Highly luminescent S, N co-doped graphene quantum dots with broad visible absorption bands for visible light photocatalysts

A facile hydrothermal synthesis route to N and S, N co-doped graphene quantum dots was developed by using citric acid as the C source and urea or thiourea as N and S sources

Dan Qu; Min Zheng; Peng Du; Yue Zhou; Ligong Zhang; Di Li; Huaqiao Tan; Zhao Zhao; Zhigang Xie; Zaicheng Sun

2013

Scholarcy highlights

  • A facile hydrothermal synthesis route to N and S, N co-doped graphene quantum dots was developed by using citric acid as the C source and urea or thiourea as N and S sources
  • A broad absorption band in the visible region appeared in S, N co-doped GQDs due to doping with sulfur, which alters the surface state of GQDs
  • Both N and S, N doped GQDs showed high quantum yield, excitation independent under excitation of 340–400 nm and single exponential decay under UV excitation
  • The excellent photocatalytic performance of the S, N co-doped GQD/TiO2 composites was demonstrated by degradation of rhodamine B under visible light
  • This article is part of the themed collection: Nanoscale 10th Anniversary: Top Cited Articles

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