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Photocatalyst Ba6Ti17O40 with visible light response and preparation method thereof

A ba6ti17o40, photocatalyst technology, applied in the field of inorganic photocatalytic materials, can solve the problems of no visible light response photocatalytic performance, poor stability, low photoconversion efficiency, etc., and achieve excellent catalytic performance, low cost and simple preparation method

Active Publication Date: 2014-01-15
扬州中洲医疗器械有限公司
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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
Titanate BaTi has been reported 4 o 9 Preparation, microwave dielectric properties and photocatalytic properties research report, but BaTi 4 o 9 Photocatalytic performance not available in the visible light band
we are right 6 Ti 17 o 40 and Sr 6 Ti 17 o 40 、Ba 2 Ti 9 o 20 and other titanates conducted photocatalytic performance research in the visible light band, and found that Ba 6 Ti 17 o 40 photocatalytic performance with excellent visible light response, but the Sr 6 Ti 17 o 40 and Ba 2 Ti 9 o 20 Photocatalytic properties without visible light response

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) 99.9% analytically pure chemical raw material BaCO 3 and TiO 2 , press Ba 6 Ti 17 o 40 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 1200°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 get Ba titanate 6 Ti 17 o 40 powder.

[0021] The prepared photocatalyst can remove 98.3% 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 BaCO 3 and TiO 2 , press Ba 6 Ti 17 o 40 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 1220°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 get Ba titanate 6 Ti 17 o 40 powder.

[0026] 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 3

[0028] (1) 99.9% analytically pure chemical raw material BaCO 3 and TiO 2 , press Ba 6 Ti 17 o 40 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 1240°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 get Ba titanate 6 Ti 17 o 40 powder.

[0031] 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.

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Abstract

The invention discloses a photocatalyst Ba6Til7O40 with visible light response and a preparation method thereof. The chemical structural formula of the titanate photocatalyst is Ba6Til7O40. The invention also discloses the preparation method of the material. The preparation method is simple and low in cost, and the prepared photocatalyst has a good catalytic performance, has a function of decomposing harmful chemicals under irradiation of visible light, and has good stability and a good application prospect.

Description

technical field [0001] The present invention relates to a kind of photocatalyst Ba of visible light response 6 Ti 17 o 40 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 elec...

Claims

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Application Information

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IPC IPC(8): B01J23/02C01G23/00
Inventor 方亮唐莹韦珍海
Owner 扬州中洲医疗器械有限公司