2016-05-18
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

[0018] (1) 99.9% analytically pure chemical raw material Sm 2 o 3 , Nb 2 o 5 and MoO 3 , by SmNbMo 2 o 10 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 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, to obtain SmNbMo 2 o 10 powder.

[0021] The prepared photocatalyst can remove 97.4% 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 Sm 2 o 3 , Nb 2 o 5 and MoO 3 , by SmNbMo 2 o 10 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 730°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 2μm, that is, SmNbMo 2 o 10 powder.

[0026] The prepared photocatalyst can remove 97.3% 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 Sm 2 o 3 , Nb 2 o 5 and MoO 3 , by SmNbMo 2 o 10 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 750°C, keep it warm for 6 hours, cool to room temperature naturally, and then use a ball mill to pulverize the average particle diameter to be smaller than 2 μm, that is, to obtain SmNbMo 2 o 10 powder.

[0031] The prepared photocatalyst can remove 98.0% of methyl orange in 60 minutes under the irradiation of visible light with wavelength greater than 420nm.

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Abstract

The present invention discloses a SmNbMo2O10 photocatalyst responsive to visible light and a method of preparation. The chemical composition formula of the photocatalyst is SmNbMo2O10. The present invention also discloses a method for preparing the material. The photocatalyst of the present invention obtained have a broad spectral response range, high optical conversion efficiency and good stability has the effect of decomposing harmful chemicals, organic biomass and sterilized under visible light irradiation; further preparation method is simple, low synthesis temperature, the cost of low for industrial production and application.

Description

technical field [0001] The invention relates to a photocatalyst SmNbMo responsive to visible light 2 o 10 The invention and a preparation method thereof belong to the field of inorganic photocatalytic materials. Background technique [0002] With the development of social 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 oxidatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/28B01J35/02B01J35/00
Inventor 李洁郭欢欢方亮
Owner SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD