A method of preparing a macroporous/mesoporous stannic sulfide/titanium dioxide photocatalyst

A technology of titanium dioxide and photocatalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low photocatalytic activity and low quantum efficiency, and achieve simple operation, low cost, and synthesis The effect of mild conditions

Active Publication Date: 2017-02-08
襄阳市大学科技园发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, during the photocatalytic reaction process of titanium dioxide, photogenerated electrons and holes are easily combined, and the quantum efficiency is low, so the photocatalytic activity of titanium dioxide under sunlight is very low.

Method used

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  • A method of preparing a macroporous/mesoporous stannic sulfide/titanium dioxide photocatalyst
  • A method of preparing a macroporous/mesoporous stannic sulfide/titanium dioxide photocatalyst
  • A method of preparing a macroporous/mesoporous stannic sulfide/titanium dioxide photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A kind of preparation method of macroporous / mesoporous tin sulfide / titanium dioxide photocatalyst, comprises the following steps:

[0024] (1) 3.5 grams of butyl phthalate are first added to 2 milliliters of absolute ethanol;

[0025] (2) 1.75 grams of tin tetrachloride pentahydrate are joined in the above-mentioned (1) solution;

[0026] (3) 0.78 gram of sodium sulfide is dissolved in 100 milliliters of water;

[0027] (4) Add the above-mentioned (2) solution dropwise to the above-mentioned (3) solution, and then let stand for 24 hours;

[0028] (5) Transfer the precipitate and solution prepared in step (4) into a hydrothermal kettle, keep it warm at 180°C for 6 hours, clean the hydrothermal precipitate, and dry to obtain macroporous / mesoporous vulcanization Tin / TiO2 composite photocatalyst.

[0029] figure 1 It is a scanning electron microscope image of the macroporous / mesoporous tin sulfide / titanium dioxide composite photocatalyst prepared in this example. It can...

Embodiment 2

[0034] A kind of preparation method of macroporous / mesoporous tin sulfide / titanium dioxide photocatalyst, comprises the following steps:

[0035] (1) 5 grams of butyl phthalate are first added to 2 milliliters of absolute ethanol;

[0036] (2) 1.5 grams of tin tetrachloride pentahydrate are joined in the above-mentioned (1) solution;

[0037](3) 0.78 gram of sodium sulfide is dissolved in 100 milliliters of water;

[0038] (4) Add the above-mentioned (2) solution dropwise to the above-mentioned (3) solution, and then let stand for 24 hours;

[0039] (5) Transfer the precipitate and solution prepared in step (4) into a hydrothermal kettle, keep it warm at 180°C for 6 hours, clean the hydrothermal precipitate, and dry to obtain macroporous / mesoporous vulcanization Tin / TiO2 composite photocatalyst.

Embodiment 3

[0041] A kind of preparation method of macroporous / mesoporous tin sulfide / titanium dioxide photocatalyst, comprises the following steps:

[0042] (1) 3 grams of butyl phthalate are first added to 2 milliliters of absolute ethanol;

[0043] (2) 3 grams of tin tetrachloride pentahydrate are joined in the above-mentioned (1) solution;

[0044] (3) 0.78 gram of sodium sulfide is dissolved in 100 milliliters of water;

[0045] (4) Add the above-mentioned (2) solution dropwise to the above-mentioned (3) solution, and then let stand for 24 hours;

[0046] (5) Transfer the precipitate and solution prepared in step (4) into a hydrothermal kettle, keep it warm at 180°C for 6 hours, clean the hydrothermal precipitate, and dry to obtain macroporous / mesoporous vulcanization Tin / TiO2 composite photocatalyst.

[0047] Above-mentioned embodiment 2 and 3 in conjunction with embodiment 1 are the embodiment designed in order to examine the mass ratio of butyl phthalate and tin tetrachloride p...

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Abstract

A method of preparing a macroporous / mesoporous stannic sulfide / titanium dioxide photocatalyst is disclosed. The method includes steps of adding absolute ethanol into butyl phthalate, adding tin tetrachloride into the abovementioned solution, and labeling the solution as an A solution, preparing a sodium sulfide solution that has a certain concentration and that is labeled as a B solution, adding the A solution dropwise into the B solution, allowing the mixture to stand for 24 h, transferring the prepared precipitate and solution into a hydrothermal kettle, maintaining the temperature at 180 DEG C for 3-9 h, cleaning the precipitate after hydrothermal treatment, and drying to obtain the macroporous / mesoporous stannic sulfide / titanium dioxide composite photocatalyst. The composite photocatalyst prepared by the method has good visible light photocatalytic activity and can rapidly degrade organic pollutants under visible light.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts. Specifically relates to a preparation method of macroporous / mesoporous tin sulfide / titanium dioxide photocatalyst. Background technique [0002] Titanium dioxide is a photocatalyst with a band gap of 3.2eV, which can only be excited by ultraviolet light with a wavelength less than 387nm. However, ultraviolet light in sunlight only accounts for about 4.5%, while visible light accounts for about 45%. In addition, during the photocatalytic reaction process of titanium dioxide, photogenerated electrons and holes are easily combined, and the quantum efficiency is low, so the photocatalytic activity of titanium dioxide under sunlight is very low. [0003] The visible light photocatalytic activity of titanium dioxide can be effectively improved by compounding narrow-band semiconductors. Tin sulfide is a narrow-band semiconductor photocatalyst with a forbidden band width of about 2.18-2.44eV, wh...

Claims

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Application Information

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IPC IPC(8): B01J27/04
CPCB01J27/04B01J35/39
Inventor 戴高鹏周欢刘素芹汪万强
Owner 襄阳市大学科技园发展有限公司
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