Graphene-titania hybrid photoanodes by supersonic kinetic spraying for solar water splitting

Jong Gun Lee, Do Yeon Kim, Jung Jae Park, You Hong Cha, Joshua Y. Yoon, Hyo Sang Jeon, Byoung Koun Min, Mark T. Swihart, Sungho Jin, Salem S. Al-Deyab, Sam S. Yoon

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)3660-3668
Number of pages9
JournalJournal of the American Ceramic Society
Volume97
Issue number11
DOIs
Publication statusPublished - 2014 Jan 1

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Lee, J. G., Kim, D. Y., Park, J. J., Cha, Y. H., Yoon, J. Y., Jeon, H. S., Min, B. K., Swihart, M. T., Jin, S., Al-Deyab, S. S., & Yoon, S. S. (2014). Graphene-titania hybrid photoanodes by supersonic kinetic spraying for solar water splitting. Journal of the American Ceramic Society, 97(11), 3660-3668. https://doi.org/10.1111/jace.13174