Enhanced photocatalytic activity of sulfur-doped graphene quantum dots decorated with TiO2 nanocomposites

被引：41
|
作者：
Luo, Yi [1 ]
Li, Ming [1 ]
Hu, Guanghui [1 ]
Tang, Tao [1 ]
Wen, Jianfeng [1 ]
Li, Xinyu [1 ]
Wang, Liang [2 ]
机构：
[1] Guilin Univ Technol, Coll Sci, Guilin 541004, Peoples R China
[2] Shanghai Univ, Inst Nanochem & Nanobiol, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2018年 / 97卷
基金：
中国国家自然科学基金;
关键词：
Graphene quantum dots; Sulfur-functionalization; Photocatalytic; ONE-STEP SYNTHESIS; VISIBLE-LIGHT; CARBON DOTS; DYE-SENSITIZATION; OXYGEN REDUCTION; EFFICIENT; PERFORMANCE; NITROGEN; OXIDE; FABRICATION;
D O I：
10.1016/j.materresbull.2017.09.038
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
收藏
页码：428 / 435
页数：8
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