8.3.3 UV Assisted Chemical Gas Sensing of Nanoporous TiO2 at Low Temperature

Lipeng Liu, Xiaogan Li, Xiaoying Wang, Jun Yu, Zhenan Tang, Jing Wang, Shiwei Li & Jinjun Liao
Nanoporous TiO2 powders were prepared following a two-step method. The highly ordered uniform TiO2 nanotube arrays were first grown by the electrochemical anodization of a Ti metal sheet and subsequently, mechanically milled to obtain the porous TiO2. The obtained nanoporous TiO2 sample contains nanotube-like particles with a length around 400 nm and inner diameter ~100 nm and also some near-spherical TiO2 single crystals with a diameter around 10 nm. The sensing properties of assynthesized nanoporous...