Deposition of CdS nanoparticles within free-standing both-side-open stretched TiO2 nanotube-array films for the enhancement of photoelectrochemical performance

作者：Liou Ya Hsuan; Kao Li Cheng; Tsai Meng Che; Lin Chin Jung^*

来源：Electrochemistry Communications, 2012, 15(1): 66-69.

DOI：10.1016/j.elecom.2011.11.029

• TiO2
• Nanotube
• CdS
• Photoelectrochemical

A heterojunction CdS/TiO2 photoelectrode was prepared using pre-crystallized annealing, followed by solution-based methods, to deposit CdS within the tubes of a free-standing both-side-open TiO2 nanotube-array (TiNT) film. Such open-ended structures make the nanochannels more amenable to CdS deposition compared with close-ended structures, thus preventing entry clogging. In the experiment on photoelectrochemical (PEC) cells, the use of CdS/both-side-open TiNT film allows easy access of the outer light and the electrolyte to the nanochannels because of the uniform CdS deposition within the tubes. As compared to the one-side-close TiNT-based PEC cell, the maximum incident-photon-to-current conversion efficiency at 455 nm is increased from 41% to 68% in the both-side-open TiNT-based device measured at a potential of 0.4 V versus Ag/AgCl under front-side illumination.

• 出版日期2012-2