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Hydro-thermal synthesis method for molybdenum-sulphur co-doped mesoporous nano titanium dioxide visible-light-driven photocatalyst

A mesoporous titanium dioxide, hydrothermal synthesis technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of loose combination, waste of synthesis time and reaction consumption, etc., to achieve reaction Simple process, high efficiency, tightly combined effect

Inactive Publication Date: 2015-12-16
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The common sulfur and molybdenum co-doped titanium dioxide mainly generates molybdenum disulfide on the surface of titanium dioxide, which will cause two problems. First, because titanium dioxide is first formed and then doped, molybdenum and sulfur elements are mostly surface doped At the same time, molybdenum and sulfur elements are not tightly combined with titanium dioxide; 2. The synthesis of titanium dioxide and doped titanium dioxide are divided into two steps, which is a waste of synthesis time and reaction consumption

Method used

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  • Hydro-thermal synthesis method for molybdenum-sulphur co-doped mesoporous nano titanium dioxide visible-light-driven photocatalyst
  • Hydro-thermal synthesis method for molybdenum-sulphur co-doped mesoporous nano titanium dioxide visible-light-driven photocatalyst

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Embodiment 1

[0022] a. First prepare titanium glycolate according to the prior known technology: take 25mL ethylene glycol, and then pass nitrogen into it for 10 minutes to remove oxygen and moisture. Quickly transfer it into a glove box filled with dry nitrogen or argon. In the glove box, add 1.5 µL of titanium tetrachloride and 1 mL of titanium isopropoxide to the solution and keep stirring for 12 h. Subsequently, the solution was taken out from the glove box, and quickly poured into a mixed solution of 1 mL of water and 100 mL of acetone in a state of rapid stirring, and sealed and stirred for 6 hours. The resulting white product solution was centrifuged several times, and washed several times with water and ethanol to remove excess ethylene glycol on the product surface.

[0023] b. Take 120 mg of the titanium glycolate precursor synthesized above, 97 mg of sodium molybdate dihydrate, 190 mg of thiourea and 60 mL of water to make a solution.

[0024] c. put the solution obtained in t...

Embodiment 2

[0027] The preparation process and steps of this embodiment are basically the same as in Example 1, except that step c: the solution obtained in the previous step is put into a high-pressure reactor with a polytetrafluoroethylene lining and reacted for 12 hours at 200 ° C; After the obtained product is conventionally centrifuged, washed and dried, a molybdenum-sulfur-doped mesoporous titanium dioxide nanometer visible light catalyst is obtained.

Embodiment 3

[0029] The preparation process and steps of this embodiment are basically the same as in Example 1, except that step c: the solution obtained in the previous step is put into a high-pressure reactor with a polytetrafluoroethylene lining and reacted for 1 hour at 200 ° C; After the obtained product is conventionally centrifuged, washed and dried, a molybdenum-sulfur-doped mesoporous titanium dioxide nanometer visible light catalyst is obtained.

[0030] The resulting samples were characterized, and some of the results are shown in the accompanying drawings. It can be found that with the prolongation of the hydrothermal reaction time, the small particles on the surface of the synthesized nanomaterials gradually grow up, and the size of the mesopores also gradually increases.

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Abstract

The invention relates to a hydro-thermal synthesis method for a molybdenum-sulphur co-doped mesoporous nano titanium dioxide visible-light-driven photocatalyst. The method comprises the following steps: preparing an ethylene glycol titaniumprecursor by adopting a known technical method in prior art, mixing the precursor, sodium molybdate, thiourea and water according to a certain ratio to prepare a solution, and implementing a simple hydro-thermal synthesis method to obtain the molybdenum-sulphur co-doped mesoporous nano titanium dioxide visible-light-driven photocatalyst. Shown from an XRD spectrogram, the prepared molybdenum-sulphur co-doped mesoporous nano titanium dioxide visible-light-driven photocatalyst is in a typical anatase structure and has the good crystallinity. The co-doping of molybdenum and sulphur can be proved by the XRD spectrogram. Visible-light-driven photocatalyzing results show that the molybdenum-sulphur co-doped mesoporous nano titanium dioxide visible-light-driven photocatalyst prepared by adopting the method disclosed by the invention has an excellent visible-light-driven photocatalyzing performance, can be used for effectively solving problems of environment pollution and the like, and has potential application prospects in fields of energy and the like.

Description

technical field [0001] The invention relates to a preparation method of titanium dioxide nanometer material, in particular to a hydrothermal synthesis method of molybdenum and sulfur co-doped mesoporous titanium dioxide nanometer visible light catalyst. Background technique [0002] Photocatalytic technology is an environmentally friendly catalytic technology. Due to its clean energy utilization, low energy consumption, mild reaction conditions, no secondary pollution, and easy operation, it has become a research hotspot in the field of environmental governance and energy regeneration. Titanium dioxide, one of the most famous and widely used photocatalysts, has many excellent properties as a photocatalyst, such as: high photoelectric conversion efficiency, chemical stability and non-toxic and harmless. However, only ultraviolet light can excite titanium dioxide to produce interband electronic transitions, so a lot of work and measures are trying to further expand its light-a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/047B01J21/06A62D3/17A62D101/26A62D101/28
Inventor 焦正张云龙程伶俐浦娴娟徐韬丁国际
Owner SHANGHAI UNIV
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