title: Preparation of the TiO2/Graphic Carbon Nitride Core-Shell Array as a Photoanode for Efficient Photoelectrochemical Water Splitting.
abstract: The photoelectrochemical (PEC) oxygen evolution reaction over a photoanode is a promising process for renewable energy. The fascinating properties of graphic carbon nitride (g-CN) in water splitting make the photoelectrode engineering of it for PEC use quite meaningful. In this work, we report the fabrication of the core-shell-structured TiO2/g-CN composite film by hydrothermal growth for TiO2nanorod arrays and solvothermal growth for the g-CN layer. Herein, TiO2is used as an effective electron-transfer layer, and g-CN is used as a visible light absorption layer. Different reaction conditions were investigated in order to obtain the uniform TiO2/g-CN nanorod core-shell structure. Outstanding photoelectrochemical performances of the optimized composites were obtained compared to that of pristine TiO2or g-CN because the high-quality heterojunction between g-CN and TiO2turned out to effectively reduce the recombination of charge carriers and improve the photoelectric conversion ability. Thus, the photocurrent density under visible light of TiO2/g-CN reached 80.9 μA cm-2, which is 21 times that of g-CN under 0.6 V (vs SCE). Finally, a systematic photoelectrocatalytic mechanism of charge carrier migration and the recombination path in the TiO2/g-CN nanorod core-shell heterojunction was proposed, which can be considered to be a probable explanation of efficient PEC performance.
authors.affiliation: College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics , 210016 Nanjing, PR China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Fan
authors.affiliation: College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics , 210016 Nanjing, PR China.
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.affiliation: College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics , 210016 Nanjing, PR China.
authors.forename: Bin
authors.initials: B
authors.lastname: Gao
authors.affiliation: College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics , 210016 Nanjing, PR China.
authors.forename: Hao
authors.initials: H
authors.lastname: Gong
authors.affiliation: College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics , 210016 Nanjing, PR China.
authors.forename: Hairong
authors.initials: H
authors.lastname: Xue
authors.affiliation: College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics , 210016 Nanjing, PR China.
authors.forename: Hu
authors.initials: H
authors.lastname: Guo
authors.affiliation: College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics , 210016 Nanjing, PR China.
authors.forename: Li
authors.initials: L
authors.lastname: Song
authors.affiliation: College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics , 210016 Nanjing, PR China.
authors.forename: Wei
authors.initials: W
authors.lastname: Xia
authors.affiliation: College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics , 210016 Nanjing, PR China.
authors.forename: Xianli
authors.initials: X
authors.lastname: Huang
authors.affiliation: College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics , 210016 Nanjing, PR China.
authors.forename: Jianping
authors.identifier: 0000-0001-7525-2809
authors.initials: J
authors.lastname: He