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Hydro-thermal synthesis method of visible light photocatalyst mesoporous Bi2WO6

A photocatalyst and hydrothermal synthesis technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., achieves good morphology, simple synthesis method and low cost Effect

Inactive Publication Date: 2013-07-10
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most materials are only available under ultraviolet conditions, which has great limitations for practical applications.

Method used

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  • Hydro-thermal synthesis method of visible light photocatalyst mesoporous Bi2WO6
  • Hydro-thermal synthesis method of visible light photocatalyst mesoporous Bi2WO6
  • Hydro-thermal synthesis method of visible light photocatalyst mesoporous Bi2WO6

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A visible-light photocatalyst mesoporous Bi 2 WO 6 The hydrothermal synthesis method, the steps are as follows:

[0023] 1) Add 0.485g of Bi(NO 3 ) 3 1mol / L HNO dissolved in 10ml 3 In, solution A is obtained;

[0024] 2) Add 0.145g of Na 2 WO 4 Dissolve in 10ml of deionized water and stir to obtain solution B;

[0025] 3) Under vigorous stirring, drop solution B into solution A drop by drop, then add 0.1 g of CTAB, and stir vigorously for 30 minutes to obtain a mixed solution;

[0026] 4) Transfer the mixed solution to a reaction kettle with a PTFE liner of 30ml, and react at a constant temperature at 180°C for 24 hours under hydrothermal conditions;

[0027] 5) The white precipitate obtained after the reaction was centrifuged, washed 2-3 times with deionized water and absolute ethanol, and air-dried under natural conditions to obtain a light yellow powder, which is the target Bi 2 WO 6 catalyst of light.

Embodiment 2

[0029] A visible-light photocatalyst mesoporous Bi 2 WO 6 The hydrothermal synthesis method, the steps are as follows:

[0030] 1) Add 0.485g of Bi(NO 3 ) 3 1mol / L HNO dissolved in 10ml 3 In, solution A is obtained;

[0031] 2) Add 0.145g of Na 2 WO 4 Dissolve in 10ml of deionized water and stir to obtain solution B;

[0032] 3) Under vigorous stirring, drop solution B into solution A drop by drop, then add 0.1 g of PEG10000, stir vigorously for 30 minutes to obtain a mixed solution;

[0033] 4) Transfer the mixed solution to a reaction kettle with a PTFE liner of 30ml, and react at a constant temperature at 180°C for 24 hours under hydrothermal conditions;

[0034] 5) The white precipitate obtained after the reaction was centrifuged, washed 2-3 times with deionized water and absolute ethanol, and air-dried under natural conditions to obtain a light yellow powder, which is the target Bi 2 WO 6 catalyst of light.

[0035] figure 1 For the Bi prepared in Example 1,2 ...

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Abstract

The invention discloses a hydro-thermal synthesis method of a visible light photocatalyst mesoporous Bi2WO6. The hydro-thermal synthesis method comprises the following steps of: dissolving bismuth nitrate into a salpeter solution and stirring so as to obtain a solution A; dissolving sodium tungstate in deionized water and stirring so as to obtain a solution B; dropwisely adding the solution B in the solution A under intense agitation, adding a template agent and stirring so as to obtain a mixing solution, transferring the mixing solution to a reaction kettle an inner container of which is made of polytetrafluoroethylene, and carrying out a 180-degree thermostatic reaction for 24h, so as to obtain white precipitate; and washing for 2-3 times respectively by utilizing deionized water and absolute ethyl alcohol, and carrying out natural air-drying on a product so as to obtain a target object. The hydro-thermal synthesis method provided by the invention has the advantages that the process of the synthesis method is simple, the cost is low, the reaction is mild, the morphology of the product is good, the photocatalytic degradation efficiency is high, and the product is easy to recover, a prepared Bi2WO6 photocatalyst is of a three-dimensional flower shape assembled by nanosheets and has a mesoporous level structure, the Bi2WO6 photocatalyst has high catalytic activity on Rhodamine B, different template agents are adopted so as to have different influences on the degradation and morphology of the product, and the comparison phenomenon is obvious.

Description

technical field [0001] The present invention belongs to the preparation of photocatalyst, especially a kind of visible light photocatalyst mesoporous Bi 2 WO 6 hydrothermal synthesis method. Background technique [0002] In recent years, various organic pollutants have been increasing, and photocatalytic technology, as an advanced oxidation engineering, has more and more applications in photocatalytic degradation of dyes. However, most materials are only available under ultraviolet conditions, which has great limitations for practical applications. Therefore, it is necessary to prepare catalysts with better effects under visible light. [0003] Due to its unique properties and high light utilization efficiency, bismuth-based composite oxides have great potential in research. Bi 2 WO 6 As one of such compounds, it shows better light utilization efficiency under the irradiation of visible light. This experiment is to synthesize samples with different morphology and diffe...

Claims

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Application Information

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IPC IPC(8): B01J23/31
Inventor 郭雪静胡梦圆朱娜刘璐
Owner NANKAI UNIV
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