Promoting photocatalytic hydrogen production by core-shell CdS@MoOx photocatalyst connected by S-Mo “bridge”
A CdS@MoOx core-shell nanorod photocatalyst constructed by a one-step in situ photodeposition method, which masterly utilizes the photoproduction-hole-induced dehydration and condensation of Mo-O-H derived from the hydrolyzed product of MoCl5, to successfully deposit a layer of MoOx on the surface of CdS NRs. X-ray photoelectron spectroscopy further confirmed that S-Mo bond serves as a bridges for carrier transport between the core and the shell, which significantly reducing interface impedance and improving carrier transmission efficiency. Due to the superior interfacial carriers separation as well as the enhanced light absorption, the optimal CdS@MoOx-0.9 nanocomposite exhibits high hydrogen production performance(5.42 mmol·g-1·h-1) under visible light irradiation (λ > 400 nm). We have experimentally shed light on the mechanism of this excellent enhancement performance in detail. Moreover, our work can broaden the range of the construction and the application of developing other photocatalytic material containing transition metal oxide.