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Visible-light response photocatalyst Nd2ZnW3O13 and preparation method thereof

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

Inactive Publication Date: 2014-12-24
GUILIN UNIVERSITY OF TECHNOLOGY
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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 Nd 2 o 3 , ZnO and WO 3 Raw powder by Nd 2 wxya 3 o 13 The composition weighs the ingredients.

[0020] (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.

[0021] (3) Pre-fire the uniformly mixed powder in step (2) at 800°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, that is, Nd 2 wxya 3 o 13 powder.

[0022] The prepared photocatalyst can remove 97.1% of methyl orange in 60 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 2

[0024] (1) 99.9% analytically pure chemical raw material Nd 2 o 3 , ZnO and WO 3 Raw powder by Nd 2 wxya 3 o 13 The composition weighs the ingredients.

[0025] (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.

[0026] (3) Pre-fire the uniformly mixed powder in step (2) at 830°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, Nd 2 wxya 3 o 13 powder.

[0027] 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

[0029] (1) 99.9% analytically pure chemical raw material Nd 2 o 3 , ZnO and WO 3 Raw powder by Nd 2 wxya 3 o 13 The composition weighs the ingredients.

[0030] (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.

[0031] (3) Pre-fire the uniformly mixed powder in step (2) at 850°C and keep it warm for 6 hours, then 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 Nd 2 wxya 3 o 13 powder.

[0032] 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 invention discloses a visible-light response photocatalyst Nd2ZnW3O13 and a preparation method thereof. A chemical composition formula of the photocatalyst is Nd2ZnW3O13. The preparation method comprises the steps as follows: (1), chemical raw materials Nd2O3, ZnO and WO3 with 99.9% analytically pure are weighed and prepared according to the chemical formula of Nd2ZnW3O13; (2), the raw materials prepared in the step (1) are mixed, placed in a ball milling tank, added with zirconia balls and distilled water and subjected to ball milling for 8 h, and the mixture is mixed, milled finely, taken out for drying and screened by a 200-mesh sieve; and (3), powder uniformly mixed in the step (2) is pre-sintered at the temperature of 800 DEG C-850 DEG C, subjected to heat preservation for 6 h and naturally cooled to the room temperature, then the particle diameter becomes smaller than 2 mu m in a ball mill smashing mode, and the Nd2ZnW3O13 powder is obtained. The preparation method is simple, the cost is low, and the prepared photocatalyst has good catalytic performance, a harmful chemical substance degradation function under the visible light irradiation, good stability and good application prospect.

Description

technical field [0001] The invention relates to a photocatalyst Nd which responds to visible light 2 wxya 3 o 13 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): B01J23/30
Inventor 方维双郭欢欢李洁
Owner GUILIN UNIVERSITY OF TECHNOLOGY