Reversible hydrophobic to hydrophilic transition in graphene via water splitting induced by UV irradiation

Zhemi Xu, Zhimin Ao, Dewei Chu, Adnan Younis, Chang Ming Li, Sean Li

Research output: Contribution to journalArticlepeer-review

107 Citations (Scopus)

Abstract

Although the reversible wettability transition between hydrophobic and hydrophilic graphene under ultraviolet (UV) irradiation has been observed, the mechanism for this phenomenon remains unclear. In this work, experimental and theoretical investigations demonstrate that the H2O molecules are split into hydrogen and hydroxyl radicals, which are then captured by the graphene surface through chemical binding in an ambient environment under UV irradiation. The dissociative adsorption of H2O molecules induces the wettability transition in graphene from hydrophobic to hydrophilic. Our discovery may hold promise for the potential application of graphene in water splitting.

Original languageEnglish
Article number6450
JournalScientific reports
Volume4
DOIs
Publication statusPublished - 2014
Externally publishedYes

ASJC Scopus subject areas

  • General

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