Graphene-Titania Hybrid Photoanodes by Supersonic Kinetic Spraying for Solar Water Splitting

Title
Graphene-Titania Hybrid Photoanodes by Supersonic Kinetic Spraying for Solar Water Splitting
Authors
Jong-Gun LeeDo-Yeon KimJung-Jae ParkYou-Hong ChaJoshua Y. Yoon전효상민병권Mark T. SwihartSungho JinSalem S. Al-DeyabSam S. Yoon
Keywords
graphene; titania; water splitting
Issue Date
2014-12
Publisher
Journal of the American Ceramic Society
Citation
VOL 97, NO 11, 3660-3668
Abstract
We report the synthesis of graphene–TiO2 (G–TiO2) composite films that exhibit significantly enhanced photoelectrochemical water-splitting performance relative to pure TiO2. Supersonic kinetic spraying was used to produce strongly adhered, electrically and mechanically robust G–TiO2 composite films containing 0.1, 0.5, 1.0, and 5.0 wt.% graphene. Films with an intermediate graphene content of 1.0 wt.% demonstrated the best water-splitting performance. G–TiO2 composite films with 1.0 wt.% graphene exhibited photocurrent density ten times that of pure TiO2 films. The electron transfer between TiO2 and graphene suppresses the recombination of photoinduced charge carriers and prolongs the electron excited-state lifetime, which contributes to the enhanced photoelectrochemical watersplitting performance.
URI
http://pubs.kist.re.kr/handle/201004/49272
ISSN
00027820
Appears in Collections:
KIST Publication > Article
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