Key Words:QUANTUM DOTS; COMPOSITE; HETEROSTRUCTURE; DEGRADATION; ENERGY

Abstract:With respect to solid-solution photocatalysts for water splitting, researchers have focused on improving the loading and stability of catalysts, which have been major concerns and research interests. Herein, the fabrication of Zn0.5Cd0.5S/MoS2 0.5 Cd 0.5 S/MoS 2 nanocomposites involved a two-step method that encompassed hydrothermal synthesis and physical mixing. Experimental results confirmed that the Zn0.5Cd0.5S/MoS2 0.5 Cd 0.5 S/MoS 2 nanocomposites exhibited outstanding photocatalytic performance. In particular, they exhibited a notable hydrogen precipitation rate of 19.41 mmol/(g*h). The hydrogen production performance of Zn0.5Cd0.5S/MoS2 0.5 Cd 0.5 S/MoS 2 was approximately nine times greater than that of pure Zn0.5Cd0.5S, 0.5 Cd 0.5 S, indicating a considerable increase. The observed enhancement in photo- catalytic efficiency can be attributed to the formation of a p-n heterojunction between Zn 0.5 Cd 0.5 S and MoS2. 2 . This particular junction helped in separating and migrating photoinduced charge carriers, ultimately improving the photocatalytic performance. Furthermore, the addition of excess thiourea in MoS2 2 preparation produced Mo-O defects and increased the layer spacing of the involved material, improving the electron transfer and visible-light utilization of the material. The inhibition of carrier recombination was beneficial for synthesizing efficient and long-lasting photocatalysts.

Volume:227

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Translation or Not:no