KSCN-activation of hydrogenated NiO/TiO2 for enhanced photocatalytic hydrogen evolution

Tsai Te Wang; Chao Lung Chiang; Yu Chang Lin; Venkatesan Srinivasadesikan; Ming Chang Lin; Yan Gu Lin

doi:10.1016/j.apsusc.2020.145548

KSCN-activation of hydrogenated NiO/TiO₂ for enhanced photocatalytic hydrogen evolution

Tsai Te Wang, Chao Lung Chiang, Yu Chang Lin, Venkatesan Srinivasadesikan, Ming Chang Lin^*, Yan Gu Lin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

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 O₂ and anionic SCN-ligand binding. The optimal energy bandgap was decreased to 2.70 eV for (SCN/O₂)-3Ni@TiO₂, which reasonably supported the enhancement of H₂ evolution.

Original language	English
Article number	145548
Journal	Applied Surface Science
Volume	511
DOIs	https://doi.org/10.1016/j.apsusc.2020.145548
State	Published - 1 May 2020

Keywords

Hydrogen evolution
Hydrogenation
Quantum-chemical calculations
XANES/EXAFS spectra

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Cite this

@article{4d0e7158a5614098af1853df0716d301,

title = "KSCN-activation of hydrogenated NiO/TiO2 for enhanced photocatalytic hydrogen evolution",

abstract = "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 O2 and anionic SCN-ligand binding. The optimal energy bandgap was decreased to 2.70 eV for (SCN/O2)-3Ni@TiO2, which reasonably supported the enhancement of H2 evolution.",

keywords = "Hydrogen evolution, Hydrogenation, Quantum-chemical calculations, XANES/EXAFS spectra",

author = "Wang, {Tsai Te} and Chiang, {Chao Lung} and Lin, {Yu Chang} and Venkatesan Srinivasadesikan and Lin, {Ming Chang} and Lin, {Yan Gu}",

year = "2020",

month = may,

day = "1",

doi = "10.1016/j.apsusc.2020.145548",

language = "English",

volume = "511",

journal = "Applied Surface Science",

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T1 - KSCN-activation of hydrogenated NiO/TiO2 for enhanced photocatalytic hydrogen evolution

AU - Wang, Tsai Te

AU - Chiang, Chao Lung

AU - Lin, Yu Chang

AU - Srinivasadesikan, Venkatesan

AU - Lin, Ming Chang

AU - Lin, Yan Gu

PY - 2020/5/1

Y1 - 2020/5/1

N2 - 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 O2 and anionic SCN-ligand binding. The optimal energy bandgap was decreased to 2.70 eV for (SCN/O2)-3Ni@TiO2, which reasonably supported the enhancement of H2 evolution.

AB - 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 O2 and anionic SCN-ligand binding. The optimal energy bandgap was decreased to 2.70 eV for (SCN/O2)-3Ni@TiO2, which reasonably supported the enhancement of H2 evolution.

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KW - Hydrogenation

KW - Quantum-chemical calculations

KW - XANES/EXAFS spectra

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