Visible light responded photocatalyst Co4GaSbO8 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., can solve the problem of limited types of photocatalysts, low light conversion efficiency and difficult synthesis and other problems, to achieve the effects of wide visible light response frequency range, high light conversion efficiency and simple preparation method

Inactive Publication Date: 2015-03-25
浦北高迈新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, niobate photocatalyst Pb 3 Nb 4 o 13 、BiNbO 4 and Bi 2 MbO 7 (M=Al, Ga, In, Y, rare earth elements and Fe) etc. and niobium potassium composite oxide photocatalysts such as KNbO 3 , KNb 3 o 8 、K 4 Nb 6 o 17 and K 6 Nb 10.6 o 30 have good photocatalytic performance, but their intrinsic photocatalytic effect is weak or inactive in the visible light range.
[0005] Although photocatalysis research has been carried out for several years, most of the exploration and development of visible light-responsive photocatalysts are based on experience summaries obtained through a large number of experiments. Therefore, the types of photocatalysts reported to respond to visible light are still limited, and there are problems such as low photoconversion efficiency, difficult synthesis, poor stability, and narrow spectral response range. Research and development of new preparations High-efficiency photocatalysts with simple methods and broad-band visible light response are difficult problems that scientists in the field have been eager to solve but have always been difficult to achieve, which largely limits the wide application and development of photocatalysts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) 99.9% analytically pure chemical raw materials CoO, Ga 2 O 3 and Sb 2 O 5 of virgin powder by Co 4 GaSbO 8 The composition of weighing ingredients.

[0020] (2) Mix the raw materials prepared in step (1), put it into a ball mill, add zirconia balls and anhydrous ethanol, ball mill for 8 hours, mix and grind, take out and dry, and pass through a 200-mesh sieve.

[0021] (3) Pre-fire the uniformly mixed powder in step (2) at 770°C, keep the temperature for 6 hours, naturally cool to room temperature, and then pulverize by a ball mill to make the average particle diameter smaller than 2 μm, that is, to obtain Co. 4 GaSbO 8 powder.

[0022] The prepared photocatalyst can remove 98.1% of methyl orange in 60 minutes under the irradiation of visible light with a wavelength greater than 420 nm.

Embodiment 2

[0024] (1) 99.9% analytically pure chemical raw materials CoO, Ga 2 O 3 and Sb 2 O 5 of virgin powder by Co 4 GaSbO 8 The composition of weighing ingredients.

[0025] (2) Mix the raw materials prepared in step (1), put it into a ball mill, add zirconia balls and anhydrous ethanol, ball mill for 8 hours, mix and grind, take out and dry, and pass through a 200-mesh sieve.

[0026] (3) Pre-fire the uniformly mixed powder in step (2) at 800°C, keep the temperature for 6 hours, cool to room temperature naturally, and then pulverize by a ball mill to make the average particle diameter smaller than 2 μm, that is, to obtain Co. 4 GaSbO 8 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 420 nm.

Embodiment 3

[0029] (1) 99.9% analytically pure chemical raw materials CoO, Ga 2 O 3 and Sb 2 O 5 of virgin powder by Co 4 GaSbO 8 The composition of weighing ingredients.

[0030] (2) Mix the raw materials prepared in step (1), put it into a ball mill, add zirconia balls and anhydrous ethanol, ball mill for 8 hours, mix and grind, take out and dry, and pass through a 200-mesh sieve.

[0031] (3) Pre-fire the uniformly mixed powder in step (2) at 820 °C, keep the temperature for 6 hours, naturally cool to room temperature, and then pulverize by a ball mill to make the average particle diameter smaller than 2 μm, that is, to obtain Co. 4 GaSbO 8 powder.

[0032] The prepared photocatalyst can remove 97.4% of methyl orange in 60 min under the irradiation of visible light with a wavelength greater than 420 nm.

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Abstract

The invention discloses a wideband and efficient visible light responded photocatalyst Co4GaSbO8 and the preparation method thereof. The chemical constitution formula of the photocatalyst is Co4GaSbO8. The invention further discloses a preparation method of the aforementioned material. The obtained photocatalyst has the advantages of wide spectral response range, high light conversion efficiency, good stability, and the like. Under the irradiation of visible light, the photocatalyst has effects of resolving harmful chemical substances, organic biomass, and sterilization; additionally, the preparation method is simple, the synthesizing temperature is low, and the photocatalyst is applicable to industrial production and application.

Description

technical field [0001] The present invention relates to a visible light-responsive photocatalyst Co 4 GaSbO 8 The invention and the 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, the use of photocatalysts to decompose organic substances such as pesticides and malodorous substances in water and the atmosphere, and the self-cleaning of photocatalyst-coated solid surfaces have been proposed. The principle of the photocatalytic reaction is that the photocatalyst generates holes and electrons after absorbing photons with energy higher than its band gap. These holes and electrons undergo ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843
Inventor 韦珍海覃杏柳苏聪学
Owner 浦北高迈新能源科技有限公司
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