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

doi:10.1111/jace.13174

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 journal › Article › peer-review

10 Citations (Scopus)

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 language	English
Pages (from-to)	3660-3668
Number of pages	9
Journal	Journal of the American Ceramic Society
Volume	97
Issue number	11
DOIs	https://doi.org/10.1111/jace.13174
Publication status	Published - 2014 Nov 1

Bibliographical note

Publisher Copyright:
© 2014 The American Ceramic Society.

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1111/jace.13174

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title = "Graphene-titania hybrid photoanodes by supersonic kinetic spraying for solar water splitting",

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.",

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

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month = nov,

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doi = "10.1111/jace.13174",

language = "English",

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AU - Lee, Jong Gun

AU - Kim, Do Yeon

AU - Park, Jung Jae

AU - Cha, You Hong

AU - Yoon, Joshua Y.

AU - Jeon, Hyo Sang

AU - Min, Byoung Koun

AU - Swihart, Mark T.

AU - Jin, Sungho

AU - Al-Deyab, Salem S.

AU - Yoon, Sam S.

PY - 2014/11/1

Y1 - 2014/11/1

N2 - 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.

AB - 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.

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EP - 3668

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

IS - 11

ER -

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

Abstract

Bibliographical note

ASJC Scopus subject areas

UN SDGs

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