2020 Fiscal Year Annual Research Report
Study of group-IVB metal doped BiVO4 thin-films for development of a highly efficient Z-Scheme photocatalyst
| Project/Area Number |
18K05010
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| Research Institution | University of Tsukuba |
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Principal Investigator |
ISLAM MONIRUL 筑波大学, 数理物質系, 助教 (30739719)
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| Co-Investigator(Kenkyū-buntansha) |
櫻井 岳暁 筑波大学, 数理物質系, 准教授 (00344870)
池田 茂 甲南大学, 理工学部, 教授 (40312417)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Keywords | Bismuth Valadium Oxide / Electronic Structure / Dopant-mechanism / Photocatalytic activity / sputtering |
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| Outline of Annual Research Achievements |
1) We have done Monte Carlo simulation to study effect of RF Power on the ratio of Bi and V in BiVO4 Films Sputtered from single target. BiVO4 films with monoclinic scheelite crystal structures were obtained at high RF power and found to exhibit comparable photocatalytic performances.
2) Effect of zirconium (Zr), titanium, and sulphur doping in sputtered BiVO4 films were investigated studying structural and optical properties using XRD, TRPL and finally photocatalytic performance.
3) Mechanism of Zr incorporation into BiVO4 materials were investigated by studying local structure surrounding Zr in BiVO4 host crystal using Extended X-ray absorption fine structure (EXAFS).EXAFS revealed an 8-coordinated Zr4+ dodecahedral environment, suggesting that Zr is incorporated as a substitute on the Bi site and act as shallow donor.
4) Raman and XRD confirmed BiVO4 retain single-phase monoclinic crystals at lower Zr concentrations and improve performance.
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