Facile synthesis of “boron-doped” carbon dots and their application in visible-light-driven photocatalytic degradation of organic dyes

Zhili Peng, Yiqun Zhou, Chunyu Ji, Joel Pardo, Keenan J. Mintz, Raja R. Pandey, Charles C. Chusuei, Regina M. Graham, Guiyang Yan, Roger M. Leblanc

Research output: Contribution to journalArticlepeer-review

Abstract

Carbon dots (C-dots) were facilely fabricated via a hydrothermal method and fully characterized. Our study shows that the as-synthesized C-dots are nontoxic, negatively charged spherical particles (average diameter 4.7 nm) with excellent water dispersion ability. Furthermore, the C-dots have a rich presence of surface functionalities such as hydroxyls and carboxyls as well as amines. The significance of the C-dots as highly efficient photocatalysts for rhodamine B (RhB) and methylene blue (MB) degradation was explored. The C-dots demonstrate excellent photocatalytic activity, achieving 100% of RhB and MB degradation within 170 min. The degradation rate constants for RhB and MB were 1.8 × 10−2 and 2.4 × 10−2 min−1, respectively. The photocatalytic degradation performances of the C-dots are comparable to those metal-based photocatalysts and generally better than previously reported C-dots photocatalysts. Collectively considering the excellent photocatalytic activity toward organic dye degradation, as well as the fact that they are facilely synthesized with no need of further doping, compositing, and tedious purification and separation, the C-dots fabricated in this work are demonstrated to be a promising alternative for pollutant degradation and environment protection.

Original languageEnglish (US)
Article number1560
Pages (from-to)1-17
Number of pages17
JournalNanomaterials
Volume10
Issue number8
DOIs
StatePublished - Aug 2020

Keywords

  • Carbon dots
  • Dye degradation
  • Environment clean
  • Methylene blue
  • Photo catalysis
  • Rhodamine B

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)

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