Preparation method and an application of Cd/CdS heterojunction visible light photocatalyst rich in sulfur vacancies
A photocatalyst and heterojunction technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. Catalytic properties, limited CdS photocatalyst application research and other issues, to achieve excellent visible light photocatalytic performance, high light absorption and visible light catalytic efficiency, close contact effect
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[0023] Preparation of CdS precursor:
[0024] Add cadmium nitrate tetrahydrate and thiourea into a polytetrafluoroethylene reactor at a molar ratio of 1:3, add ethylenediamine to 60% of the volume of the reactor, stir magnetically until completely dissolved, and react at 200°C for 24 hours , the resulting product was naturally cooled to room temperature, washed four times with deionized water and ethanol respectively, the precipitate was collected by centrifugation, and dried in vacuum to obtain the CdS precursor.
Embodiment 1
[0026] Put 500mg of the prepared CdS in a muffle furnace for heat treatment at 400°C for 1h to obtain the intermediate CdO / CdS composite material, slowly add it to 50mL 1mol / L NaBH 4 solution, stirred at room temperature for 4 hours, filtered, washed and dried to obtain a Cd / CdS heterojunction visible photocatalyst rich in sulfur vacancies, labeled as Cd-CdS-1h.
Embodiment 2
[0028] Put 500mg of the prepared CdS in a muffle furnace for heat treatment at 400°C for 2h to obtain the intermediate CdO / CdS composite material, slowly add it to 50mL 1mol / L NaBH 4 solution, stirred at room temperature for 4 hours, filtered, washed and dried to obtain a Cd / CdS heterojunction visible photocatalyst rich in sulfur vacancies, labeled as Cd-CdS-2h.
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