2020 Fiscal Year Final 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 Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 31020:Earth resource engineering, Energy sciences-related
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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 | Photocatalyst / oxygen evolution / Hydrogen society / Photocarrier dynamics / zirconium doping / Defect study |
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| Outline of Final Research Achievements |
We have studied BiVO4 oxygen (O2) evolution photocatalyst in aiming for the production of hydrogen, which is considered as future source of energy. In particular we have studied effect of zirconium (Zr), molybdenum (Mo) and titanium doping in BiVO4 materials on the optical properties, crystal structure and photocatalytic performance. We have confirmed that Zr is substituted on Bi site in BiVO4 enhancing n-type conductivity. Optimized doping of Zr in BiVO4 results in better performance by generating more O2 comparing to Mo-doped samples. In addition, We have confirmed and made a model for the recombination mechanism in the BiVO4 crystals. Furthermore, we have successfully used sputtering methods to fabricate Zr and Mo-doped BiVO4 thin films from a single BiVO4 target. Thus scalable production of BiVO4 in industry level should be possible for photocatalytic application.
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| Free Research Field |
Energy Materials and devices, Defect Study
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| Academic Significance and Societal Importance of the Research Achievements |
Understanding of doping mechanism of Zr in BiVO4 has academic interest for the enhancement of photo-catalytic performance. Development of BiVO4 photocatalyst will pave way to reduce dependence of carbon-di-oxide-emitting fossil fuels, and open path for the establishment of hydrogen society.
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