Enhanced photocatalytic activity of ZnS nanoparticles loaded with MoS₂ nanoflakes by self-assembly approach

다국어 초록 (Multilingual Abstract)

A hybrid consisting of ZnS nanoparticles supported on layered MoS<SUB>2</SUB>-ZnS was synthesized by a hydrothermal method based on self-assembly technique without using a template. XRD, SEM-EDX, TEM, HR-TEM, TG-DTA, XPS, N<SUB>2</SUB> adsorption-desorption, and UV-Vis spectroscopies were used to characterize the structural features, morphology, and composition of the MoS<SUB>2</SUB>-ZnS hybrid. The results show that the MoS<SUB>2</SUB>-ZnS hybrid is mainly ZnS nanoparticles on layered MoS<SUB>2</SUB> with a thickness of ca. 5-20nm. The combination of the MoS<SUB>2</SUB> and ZnS hybrid structure is beneficial for enhancing the photocatalytic degradation of rhodamine B (RhB) under visible light irradiation. A possible photoreaction mechanism of the MoS<SUB>2</SUB>-ZnS hybrid in the degradation is proposed. The photoexcited electrons from the ZnS could easily transfer to the conduction band of MoS<SUB>2</SUB>, thus decreasing the recombination of photoinduced carriers and enabling the degradation of RhB under visible light irradiation.