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

Niobate photocatalyst K3MNb7O21 and preparation method thereof

A k3mnb7o21, photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, niobium compounds, etc., can solve the problems of limited types of photocatalysts, low light conversion efficiency, poor stability, etc., to achieve excellent catalytic performance, preparation Simple method and low cost effect

Active Publication Date: 2015-01-07
东台城东科技创业园管理有限公司
View PDF5 Cites 0 Cited by
  • 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

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 material K 2 CO 3 、TiO 2 and Nb 2 o 5 , press K 3 TiNb 7 o 21 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 until fine, take it out and dry it, and pass through a 200-mesh sieve.

[0020] (3) Pre-fire the uniformly mixed powder in step (2) at 1050°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 to obtain niobate K 3 TiNb 7 o 21 powder.

[0021] The prepared photocatalyst can remove 98.7% of methyl orange 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 material K 2 CO 3 , SnO 2 and Nb 2 o 5 , press K 3 SnNb 7 o 21 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 until fine, take it out and dry it, and pass through a 200-mesh sieve.

[0025] (3) Pre-fire the uniformly mixed powder in step (2) at 1070°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 to obtain niobate K 3 SnNb 7 o 21 powder.

[0026]The prepared photocatalyst can remove 98.1% of methyl orange 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 material K 2 CO 3 , ZrO 2 and Nb 2 o 5 , press K 3 ZrNb 7 o 21 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 until fine, take it out and dry it, and pass through a 200-mesh sieve.

[0030] (3) Pre-fire the uniformly mixed powder in step (2) at 1080°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 you can get niobate K 3 ZrNb 7 o 21 powder.

[0031] The prepared photocatalyst can remove 98.9% of methyl orange 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 a visible-light responding niobate photocatalyst K3MNb7O21 and a preparation method thereof. The chemical composition general formula of the niobate photocatalyst is K3MNb7O21, wherein M is one of Ti, Sn and Zr. 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 visible light responsive niobate photocatalyst K 3 Nb 7 o 21 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] In 1972, Fujishima discovered TiO 2 Semiconductor electrodes can photolyze 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 2 、H 2 O and other inorganic salts are an ideal pollutant ...

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): B01J23/20C01G33/00
Inventor 方亮唐莹韦珍海
Owner 东台城东科技创业园管理有限公司