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- Title
Sulfur-Doped Graphene Oxide Quantum Dots as Photocatalysts for Hydrogen Generation in the Aqueous Phase.
- Authors
Gliniak, Jacek; Lin, Jia‐Hoa; Chen, Yi‐Ting; Li, Chuen‐Ru; Jokar, Efat; Chang, Chin‐Hao; Peng, Chun‐Sheng; Lin, Jui‐Nien; Lien, Wan‐Hsiang; Tsai, Hui‐Min; Wu, Tung‐Kung
- Abstract
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 18 166 μmol h−1 g−1 in pure water and 30 519 μmol h−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.
- Subjects
GRAPHENE oxide; QUANTUM dots; PHOTOCATALYSTS; INTERSTITIAL hydrogen generation; SULFUR; DOPING agents (Chemistry)
- Publication
ChemSusChem, 2017, Vol 10, Issue 16, p3260
- ISSN
1864-5631
- Publication type
Article
- DOI
10.1002/cssc.201700910