Band alignment of ZnO-based nanorod arrays for enhanced visible light photocatalytic performance.

A ternary semiconductor ZnO/MoS/AgS nanorod array in an intimate core-shell structure was synthesized on glass substrates. The physicochemical properties and photocatalytical performance of the specimen were characterized and compared with single ZnO and binary ZnO/AgS and ZnO/MoS nanorod arrays. It is found that the coating layers depressed the band edge emission of the ZnO core, improved light absorption in the visible range, reduced charge transfer resistance, and increased photocatalytic activity.