Jia Junjun, Taniyama Kenta, Imura Masaaki, Kanai Toshimasa, Shigesato Yuzo
Graduate School of Science and Engineering, Aoyama Gakuin University, 5-10-1, Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan.
Phys Chem Chem Phys. 2017 Jul 14;19(26):17342-17348. doi: 10.1039/c7cp03291a. Epub 2017 Jun 26.
Sputter-deposited TiO films with high visible-light photocatalytic activity were successfully realized by a hybrid TiO/Pt/WO film structure with Pt nanoparticles uniformly distributed at the interface of the TiO and WO films. The TiO/Pt/WO hybrid films enable the complete decomposition of CHCHO under visible-light irradiation. The water contact angle of the TiO/Pt/WO hybrid films reaches below 5° under visible-light irradiation. Pt nanoparticles are considered to act as a cocatalyst to improve the electron-hole separation efficiency. We demonstrate that the photogenerated holes in WO are transferred to the surface of the TiO film with less hole-trapping and induce high visible-light photocatalytic activity and hydrophilic behavior, and the photogenerated electrons are accumulated in the Pt nanoparticles. The highly hydrophilic thin films with high visible-light photocatalytic activity can be applied to various indoor products possessing self-cleaning and antifogging properties.
通过具有均匀分布在TiO和WO薄膜界面处的Pt纳米颗粒的TiO/Pt/WO薄膜结构，成功实现了具有高可见光光催化活性的溅射沉积TiO薄膜。TiO/Pt/WO混合薄膜能够在可见光照射下使CHCHO完全分解。在可见光照射下，TiO/Pt/WO混合薄膜的水接触角降至5°以下。Pt纳米颗粒被认为作为助催化剂提高了电子-空穴分离效率。我们证明，WO中的光生空穴以较少的空穴捕获转移到TiO薄膜表面，并诱导出高可见光光催化活性和亲水行为，而光生电子则积累在Pt纳米颗粒中。具有高可见光光催化活性的高亲水性薄膜可应用于具有自清洁和防雾性能的各种室内产品。
