Preparation method of visible light catalyst barium-indium-oxygen

A catalyst and visible light technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low product purity and miscellaneous preparation cycles, and achieve simple process steps and low production costs. , the effect of short production cycle

Inactive Publication Date: 2011-05-25
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
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Problems solved by technology

[0006] The purpose of the present invention is to provide a visible light catalyst barium indium oxide, i.e. BaIn 2 o 4 preparation method

Method used

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  • Preparation method of visible light catalyst barium-indium-oxygen
  • Preparation method of visible light catalyst barium-indium-oxygen
  • Preparation method of visible light catalyst barium-indium-oxygen

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preparation example Construction

[0035] A kind of visible light catalyst barium indium oxide BaIn 2 o 4 A preparation method comprising the steps of:

[0036] (1) Preparation of precursors by co-precipitation method

[0037] Weigh barium nitrate and indium nitrate in different molar ratios (0.9:2; 1:2; 1.1:2 respectively) and dissolve them in 250mL of water, wherein the molar concentrations of barium nitrate are 0.072mol / L and 0.080mol respectively / L and 0.088mol / L, the molar concentration of indium nitrate is 0.16mol / L;

[0038] Weigh sodium carbonate and sodium hydroxide of appropriate quality and dissolve them in 600mL of water, wherein the molar concentrations of sodium carbonate and sodium hydroxide are 0.08mol / L and 0.33mol / L respectively;

[0039] Slowly drop the aqueous solution of barium nitrate and indium nitrate into the aqueous solution of sodium carbonate and sodium hydroxide, and react for 40-60 minutes under the stirring of the booster electric mixer, then stop the mixer and let the solutio...

Embodiment 2

[0046] A kind of visible light catalyst barium indium oxide, namely BaIn 2 o4 A preparation method comprising the steps of:

[0047] (1) Preparation of precursors by co-precipitation method

[0048] Weigh barium nitrate and indium nitrate with a molar ratio of 1.1:2, and dissolve them in 250mL of water, wherein the molar concentrations of barium nitrate and indium nitrate are 0.088mol / L and 0.16mol / L, respectively;

[0049] Weigh sodium carbonate and sodium hydroxide of appropriate quality and dissolve them in 600mL of water, wherein the molar concentrations of sodium carbonate and sodium hydroxide are 0.08mol / L and 0.33mol / L respectively;

[0050] Slowly drop the aqueous solution of barium nitrate and indium nitrate into the aqueous solution of sodium carbonate and sodium hydroxide, and react for 40-60 minutes under the stirring of the booster electric mixer, then stop the mixer and let the solution stand for sedimentation, after about 30 minutes, Pour off the supernatant i...

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Abstract

The invention discloses a preparation method of visible light catalyst barium-indium-oxygen. The method comprises the following steps of: preparing mixed aqueous solution of barium nitrate and indium nitrate in a certain molar ratio; performing a coprecipitation reaction by taking aqueous solution of sodium carbonate and sodium hydroxide as a precipitator so as to prepare a uniformly-mixed precursor; drying the precursor at the temperature of 100 DEG C; and performing high-temperature sintering in a high-temperature furnace at the thermal treatment temperature of between 1,100 DEG C and 1,300 DEG C so as to obtain barium-indium-oxygen with a monoclinic structure. The preparation method of the visible light catalyst barium-indium-oxygen has the advantages of low preparation cost, short period, high product purity, adjustable product particle size, easy operation, and the like.

Description

technical field [0001] The invention relates to a preparation method of barium indium oxide, a visible light photocatalyst, which has important applications in the field of new energy such as photocatalytic decomposition of water (or organic pollutants) to produce hydrogen. Background technique [0002] The use of photocatalysts to decompose water or organic pollutants to produce hydrogen is a new way to solve future energy shortages and reduce environmental pollution, and has attracted more and more attention. The current photocatalyst is mainly TiO 2 , but due to TiO 2 Only the ultraviolet band of solar radiation can be used, and most of the visible light energy cannot be used, which reduces its conversion efficiency. Since Zou et al. found that under the action of visible light, In 1-x Ni x TaO 4 ( x = 0-0.2) can directly split water (see Z. Zou, J. Ye, K. Sayama, and H. Arakawa, Nature 414, 625 (2001)), various types of oxide semiconductors for visible light spli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/08B01J37/03
Inventor 任平张俊喜周立成
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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