title: A Novel Green TiO2Photocatalyst with a Surface Charge-Transfer Complex of Ti and Hydrazine Groups.
abstract: The optical property of TiO2plays an important role in its various and promising photocatalytic applications. Previous efforts in improving its optical properties include doping with various metal and/or non-metal elements, coupling with other colorful semiconductors or molecules, and hydrogenating to crystalline/disordered core/shell nanostructures. Here, we report a beautiful green TiO2achieved by forming the charge-transfer complex of colorless hydrazine groups and surface Ti4+, which extends the optical absorption into the near infrared region (≈1100 nm, 1.05 eV). It shows an enhanced photocatalytic performance in hydrogen generation under simulated sunlight, and degradation of organic pollution under visible light due to an impurity state (about 0.28 eV) resulting in fast electron-hole separation and injection of electrons from the ligand to the conduction band of TiO2. This study demonstrates an alternative approach to tune the optical, impurity state and photocatalytic properties of TiO2nanoparticles and we believe this will spur a wide interest in related materials and applications.
authors.affiliation: Department of Chemistry, University of Missouri-Kansas City, Kansas City, Missouri, 64110, USA.|Department Hubei Collaborative Innovation Center for Advanced Organochemical Materials, Ministry of Education Key Laboratory for the Synthesis and Applications of Organic Functional Molecules, Hubei University, Wuhan, 430062, P. R. China.
authors.forename: Lihong
authors.initials: L
authors.lastname: Tian
authors.affiliation: State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, P. R. China.
authors.forename: Jilian
authors.initials: J
authors.lastname: Xu
authors.affiliation: Department of Chemistry, University of Missouri-Kansas City, Kansas City, Missouri, 64110, USA.
authors.forename: Abrar
authors.initials: A
authors.lastname: Alnafisah
authors.affiliation: Department Hubei Collaborative Innovation Center for Advanced Organochemical Materials, Ministry of Education Key Laboratory for the Synthesis and Applications of Organic Functional Molecules, Hubei University, Wuhan, 430062, P. R. China.
authors.forename: Ran
authors.initials: R
authors.lastname: Wang
authors.affiliation: College of Science, China Three Gorges University, Yichang, 443002, P. R. China.
authors.forename: Xinyu
authors.initials: X
authors.lastname: Tan
authors.affiliation: Department of Chemistry, University of Missouri-Kansas City, Kansas City, Missouri, 64110, USA.
authors.forename: Nathan A
authors.initials: NA
authors.lastname: Oyler
authors.affiliation: State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, P. R. China.
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.affiliation: Department of Chemistry, University of Missouri-Kansas City, Kansas City, Missouri, 64110, USA.
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Chen
keywords: charge-transfer; hydrazine; hydrogen evolution; photocatalysis; titanium dioxide