A facile approach for the fabrication of Au/ZnO-hollow-sphere-monolayer thin films and their photocatalytic properties

作者：Wu, Shuang; Chen, Zhiwu; Wang, Ting; Ji, Xiaohong^*

来源：Applied Surface Science, 2017, 412: 69-76.

DOI：10.1016/j.apsusc.2017.03.166

• ZnO
• Au/ZnO
• Hollow spheres
• Thin film
• Photocatalysis

In this study, we present a facile strategy for the fabrication of Au/ZnO-hollow-sphere-monolayer thin films. ZnO hollow spheres were synthesized by a template technique based on polystyrene (PS). ZnO and Au nanoparticles (NPs) were simultaneously deposited by DC magnetron sputtering. The as-prepared ZnO spheres exhibit a hollow structure with an obvious contrast between the thin ZnO shell and the interior. The Au/ZnO-hollow-sphere-monolayer thin films showed significantly enhanced photocatalytic performance in the degradation of MO compared with that of the ZnO thin film and ZnO-hollow-sphere-monolayer thin films. The observed degradation constant k of MO for the Au/ZnO-400 nm sample was 0.0415 min(-1), which is approximately 17 times that of the ZnO thin film (0.0024 min(-1)) and 3 times that of the ZnO-400 nm sample (0.0128 min(-1)). The enhancement in photocatalytic activity was attributed to the synergistic effect of the transfer of effective charges from the ZnO conduction band to the plasmonic Au NPs and the light trapping within the ZnO hollow spheres.

• 出版日期2017-8-1
• 单位华南理工大学