title: Black N/H-TiO2Nanoplates with a Flower-Like Hierarchical Architecture for Photocatalytic Hydrogen Evolution.
abstract: A facile two-step strategy was used to prepare black of hydrogenated/nitrogen-doped TiO2nanoplates (NHTA) with a flower-like hierarchical architecture. In situ nitriding and self-assembly was realized by hydrothermal synthesis using tripolycyanamide as a N source and as a structure-directing agent. After thorough characterization, it was found that the hydrogenation treatment did not damage the flower-like architecture but distorted the anatase crystal structure and significantly changed the band structure of NHTA owing to the increased concentration of oxygen vacancies, hydroxyl groups, and Ti3+cations. Under AM 1.5 illumination, the photocatalytic H2evolution rate on the black NHTA was approximately 1500 μmol g-1h-1, which was much better than the N-doped TiO2nanoplates (≈690 μmol g-1h-1). This improvement in the hydrogen evolution rate was attributed to a reduced bandgap, enhanced separation of the photogenerated charge carriers, and an increase in the surface-active sites.
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, PR China.
authors.forename: Kaifu
authors.initials: K
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, PR China. zwchem@hotmail.com.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhou
authors.affiliation: Faculty of Engineering and the Environment, University of Southampton, Southampton, SO17 1BJ, United Kingdom.
authors.forename: Lina
authors.initials: L
authors.lastname: Chi
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, PR China.
authors.forename: Xiangcheng
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, PR China.
authors.forename: Weiyao
authors.initials: W
authors.lastname: Hu
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, PR China.
authors.forename: Baojiang
authors.initials: B
authors.lastname: Jiang
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, PR China.
authors.forename: Kai
authors.initials: K
authors.lastname: Pan
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, PR China.
authors.forename: Guohui
authors.initials: G
authors.lastname: Tian
authors.affiliation: Faculty of Engineering and the Environment, University of Southampton, Southampton, SO17 1BJ, United Kingdom. z.jiang@soton.ac.uk.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Jiang
mesh_terms: D002384:Catalysis; D004578:Electron Spin Resonance Spectroscopy; D006859:Hydrogen / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry*; D055668:Photochemical Processes; D013056:Spectrophotometry, Ultraviolet; D013059:Spectrum Analysis, Raman; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: C009495:titanium dioxide; D006859:Hydrogen; D014025:Titanium; D009584:Nitrogen
keywords: black TiO2; doping; hierarchical architecture; nanoplates; photocatalytic hydrogen evolution