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Preparation method of bismuth sulfide/bismuth molybdenum oxide heterojunction photocatalytic composite material

A molybdenum bismuth oxide, composite material technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc.

Active Publication Date: 2014-03-05
ZHENJIANG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have certain limitations, therefore, the development of a new type of efficient and practical environmental protection treatment technology has become a hot research topic

Method used

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  • Preparation method of bismuth sulfide/bismuth molybdenum oxide heterojunction photocatalytic composite material
  • Preparation method of bismuth sulfide/bismuth molybdenum oxide heterojunction photocatalytic composite material
  • Preparation method of bismuth sulfide/bismuth molybdenum oxide heterojunction photocatalytic composite material

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Embodiment 1

[0023] (1) Preparation of BiOBr microspheres: Bi(NO3) 3 ·5H 2 O was dissolved in ethylene glycol monomethyl ether to make a solution with a concentration of 0.03-0.04mol / L and stirred evenly. During the stirring process, cetyltrimethylammonium bromide (CTAB) was added to ensure a concentration of 0.2 -0.3mol / L, then pour the solution into a polytetrafluoroethylene reactor and put it in an oven, the reaction temperature is 150-200°C, and the reaction time is 8-12 hours. After the reaction was completed, the reactor was cooled to room temperature and washed repeatedly with deionized water and alcohol. Put the washed BiOBr solution into an oven at 60° C. to dry to obtain dried BiOBr microparticles.

[0024] (2) Preparation of Bi 2 S 3 / Bi 2 MoO 6 Heterojunction photocatalytic composite material: weighed 0.462g BiOBr microparticles, 0.3g NaMoO 4 2H 2 O, 0.12g NaCl, 0.09g CTAB, and 0.3g NaSCN were put into a 100ml reaction kettle in sequence, and at the same time, 60ml of d...

Embodiment 2

[0026] The preparation process of the BiOBr microspheres of this embodiment is the same as that of Embodiment 1.

[0027] The difference is that the content of step (2) is as follows: Weigh 0.462g BiOBr, 0.36g NaMoO 4 2H 2 O, 0.15g NaCl, 0.108g CTAB, and 0.33g NaSCN were put into a 100ml reaction kettle in turn, and at the same time, 60ml of distilled water was weighed with a measuring cylinder and added to the reaction kettle and stirred for 45 minutes. Adjust the pH of the reaction solution to 3, put the reaction kettle into an oven at a temperature of 180° C., and react for 36 hours. After the reaction is finished, the reaction kettle is lowered to room temperature, and washed by a centrifuge. The washing solution is distilled water and absolute ethanol. The number of centrifuges is 3 to 5 times. The sample is put into an oven and dried at 60°C. to get Bi 2 S 3 / Bi 2 MoO 6 Heterojunction Photocatalytic Composite Materials.

Embodiment 3

[0029] The preparation process of the BiOBr microspheres of this embodiment is the same as that of Embodiment 1.

[0030] The difference is that the content of step (2) is as follows: Prepare the weighed 0.462g BiOBr, and weigh 0.42g NaMoO 4 2H 2 O, 0.18g NaCl, 0.12g tetrabutylammonium bromide, and 0.36g NaSCN were successively put into a 100ml reaction kettle, and at the same time, 60ml of distilled water was weighed with a graduated cylinder and added to the reaction kettle and stirred for 60 minutes. Adjust the pH of the reaction solution to 4, put the reaction kettle into an oven at a temperature of 200° C., and react for 48 hours. After the reaction is finished, the reaction kettle is lowered to room temperature, and washed by a centrifuge. The washing solution is distilled water and absolute ethanol. The number of centrifuges is 3 to 5 times. The sample is put into an oven and dried at 60°C. to get Bi 2 S 3 / Bi 2 MoO 6 Heterojunction Photocatalytic Composite Materi...

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Abstract

The invention relates to a preparation method of a bismuth sulfide / bismuth molybdenum oxide heterojunction photocatalytic composite material. The preparation method is characterized by comprising the steps of dispersing BiOBr micro-sphere particles in de-ionized water in a proportion of 7.7g / L, and uniformly stirring; adding a molybdenum source: sodium molybdate, sodium chloride, sodium thiocyanate and a surfactant to a solution (1) and stirring for 30-60min; regulating pH value of the solution to be acid through hydrochloric acid; pouring the mixed solution into a stainless steel reaction kettle, and reacting for 24-48 hours at 150-200 DEG C; after reaction, naturally cooling, centrifuging and washing a reaction product for times through de-ionized water and ethanol, and drying the product to obtain the Bi2S3 / Bi2MoO6 heterojunction composite material. The preparation method is simple and convenient to operate and is low in reaction temperature, and the prepared composite material is excellent in photocatalytic performance.

Description

technical field [0001] The present invention relates to the technical field of preparation of nano-inorganic functional materials, in particular to an in-situ preparation of bismuth sulfide / molybdenum bismuth oxide (BiOBr) using bismuth oxybromide (BiOBr) as a sacrificial template. 2 S 3 / Bi 2 MoO 6 ) method for heterojunction photocatalysts. technical background [0002] With the development of human beings and social progress, increasingly serious environmental problems have increasingly affected and endangered human production and life. In order to solve environmental problems, humans have developed a variety of physical adsorption, biodegradation and chemical decomposition methods to deal with pollutants and have played a certain role. However, these methods have certain limitations. Therefore, the development of a new type of efficient and practical environmental protection treatment technology has become a research hotspot. Photocatalyst can thoroughly decompose o...

Claims

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Application Information

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IPC IPC(8): B01J27/051
Inventor 唐国钢张毅
Owner ZHENJIANG COLLEGE
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