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Preparation method and equipment of efficient composite photocatalyst

A composite photocatalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of difficult precise control of reaction conditions, recombination of photogenerated electrons and holes, slow charge transfer efficiency, etc. , to achieve the effects of improving photocatalytic performance, inhibiting recombination, and enhancing photocatalytic performance

Pending Publication Date: 2021-08-20
HENAN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But TiO 2 The bandgap width is 3.2eV, which belongs to wide bandgap semiconductor and can only absorb ultraviolet light with a wavelength less than 390nm
Therefore, in the application process of photocatalysis, there are obvious defects, such as low utilization rate of sunlight, serious recombination of photogenerated electrons and holes, and slow effective charge transfer efficiency.
[0003] Meanwhile, the existing production facilities produce RGO / MoS 2 / TiO 2 There are often problems such as low production efficiency and difficult precise control of reaction conditions

Method used

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  • Preparation method and equipment of efficient composite photocatalyst
  • Preparation method and equipment of efficient composite photocatalyst
  • Preparation method and equipment of efficient composite photocatalyst

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specific Embodiment approach 1

[0074] RGO / MoS 2 / TiO 2 The preparation of efficient composite photocatalyst (adopting the equipment that specific embodiment 1 provides), comprises the following steps:

[0075] (1) TiO 2 preparation;

[0076] (2)MoS 2 preparation;

[0077] (3) Preparation of TiO 2 / MoS 2 ;

[0078] (4) Take the GO solution, ultrasonically make it into a uniformly dispersed solution, and add the TiO obtained in step (3) 2 / MoS 2 Composite materials, ultrasonically disperse them evenly;

[0079] (5) The uniformly dispersed solution obtained in step (4) is transferred to an autoclave, heated for reaction, and cooled to room temperature;

[0080] (6) Wash, dry and grind the product of step (5) to obtain RGO / MoS 2 / TiO 2 High-efficiency composite photocatalyst.

[0081] The concentration of GO solution described in step (4) is 4mg·mL -1 , Ultrasonic time is 20min and 2h respectively.

[0082] Step (1) includes:

[0083] 1) Take absolute ethanol, glacial acetic acid, and distilled ...

specific Embodiment approach 2

[0105] In one embodiment, such as Figure 1-5 As shown, the RGO / MoS provided by the present invention 2 / TiO 2 The preparation equipment of high-efficiency composite photocatalyst: comprise: microwave synthesis reaction device, described microwave synthesis reaction device is used to carry out continuous microwave synthesis to the uniformly dispersed solution that described step (4) obtains; Described microwave synthesis reaction device is microwave generator;

[0106] The microwave synthesis reaction device includes a reaction barrel and a microwave synthesis device, the microwave synthesis device is located in the reaction barrel, the microwave synthesis device is provided with a start switch, and the start switch is located on the outer wall of the reaction barrel.

[0107] In this embodiment, when the catalyst needs to be prepared, the uniformly dispersed solution obtained in the step (4) is sequentially injected into the reaction barrel, and by starting the start switch...

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Abstract

The invention discloses a preparation method and equipment of a high-efficiency composite photocatalyst, and relates to the field of preparation of environment-friendly scientific catalytic materials. The preparation method comprises the steps of preparing TiO2 and MoS2; preparing a TiO2 / MoS2 composite material; and dispersing the obtained composite material in a GO solution, carrying out heating reaction in a high-pressure reaction kettle, washing, drying and grinding to obtain the efficient composite photocatalyst. According to the invention, RGO is introduced and taken as a carrier, the specific surface area of the composite material is increased, the RGO is taken as an electron transmission medium of the composite material, the separation of photo-induced electrons and holes of the composite material can be effectively enhanced, the recombination phenomenon of the photo-induced electrons and holes is inhibited, electrons generated by excitation of TiO2 and MoS2 can be mutually transmitted, and meanwhile, the surface of the composite material is accumulated to the maximum extent, so that the photocatalytic performance of the composite material is enhanced, and the recycling characteristic of the composite material is also increased.

Description

technical field [0001] The invention relates to the field of preparation of environmental protection scientific catalytic materials, in particular to a preparation method and equipment of a high-efficiency composite photocatalyst. Background technique [0002] With the continuous development of society, environmental pollution and energy application have affected human life and sustainable development of society. At the same time, TiO 2 Photocatalytic materials such as sewage degradation, heavy ion treatment, CO 2 It plays an important catalytic role in the reduction of hydrogen and the production of hydrogen from water. At the same time, its stable performance, low price and cost, and non-toxicity make it widely used. But TiO 2 The bandgap width is 3.2eV, which belongs to wide bandgap semiconductor and can only absorb ultraviolet light with a wavelength less than 390nm. Therefore, in the application process of photocatalysis, there are obvious defects, such as low utili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J35/02B01J37/34B01J35/10B01J19/12B01F13/10B01F11/00C02F1/30C02F1/72C02F101/30B01J35/00
CPCB01J27/051B01J19/126C02F1/30C02F1/725B01J37/346C02F2101/30C02F2305/023C02F2305/10B01F31/40B01F33/831B01F33/83613B01J35/40B01J35/651B01J35/39
Inventor 苗保记张永辉陈秋玲曹燕格赵耀
Owner HENAN UNIVERSITY OF TECHNOLOGY
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