|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications V
||Binary Titanium Alloys as Templates for Co-doping Titanium Oxide Photocatalysts
||J. Shang, Zhengchao Xu, Qi Li
|On-Site Speaker (Planned)
Doping is widely used to control the bandgap and photocatalytic efficiency of semiconductor photocatalysts in energy and environment applications. While wet chemistry methods have been extensively used to synthesize TiO2 photocatalysts with either cationic or anionic dopants because of their simplicity and versatility, cationic and anionic co-doping of TiO2 remains a challenge. Here we explore the synthesis of TiO2 photocatalysts co-doped with transition metal elements and with N and C, in nanotube arrays by templating on binary titanium alloys with Nb, Mo, and Ni. Results indicated that Nb, Mo and Ni were doped into TiO2 crystal lattice by substituting Ti4+ with Nb5+, Mo6+ and Ni2+, respectively. Doing with Nb5+ and Mo6+ did not influence the crystal structure of TiO2, but Ni2+ doping promoted phase transformation of TiO2 from anatase to rutile. Further anionic doping by N and C resulted in significant improvement of the visible-light photocatalytic efficiency of TiO2.
||Planned: Supplemental Proceedings volume