標題: KSCN-activation of hydrogenated NiO/TiO2 for enhanced photocatalytic hydrogen evolution
作者: Wang, Tsai-Te
Chiang, Chao-Lung
Lin, Yu-Chang
Srinivasadesikan, Venkatesan
Lin, Ming-Chang
Lin, Yan-Gu
交大名義發表
材料科學與工程學系
應用化學系
National Chiao Tung University
Department of Materials Science and Engineering
Department of Applied Chemistry
關鍵字: Hydrogenation;Hydrogen evolution;Quantum-chemical calculations;XANES/EXAFS spectra
公開日期: 1-May-2020
摘要: It was investigated the efficiency of hydrogen production from NiO-loaded TiO2 treated by methanol hydrogenation and functionalized by SCN ligand (SCN-M:(NiO/TiO2)). The effects of a p-n junction created between NiO and TiO2 were demonstrated to enhance significantly the overall photocatalytic performance. The optical and microstructural properties of SCN-M:(NiO/TiO2) were studied with ultraviolet-visible spectra (UV-Vis), photoluminescence (PL), Raman spectra, X-ray diffraction (XRD) and X-ray photoelectron spectra (XPS). The atomic and electronic configurations of SCN-M:(NiO/TiO2) were investigated with analysis of the X-ray absorption near-edge structure (XAS) in situ under irradiation with Xe lamp incorporating a filter (AM 1.5G). An effective quantum yield of 1.34% for hydrogen production was attained with SCN-M:(NiO/TiO2). Quantum-chemical calculations revealed a synergistic decrease of the band gap upon loading Ni, Ni-linked O-2 and anionic SCN-ligand binding. The optimal energy bandgap was decreased to 2.70 eV for (SCN/O-2)-3Ni@TiO2, which reasonably supported the enhancement of H-2 evolution.
URI: http://dx.doi.org/10.1016/j.apsusc.2020.145548
http://hdl.handle.net/11536/153975
ISSN: 0169-4332
DOI: 10.1016/j.apsusc.2020.145548
期刊: APPLIED SURFACE SCIENCE
Volume: 511
起始頁: 0
結束頁: 0
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