TiO2 Film/Cu2O Microgrid Heterojunction with Photocatalytic Activity under Solar Light Irradiation

作者：Junying Zhang, Hailing Zhu, Shukai Zheng, Feng Pan, Tianmin Wang · 发表于：ACS Applied Materials & Interfaces · 年份：2009 · DOI：10.1021/am900463g · 被引用次数：100 · 研究领域：Advanced Photocatalysis Techniques、Copper-based nanomaterials and applications、TiO2 Photocatalysis and Solar Cells

Coupling a narrow-band-gap semiconductor with TiO(2) is an effective method to produce photocatalysts that work under UV-vis light irradiation. Usually photocatalytic coupled-semiconductors exist mainly as powders, and photocatalytic activity is only favored when a small loading amount of narrow-band-gap semiconductor is used. Here we propose a heavy-loading photocatalyst configuration in which 51% of the surface of the TiO(2) film is covered by a Cu(2)O microgrid. The coupled system shows higher photocatalytic activity under solar light irradiation than TiO(2) and Cu(2)O films. This improved performance is due to the efficient charge transfer between the two phases and the similar opportunity each has to be exposed to irradiation and adsorbates.