Minimizing graphene defects enhances titania nanocomposite-based photocatalytic reduction of CO2 for improved solar fuel production

Yu Teng Liang, Baiju K. Vijayan, Kimberly A. Gray*, Mark C. Hersam

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

427 Scopus citations


With its unique electronic and optical properties, graphene is proposed to functionalize and tailor titania photocatalysts for improved reactivity. The two major solution-based pathways for producing graphene, oxidation-reduction and solvent exfoliation, result in nanoplatelets with different defect densities. Herein, we show that nanocomposites based on the less defective solvent-exfoliated graphene exhibit a significantly larger enhancement in CO2 photoreduction, especially under visible light. This counterintuitive result is attributed to their superior electrical mobility, which facilitates the diffusion of photoexcited electrons to reactive sites.

Original languageEnglish (US)
Pages (from-to)2865-2870
Number of pages6
JournalNano letters
Issue number7
StatePublished - Jul 13 2011


  • Photocatalysis
  • defect
  • graphene
  • nanocomposite
  • solar fuel
  • titania

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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