Applied Surface Science, Vol.363, 154-160, 2016
CdS nanoparticles/CeO2 nanorods composite with high-efficiency visible-light-driven photocatalytic activity
Different mole ratios of CdS nanoparticles (NPs)/CeO2 nanorods (NRs) composites with effective contacts were synthesized through a two-step hydrothermal method. The crystal phase, microstructure, optical absorption properties, electrochemical properties and photocatalytic H-2 production activity of these composites were investigated. It was concluded that the photogenerated charge carriers in the CdS NPs/CeO2 NRs composite with a proper mole ratio (1:1) exhibited the longest lifetime and highest separation efficiency, which was responsible for the highest H-2-production rate of 8.4 mmol h(-1) g(-1) under visible-light irradiation (lambda > 420 nm). The superior photocatalytic H-2 evolution properties are attributed to the transfer of visible-excited electrons of CdS NPs to CeO2 NRs, which can effectively extend the light absorption range of wide-band gap CeO2 NRs. This work provides feasible routes to develop visible-light responsive CeO2-based nanomaterial for efficient solar utilization. (C) 2015 Elsevier B.V. All rights reserved.