Ultrathin sub-3 nm nitrogen-doped graphene quantum dot layers coated TiO 2 nanocomposites as high-performance photocatalysts

Sejung Kim, Haeun Chang, Jae Young Choi, Youngjun Song, Michael (Mike) Heller

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We introduce a facile fabrication process for ultrathin nitrogen-doped graphene quantum dot (NGQD) layers on TiO 2 nanoparticles in order to develop high-performance photocatalysts. NGQDs are grown either by graphitization of precursors or direct deposition of premade NGQDs. Photocatalytic performance is shown to be dependent on the thickness of NGQD layers and doping levels of C and N atoms on TiO 2 surfaces. The nanocomposites shown to absorb a broad range of visible light and narrow the bandgap by 0.38 eV, resulting in the increased density of photoinduced eletron-hole pairs and efficient charge separation at the interface between the NGQDs and TiO 2 .

Original languageEnglish (US)
Pages (from-to)1-5
Number of pages5
JournalChemical Physics Letters
Volume714
DOIs
StatePublished - Jan 16 2019
Externally publishedYes

Fingerprint

Graphite
Photocatalysts
Semiconductor quantum dots
Nanocomposites
nanocomposites
graphene
Nitrogen
quantum dots
nitrogen
Graphitization
graphitization
polarization (charge separation)
Energy gap
Doping (additives)
Nanoparticles
Fabrication
Atoms
nanoparticles
fabrication
atoms

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Ultrathin sub-3 nm nitrogen-doped graphene quantum dot layers coated TiO 2 nanocomposites as high-performance photocatalysts . / Kim, Sejung; Chang, Haeun; Choi, Jae Young; Song, Youngjun; Heller, Michael (Mike).

In: Chemical Physics Letters, Vol. 714, 16.01.2019, p. 1-5.

Research output: Contribution to journalArticle

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