A kind of molybdenum disulfide composite nano-gold photocatalyst and preparation method thereof

A molybdenum disulfide and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of complex catalyst preparation methods and low catalyst activity, and achieve improved photocatalytic activity and dispersion Good, evenly distributed effect

Active Publication Date: 2017-02-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a molybdenum disulfide composite nano-gold photocatalyst and its preparation method, which solves the problems of complex preparation methods and low catalyst activity of existing catalysts

Method used

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  • A kind of molybdenum disulfide composite nano-gold photocatalyst and preparation method thereof
  • A kind of molybdenum disulfide composite nano-gold photocatalyst and preparation method thereof

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Embodiment 1

[0022] A preparation method of molybdenum disulfide composite nano-gold photocatalyst, comprising the following steps:

[0023] Step 1: Prepare molybdenum disulfide nanoparticles by hydrothermal method: add 0.48g sodium molybdate and 0.76g thiourea to 40mL deionized water, stir and mix evenly, transfer the mixed solution to a 50mL polytetrafluoroethylene liner In an autoclave, keep the autoclave at 240°C for 24 hours; after cooling, filter to obtain a black solid, and wash it with deionized water for 5 times to obtain molybdenum disulfide nanoparticles;

[0024] Step 2: Add 0.04g of molybdenum disulfide nanoparticles prepared in step 1 into 20mL of deionized water, stir and mix evenly, then add 2mL of 0.024mol / L chloroauric acid solution and 4mL of 0.02mol / L citric acid dropwise Sodium solution, stirring continuously during the dropwise addition;

[0025] Step 3: irradiate the mixture obtained in step 2 under a 500W xenon lamp for 5 minutes, keep stirring continuously during ...

Embodiment 2

[0029] A preparation method of molybdenum disulfide composite nano-gold photocatalyst, comprising the following steps:

[0030] Step 1: Prepare molybdenum disulfide nanoparticles by hydrothermal method: add 0.48g sodium molybdate and 0.76g thiourea to 40mL deionized water, stir and mix evenly, transfer the mixed solution to a 50mL polytetrafluoroethylene liner In an autoclave, keep the autoclave at 240°C for 24 hours; after cooling, filter to obtain a black solid, wash it with deionized water for 5 times, and obtain molybdenum disulfide nanoparticles;

[0031] Step 2: Add 0.05g of molybdenum disulfide nanoparticles prepared in step 1 into 20mL of deionized water, stir and mix evenly, and then add 1mL of 0.024mol / L chloroauric acid solution and 3mL of 0.02mol / L vitamin C, stirring constantly during the dropping process;

[0032] Step 3: irradiate the mixed solution obtained in step 2 under a 400W xenon lamp for 8 minutes, keep stirring continuously during the irradiation proce...

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Abstract

The invention provides a molybdenum disulfide composite nano-gold photocatalyst and a preparation method thereof, belonging to the field of nano-composite photocatalysts. The photocatalyst is obtained by compounding molybdenum disulfide nanoparticles and gold nanoparticles, and the molar ratio of molybdenum disulfide nanoparticles to gold nanoparticles is (5-20):1. The specific method is: first prepare molybdenum disulfide nanoparticles by hydrothermal method; then disperse molybdenum disulfide nanoparticles in water, and dropwise add chloroauric acid solution and antioxidant solution, mix evenly, molybdenum disulfide, chloroauric acid and The molar ratio of antioxidants is (5-20): 1: (1-3); the mixed solution is irradiated under 200-1000W xenon lamp for 2-10 minutes, stirring continuously during the light, and continuing to stir for 1-5 hours after stopping the light; separation and washing and drying to obtain the photocatalyst. The method of the invention has simple operation, mild reaction conditions, good repeatability, avoids high-temperature sintering treatment, and the obtained photocatalyst has high activity.

Description

technical field [0001] The invention belongs to the field of nano-composite photocatalysts, in particular to a molybdenum disulfide composite nano-gold photocatalyst and a preparation method thereof. Background technique [0002] Photocatalytic technology has become one of the current research hotspots in solar energy utilization due to its advantages of easy operation, no pollution, and direct use of sunlight. Photocatalytic technology based on semiconductor materials has important applications in the utilization of environment and resources such as water purification, organic synthesis, and photolysis of water to produce hydrogen. It is a high-efficiency, low-energy, clean, and non-secondary pollution technology. [0003] TiO 2 It is a commonly used photocatalyst, which has been widely studied and applied due to its advantages of high photocatalytic activity, stable chemical performance, safety and non-toxicity. However, due to the wide band gap of titanium dioxide, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051
Inventor 王志明林越来张平安周志华牛晓滨巫江李含冬姬海宁
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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