• 文献标题:   Sulfur-Doped Graphene Oxide Quantum Dots as Photocatalysts for Hydrogen Generation in the Aqueous Phase
  • 文献类型:   Article
  • 作  者:   GLINIAK J, LIN JH, CHEN YT, LI CR, JOKAR E, CHANG CH, PENG CS, LIN JN, LIEN WH, TSAI HM, WU TK
  • 作者关键词:  
  • 出版物名称:   CHEMSUSCHEM
  • ISSN:   1864-5631 EI 1864-564X
  • 通讯作者地址:   Natl Chiao Tung Univ
  • 被引频次:   10
  • DOI:   10.1002/cssc.201700910
  • 出版年:   2017

▎ 摘  要

Sulfur-doped graphene oxide quantum dots (S-GOQDs) were synthesized and investigated for efficient photocatalytic hydrogen generation application. The UV/Vis, FTIR, and photoluminescence spectra of the synthesized S-GOQDs exhibit three absorption bands at 333, 395, and 524 nm, characteristic of C=S and C=S stretching vibration signals at 1075 and 690 cm(-1), and two excitation-wavelength-independent emission signals with maxima at 451 and 520 nm, respectively, confirming the successful doping of S atom into the GOQDs. Electronic structural analysis suggested that the S-GOQDs exhibit conduction band minimum (CBM) and valence band maximum (VBM) levels suitable for water splitting. Under direct sunlight irradiation, an initial rate of 18166 mu molh(-1) g(-1) in pure water and 30519 mu molh(-1) g(-1) in 80% ethanol aqueous solution were obtained. Therefore, metal-free and inexpensive S-GOQDs hold great potential in the development of sustainable and environmentally friendly photocatalysts for efficient hydrogen generation from water splitting.