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Jeong, Hu Young
UNIST Central Research Facilities (UCRF)
Research Interests
  • Soft material characterization such as graphene using a low kV Cs-corrected TEM

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Three Birds, One-Stone Strategy for Hybrid Microwave Synthesis of Ta and Sn Codoped Fe2O3@FeTaO4 Nanorods for Photo-Electrochemical Water Oxidation

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Title
Three Birds, One-Stone Strategy for Hybrid Microwave Synthesis of Ta and Sn Codoped Fe2O3@FeTaO4 Nanorods for Photo-Electrochemical Water Oxidation
Author
Zhang, HeminNoh, Woo YeongLi, FengKim, Jin HyunJeong, Hu YoungLee, Jae Sung
Issue Date
2019-03
Publisher
Wiley-VCH Verlag
Citation
ADVANCED FUNCTIONAL MATERIALS, v.29, no.11, pp.1805737
Abstract
A “three birds, one stone” strategy is proposed to enhance the performance of hematite photoanode for photoelectrochemical water splitting. One-pot hybrid microwave synthesis of Ta and Sn codoped Fe2O3@FeTaO4 core–shell nanorods on F:SnO2 substrate achieves three synergetic effects simultaneously: i) core–shell heterojunction formation to alleviate the significant electron–hole recombination; ii) preserved morphology of small-diameter nanorods to provide a short hole diffusion distance; and iii) Ta and Sn codoping to enhance the electrical conductivity. These effects are not possible with conventional high temperature thermal synthesis in a furnace. As a result, core–shell Fe2O3@FeTaO4 electrode with FeOOH cocatalyst achieves a photocurrent density of 2.86 mA cm−2 at 1.23 VRHE under AM 1.5 G simulated sunlight (100 mW cm−2), which is ≈2.4 times higher than that of bare hematite (1.17 mA cm−2). In addition, the FeOOH/Fe2O3@FeTaO4 electrode exhibits a high surface charge separation efficiency of ≈85% and a modest bulk charge separation efficiency of ≈24%.
URI
https://scholarworks.unist.ac.kr/handle/201301/26437
URL
https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201805737
DOI
10.1002/adfm.201805737
ISSN
1616-301X
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