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

Research output: Contribution to journalArticle

362 Citations (Scopus)

Abstract

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
Pages (from-to)2865-2870
Number of pages6
JournalNano Letters
Volume11
Issue number7
DOIs
Publication statusPublished - Jul 13 2011

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fuel production
Graphite
Graphene
Nanocomposites
nanocomposites
graphene
titanium
Titanium
Defects
defects
Defect density
Photocatalysts
Electronic properties
photochemical reactions
reactivity
Optical properties
optical properties
oxidation
Electrons
augmentation

Keywords

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

ASJC Scopus subject areas

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

Cite this

Minimizing graphene defects enhances titania nanocomposite-based photocatalytic reduction of CO2 for improved solar fuel production. / Liang, Yu Teng; Vijayan, Baiju K.; Gray, Kimberly A.; Hersam, Mark C.

In: Nano Letters, Vol. 11, No. 7, 13.07.2011, p. 2865-2870.

Research output: Contribution to journalArticle

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