Journal
MATERIALS RESEARCH BULLETIN
Volume 97, Issue -, Pages 428-435Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2017.09.038
Keywords
Graphene quantum dots; Sulfur-functionalization; Photocatalytic
Categories
Funding
- National Natural Science Foundation of China [11764011, 21671129, 11364010, 51662004]
- Guangxi Natural Science Foundation, P. R. China [2016GXNSFAA380008, 2015GXNSFBA139002]
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Sulfur-doped graphene quantum dots (S-GQDs) decorated with high-quantum-yield titanium dioxide (TiO2) nanocomposite are synthesized by a simple hydrothermal method. Photoluminescence characterization shows that S-GQDs exhibit stronger absorption peaks at ultraviolet (UV) region than GQDs. Photocatalytic activity of the obtained S-GQD/TiO2 nanocomposite reaches 70% in 8 min; this activity is significantly enhanced compared with those of GQDs/TiO2 and pure TiO2. Improved UV light absorption and effective transfer of photogenerated electrons can be attributed to integration of S-GQDs with TiO2 in a cladding manner. The present work provides a new approach for development of attractive GQD-based nanocomposites with controllable structures and photocatalytic performance.
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