Highly flexible transparent substrate-free photoanodes using ZnO nanowires on nickel microfibers
- Authors
- Jo, Hong Seok; Samuel, Edmund; Kwon, Hyuk-Jin; Joshi, Bhavana; Kim, Min-Woo; Kim, Tae-Gun; Swihart, Mark T.; Yoon, Sam S.
- Issue Date
- 1-5월-2019
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- ZnO; Nanowires; Nickel; Microfibers; Flexible; Transparent; Substrate-free; Photoanode
- Citation
- CHEMICAL ENGINEERING JOURNAL, v.363, pp.13 - 22
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMICAL ENGINEERING JOURNAL
- Volume
- 363
- Start Page
- 13
- End Page
- 22
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/65469
- DOI
- 10.1016/j.cej.2019.01.099
- ISSN
- 1385-8947
- Abstract
- We demonstrate impressive performance of photoanodes comprising ZnO nanowires grown over nickel fibers for efficient water splitting. The photoanode is substrate-free and flexible, exhibiting excellent stability (similar to 98%) in photocurrent density even after 1000 bending cycles. The hierarchically structured ZnO nanowires on nickel microfibers synergistically provide many accessible electrochemical sites and enhance the photocurrent density to 1.14mA/cm(2) at a voltage of 0.4V vs. Ag/AgCl. The one- and two-dimensional structures of the ZnO nanowires over nickel microfibers enable an efficient charge-transport mechanism that supports high light-harvesting efficiency. Scanning and transmission electron microscopy are used to study the morphologies of the samples in detail, while X-ray diffraction confirms the metallic state of Ni and the crystallinity of ZnO.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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