FABRICATION OF CdS/ZnO CORE-SHELL NANOFIBERS BY ELECTROSPINNING AND THEIR PHOTOCATALYTIC ACTIVITY

摘要

Electrospinning has been proved to be a versatile and effective method for manufacturing micro-scale to nano-scale fibers continuously. In this article, CdS/ZnO core/shell nanofibers were prepared successfully by the typical single-nozzle electrospinning, with subsequent simple thermal decomposition. The SEM and TEM results indicated that core-shell fibers with a diameter of 200-350 nm and shell thickness of 50nm were obtained when PVP/zinc acetate/cadmium acetate/thiocarbamide composite nanofibers were calcined at 480 ℃ for 4h . The EDS analysis results showed that the core fiber is CdS and the shell layer is ZnO. Hydrogen evolution measurements from photocatalytic water splitting using the ZnO/CdS core-shell nanofibers as photocatalyst were carried out. The ZnO/CdS core-shell nanofibers demonstrate a much higher ability for H_2 evolution than that of sole CdS or ZnO. The highest H_2 evolution rate was up to 354 μmolh~(-1)g~(-1).