Bandgap Engineering of Coal-Derived Graphene Quantum Dots

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Zhiwei Peng
  • Andrew Metzger
  • Jian Lin
  • Jason A. Mann
  • Kewei Huang
  • Changsheng Xiang
  • Xiujun Fan
  • Errol L. G. Samuel
  • Lawrence B. Alemany
  • Angel A. Martí
  • James M. Tour

Detail(s)

Original languageEnglish
Pages (from-to)7041-7048
Journal / PublicationACS Applied Materials and Interfaces
Volume7
Issue number12
Online published10 Mar 2015
Publication statusPublished - 1 Apr 2015
Externally publishedYes

Abstract

Bandgaps of photoluminescent graphene quantum dots (GQDs) synthesized from anthracite have been engineered by controlling the size of GQDs in two ways: either chemical oxidative treatment and separation by cross-flow ultrafiltration, or by a facile one-step chemical synthesis using successively higher temperatures to render smaller GQDs. Using these methods, GQDs were synthesized with tailored sizes and bandgaps. The GQDs emit light from blue-green (2.9 eV) to orange-red (2.05 eV), depending on size, functionalities and defects. These findings provide a deeper insight into the nature of coal-derived GQDs and demonstrate a scalable method for production of GQDs with the desired bandgaps.

Research Area(s)

  • anthracite, bandgap, cross-flow filtration, graphene quantum dots, photoluminescent

Citation Format(s)

Bandgap Engineering of Coal-Derived Graphene Quantum Dots. / Ye, Ruquan; Peng, Zhiwei; Metzger, Andrew; Lin, Jian; Mann, Jason A.; Huang, Kewei; Xiang, Changsheng; Fan, Xiujun; Samuel, Errol L. G.; Alemany, Lawrence B.; Martí, Angel A.; Tour, James M.

In: ACS Applied Materials and Interfaces, Vol. 7, No. 12, 01.04.2015, p. 7041-7048.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review