Unlock instant, AI-driven research and patent intelligence for your innovation.

Corundum structured composite oxide photocatalyst Mg4Nb2-xTaxO9 and preparation method thereof

A technology of mg4nb2-xtaxo9 and composite oxides, which is applied in the field of inorganic photocatalytic materials, can solve problems such as poor stability, limited types of photocatalysts, and low photoconversion efficiency, and achieve the effects of low cost, excellent catalytic performance, and simple preparation methods

Active Publication Date: 2014-09-24
安徽上阡科技信息咨询有限公司
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]Although photocatalytic 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 low photoconversion efficiency and poor stability. Therefore, it is necessary to research and develop new high-efficiency photocatalysts with visible light response.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) 99.9% analytically pure chemical raw materials MgO and Ta 2 o 5 , press Mg 4 Ta 2 o 9 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 absolute ethanol, ball mill for 8 hours, mix and grind, take out and dry, and pass through a 200-mesh sieve.

[0020] (3) Pre-fire the uniformly mixed powder in step (2) at 1350°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill to make the particle diameter smaller than 2 μm, and then obtain the composite oxide Mg 4 Ta 2 o 9 powder.

[0021] The prepared photocatalyst has a methyl orange removal rate of 98.3% in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 2

[0023] (1) 99.9% analytically pure chemical raw materials MgO and Nb 2 o 5 , press Mg 4 Nb 2 o 9 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 absolute ethanol, ball mill for 8 hours, mix and grind, take out and dry, and pass through a 200-mesh sieve.

[0025] (3) Pre-fire the uniformly mixed powder in step (2) at 1250°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then pulverize it with a ball mill to make the particle diameter smaller than 2 μm, and then obtain the composite oxide Mg 4 Nb 2 o 9 powder.

[0026] The prepared photocatalyst has a methyl orange removal rate of 98.7% in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

Embodiment 3

[0028] (1) 99.9% analytically pure chemical raw materials MgO and Nb 2 o 5 and Ta 2 o 5 , press Mg 4 NbTaO 9 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 absolute ethanol, ball mill for 8 hours, mix and grind, take out and dry, and pass through a 200-mesh sieve.

[0030] (3) Pre-fire the uniformly mixed powder in step (2) at 1300°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then use a ball mill to make the particle diameter smaller than 2 μm, and then obtain the composite oxide Mg 4 NbTaO 9 powder.

[0031] The prepared photocatalyst has a methyl orange removal rate of 98.6% in 120 minutes under the irradiation of visible light with a wavelength greater than 420nm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an application method a corundum structured composite oxide Mg4Nb(2-x)TaxO9 as visible-light photocatalyst. The chemical composition general formula of the photocatalyst is Mg4Nb(2-x)TaxO9, wherein x is not less than 0 and not more than 2. The invention also discloses the preparation method of the material. The preparation method is simple and is low in cost. The prepared photocatalyst has excellent catalytic performance, has the function of decomposing harmful chemical substances under visible light irradiation and has good stability and good application prospect.

Description

technical field [0001] The invention relates to a corundum structure type composite oxide photocatalyst Mg which responds to visible light 4 Nb 2-x Ta x o 9 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] In 1972, Fujishima discovered TiO 2 Semiconductor electrodes have the effect of photolyzing water under ultraviolet light irradiation, which has triggered an upsurge of research on semiconductor photocatalysis. Its main fields include: (1) Using sunlight as energy and oxygen in the air as oxidant to promote the complete decomposition of organic pollutants in water and air into CO ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/20
Inventor 方亮唐莹韦珍海
Owner 安徽上阡科技信息咨询有限公司