Upconversion and downconversion fluorescent graphene quantum dots : Ultrasonic preparation and photocatalysis

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

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Author(s)

  • Shujuan Zhuo
  • Mingwang Shao
  • Shuit-Tong Lee

Detail(s)

Original languageEnglish
Pages (from-to)1059-1064
Journal / PublicationACS Nano
Volume6
Issue number2
Publication statusPublished - 28 Feb 2012

Abstract

A facile ultrasonic route for the fabrication of graphene quantum dots (GQDs) with upconverted emission is presented. The as-prepared GQDs exhibit an excitation-independent downconversion and upconversion photoluminescent (PL) behavior, and the complex photocatalysts (rutile TiO 2/GQD and anatase TiO 2/GQD systems) were designed to harness the visible spectrum of sunlight. It is interesting that the photocatalytic rate of the rutile TiO 2/GQD complex system is ca. 9 times larger than that of the anatase TiO 2/GQD complex under visible light (λ > 420 nm) irradiation in the degradation of methylene blue. © 2012 American Chemical Society.

Research Area(s)

  • graphene quantum dots, photocatalysts, upconversion luminescence

Citation Format(s)

Upconversion and downconversion fluorescent graphene quantum dots : Ultrasonic preparation and photocatalysis. / Zhuo, Shujuan; Shao, Mingwang; Lee, Shuit-Tong.

In: ACS Nano, Vol. 6, No. 2, 28.02.2012, p. 1059-1064.

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