Preparation method and application of tungsten trioxide@molybdenum disulfide hollow tube composite catalyst

A technology of composite catalyst and molybdenum disulfide, 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 efficiency of visible light, achieve unique morphology, and improve the utilization rate of visible light , The effect of broadening the light response range

Active Publication Date: 2019-01-15
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem of low photocatalytic efficiency of visible light photocatalysts used in sewage purification, and provides a preparation method and application of a tungsten trioxide@molybdenum disulfide hollow tube composite catalyst

Method used

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  • Preparation method and application of tungsten trioxide@molybdenum disulfide hollow tube composite catalyst
  • Preparation method and application of tungsten trioxide@molybdenum disulfide hollow tube composite catalyst
  • Preparation method and application of tungsten trioxide@molybdenum disulfide hollow tube composite catalyst

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specific Embodiment approach 1

[0019] Embodiment 1: The preparation method of a tungsten trioxide@molybdenum disulfide hollow tube composite catalyst in this embodiment is specifically carried out according to the following steps:

[0020] 1. Dissolve sodium tungstate and sodium chloride in deionized water and stir magnetically for 10 to 20 minutes. Use HCl solution with a concentration of 3mol / L to adjust the pH to 1 to 3, and then transfer it to a polytetrafluoroethylene liner. Keep it at 160-200°C for 18-26 hours. After the reaction is completed, cool it down to room temperature naturally. Wash it with deionized water for 3-5 times and then with absolute ethanol for 3-5 times. Dry in an oven for 10-14 hours to obtain a light yellow solid that is rod-shaped WO 3 The quality of the sodium tungstate and the volume ratio of deionized water are 1g:(20~25)mL; the quality of the sodium chloride and the volume ratio of deionized water are 1g:(40~50)mL;

[0021] Second, the rod-shaped WO 3 Disperse in deionized...

specific Embodiment approach 2

[0022] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 1, an HCl solution with a concentration of 3 mol / L is used to adjust the pH to 2. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 2, the temperature is kept at 200° C. for 4 hours, and the reaction is naturally cooled to room temperature after the reaction is completed. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a preparation method and application of a tungsten trioxide@molybdenum disulfide hollow tube composite catalyst, and relates to the preparation method and the application of a composite photocatalyst. The preparation method and the application aim at solving the problem that when the existing photocatalyst is applied to sewage purification, the visible light photocatalysis efficiency is low. The method comprises the steps that 1, rodlike WO3 is prepared; 2, after the rodlike WO3 is dispersed, sodium molybdate and thiourea are added; continuous stirring is performed; then, the mixture is transferred into a polytetrafluoroethylene inner liner; under the condition that the temperature is 160 to 200 DEG C, maintenance is performed for 2 to 24h; after the reaction is completed, natural cooling is performed to room temperature; washing is performed; drying is performed in a drying box; the tungsten trioxide@molybdenum disulfide hollow tube composite catalyst is obtained. The tungsten trioxide@molybdenum disulfide hollow tube composite catalyst is used for deeply purifying organic dye water bodies.

Description

technical field [0001] The invention relates to a preparation method and application of a composite photocatalyst. Background technique [0002] Environmental pollution restricts the sustainable development of human society, and the degradation of organic pollutants in water is still an urgent problem to be solved. The semiconductor photocatalytic oxidation technology has the advantages of mild reaction conditions, easy preparation of catalysts, and no secondary pollution. It is an effective way to solve environmental pollution problems. At present, developing photocatalysts with high-efficiency visible light response and improving photon quantum efficiency has become a key topic in the field of photocatalysis. [0003] With the rise of the research boom of two-dimensional materials such as graphene, MoS 2 research has also attracted widespread attention. MoS 2 The layers are maintained by relatively weak van der Waals forces, so they exhibit many excellent properties. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J35/02C02F1/30C02F101/30
CPCB01J27/051B01J35/004B01J35/02C02F1/30C02F2101/308
Inventor 于洪文曾影
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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