The construction of three-dimensional CdIn2S4/MoS2 composite materials for efficient hydrogen production

In this study, CdIn 2 S 4 /MoS 2 composite structure was prepared by a simple two-step hydrothermal synthesis method, and the CdIn 2 S 4 /MoS 2 composite structure samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectroscopy (UV–vis). Due to the effective loading of MoS 2 on the surface of CdIn 2 S 4 particles, the photocatalytic performance of CdIn 2 S 4 /MoS 2 composite material is significantly improved under visible light irradiation (λ = 420 nm), which indicating the effective inhibit the recombination of photogenerated electron holes . Meanwhile, the visible light response of CdIn 2 S 4 is increased and the life of photoexcitation carrier is prolonged. The CdIn 2 S 4 /MoS 2 (sample 2CM) composite sample with mole content of 9% has the highest catalytic hydrogen production activity, and its hydrogen production rate is 293 μmol h −1 g −1 , which is more than 3 times that of sample C. After 4 cycles of photocatalytic experiments, the photocatalytic activity is still stable, and the XRD diffraction peak does not appear obvious shift, which provides a new way for the design and preparation of efficient and stable photocatalytic materials.