Preparation method of ZnO/MoS2 nanosheet compound photocatalyst

A photocatalyst and nanosheet technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of rapid decay of photocatalytic performance and reduction of photocatalytic performance, and achieve significant photocatalytic performance. The effect of performance, simple preparation method and high utilization rate

Inactive Publication Date: 2017-02-15
NANCHANG HANGKONG UNIVERSITY
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  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its less photogenerated electron-hole pairs, its photocatalytic performance decays rapidly
Zinc oxide is a very mature photocatalyst with high photocatalytic performance and a large number of photogenerated electron-hole pairs on the surface, which can provide a large number of individual electrons and holes for molybdenum disulfide, but its photogenerated electron-hole pairs The recombination speed is much greater than the electron transfer speed, resulting in the reduction of photocatalytic performance

Method used

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  • Preparation method of ZnO/MoS2 nanosheet compound photocatalyst
  • Preparation method of ZnO/MoS2 nanosheet compound photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0024] In beaker A and beaker B, measure 6mL dehydrated ethanol and 7mL deionized water mixing forming agent respectively, then weigh 2mmol zinc nitrate hexahydrate (Zn(NO 3 ) 2 •6H 2 O) and 0.2mmol sodium lauryl sulfate were added to beaker A, placed on a magnetic stirrer and stirred evenly; then weighed 2mmol urea (NH 2 CONH 2 ) into beaker B, and also placed on a magnetic stirrer to stir evenly; then add the solution in beaker B to beaker A drop by drop and keep stirring, then pour the solution in beaker A into 50mL Teflon-lined In a stainless steel autoclave, the autoclave was placed in a 100°C electric blast drying oven for 6 hours, after which the autoclave was naturally cooled to room temperature. Impurities were then removed by centrifugal washing with absolute ethanol and distilled water. Finally, the precipitated product after centrifugation was dried in a vacuum drying oven at 60°C for 12 hours; after that, it was calcined in a box-type resistance furnace at 400...

Embodiment 2

[0027] Take by weighing 100mg sodium molybdate dihydrate and 200mg thioacetamide and add in 100mL beaker A; Get the zinc oxide nanosheet 6mg prepared in example 1, ZnO / MoS 2 Add ZnO to A at a doping ratio of 10% to form B; add 50% deionized water to B and stir on a magnetic stirrer to form C; pour the evenly stirred solution C into the reactor; put the reactor into the electric heating Raise the temperature in a blast drying oven, set the temperature to 220°C, and heat up for 24 hours; after the reaction is over, wait for the reaction kettle to reach room temperature naturally, and then centrifuge 2-3 times with deionized water; centrifuge the precipitate in step 6 Put it in the refrigerator for freezing to freeze the deionized water; put the frozen solid in a freeze dryer for freeze-drying to obtain 10% ZnO / MoS 2 nanosheet composites.

Embodiment 3

[0029] Weigh 100mg of sodium molybdate dihydrate and 200mg of thioacetamide into 100mL beaker A; take 3mg of zinc oxide nanosheets prepared in Example 1, first grind ZnO, and then ZnO and MoS 2 Weigh ZnO at 5% and add it to A to form B; add 50ml deionized water to B and stir on a magnetic stirrer to form C; pour the evenly stirred solution C into the reaction kettle; put the reaction kettle into the electric heating drum Heat up in an air drying oven, set the temperature to 220°C, and heat up for 24 hours; after the reaction is over, wait for the reaction kettle to reach room temperature naturally, and then centrifuge 2-3 times with deionized water; put the centrifuged sediment into the refrigerator Freezing is performed to freeze deionized water; the frozen solid is placed in a freeze dryer for freeze drying to obtain 5% ZnO / MoS 2 Nanosheets.

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Abstract

The invention relates to a preparation method of a ZnO/MoS2 nanosheet compound photocatalyst. The photocatalyst with low price and high efficiency is obtained by doping a small amount of zinc oxide into molybdenum disulfide; specifically the photocatalyst is prepared by reacting the zinc oxide, sodium molybdate dehydrate and thioacetamide through a hydrothermal method. The ZnO /MoS2 nanosheet compound in the invention can quickly degrade organic pollutants, particularly dye organic pollutes, in waste water into non-pollution substances such as H2O and CO2 under normal temperature, normal pressure and illumination, and the ZnO/MoS2 nanosheet compound has lasting photocatalytic activity.

Description

technical field [0001] The present invention relates to a kind of ZnO / MoS 2 The invention relates to a method for preparing a nanosheet composite photocatalyst, specifically belonging to the technical field of photocatalysts. Background technique [0002] In the environment, water pollution is one of the main pollutions in the environment, especially the organic matter pollution in water bodies. Organic pollutants have high toxicity, high environmental release rate, and wide impact. Due to their wide variety and considerable production and use, they have brought great harm to human health and the environment. Organic pollutants have caused soil quality to decline, water quality to be polluted, food pollutant residues to exceed the standard, and have brought great damage to the environment. The main sources of water pollution in my country are industrial wastewater, agricultural wastewater and urban domestic sewage, and the main pollutants in these wastewater are soluble or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C02F1/30C02F101/38
CPCY02W10/37B01J27/051B01J35/004B01J35/023C02F1/30C02F2101/38C02F2305/10
Inventor 谢宇宋健华刘玉应凌云
Owner NANCHANG HANGKONG UNIVERSITY
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