One-step Sublimation and Epitaxial Growth of CdS-Cd Heterogeneous Nanoparticles on S-doped MoO2 Nanosheets for Efficient Visible Light-Driven Photocatalytic H2 Generation.

As a green, pollution-free and renewable clean energy source, photocatalytic H2 production has attracted great attention. Here, epitaxial growth of pyramidal CdS-Cd nanoparticles on S-doped MoO2 nanosheets (CdS-Cd/S-MoO2) were prepared by one-step co-sublimation of CdS and MoO3. The photogenerated electrons of CdS as photocatalyst are transferred to Cd and S-MoO2 as co-catalyst for photocatalytic H2 production, which is observed from surface photovoltage (SPV) under visible light irradiation. At last, the obtained CdS-Cd/S-MoO2 presented an efficient photocatalytic performance under the visible light (>420 nm) with a prominent H2 generation rate of as high as 24.98 µmol h-1 mg-1, which is eleven times higher than that of the CdS-Cd nanoparticles (2.26 µmol h-1 mg-1) and it is superior than that of the CdS (1.51 µmol h-1 mg-1).