期刊
APPLIED SURFACE SCIENCE
卷 526, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.146724
关键词
Phosphorus-doping; Graphene quantum dots; Photocatalysis; Charge transfer; P-n junction
类别
资金
- National Natural Science Foundation of China [51662004, 11604061, 11664007, 11764011]
- Natural Science Foundation of Guangxi Zhuang Autonomous Region of China [2018GXNSFAA050014, 2018GXNSFAA281191]
- Foundation of Guilin University of Technology [GLUTQD2002023]
Reducing the direct recombination of the photogenerated electron-hole pairs in a photocatalytic system is important to improve the photocatalytic efficiency. Transferring the photogenerated carriers to other adsorbates is a usual way to reduce the direct recombination probability. By synthesizing p-type phosphorus-doped graphene quantum dots (P-GQDs) to form p-n junctions with n-type TiO2 nanocomposites, the photogenerated holes of TiO2 can be effectively transferred to P-GQDs, thus the direct carrier recombination of TiO2 is decreased, resulting in the conspicuous improvement of the Methyl Orange (MO) photodegradation efficiency to 95.5% in 14 min. This work provides a new type of p-n junction in highly efficient photodegradation system.
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