| 학회 |
한국공업화학회 |
| 학술대회 |
2015년 가을 (11/04 ~ 11/06, 제주국제컨벤션센터(ICCJEJU)) |
| 권호 |
19권 2호 |
| 발표분야 |
(국제협력) 우수 외국인 연구자 세션(Special Session for Outstanding Foreign Researchers Resident in Korea) |
| 제목 |
Metal oxide top layer as an interfacial promoter on a ZnIn2S4/TiO2 heterostructure photoanode for enhanced photoelectrochemical performance |
| 초록 |
We designed metal oxide-coated ZnIn2S4/TiO2 (ZT) heterostructure photoanodes for enhanced photoelectrochemical performance, via hydrothermal and dip-coating methods. The effects of thin metal oxide coating layers such as TiO2, Al2O3, and SiO2, on the structural, morphological, optical, and photoelectrocatalytic activity of ZT photoanodes were investigated in detail. The metal oxide coating layers significantly enhanced the photoelectrochemical performance of ZT in the order: SiO2/ZT ＞ Al2O3/ZT ＞ TiO2/ZT ＞ ZT, at pH 11.5 under simulated one sun illumination. A two-fold boost in the photocurrent density of ZT was recorded after a surface coating of a thin SiO2 layer among the studied metal oxide layers. The charge transfer resistance measured from the electrochemical impedance spectroscopy (EIS) analysis was less for the SiO2/ZT photoanode, indicating enhanced charge separation between the oxide surface layer and electrolyte. The enhanced photoelectrochemical performance due to the thin SiO2 coating was attributed to the improved interface properties that led to the effective charge transfer processes in the vicinity of the electrolyte. |
| 저자 |
Jum Suk Jang1, Min Cho2, Pravin S. Shinde3, MAHADIK MAHADEO ABASAHEB4
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| 소속 |
1Division of Biotechnology, 2Advanced Institute of Environmental and Bioscience, 3College of Environmental and Bioresource Sciences, 4Chonbuk National Univ. |
| 키워드 |
Metal oxide; ZnIn2S4 nanosheet; TiO2 nanorod; Hydrogen production; Heterostructure photoanode
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| E-Mail |
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