Phosphorus-doped graphene quantum dots loaded on TiO2 for enhanced photodegradation

被引：73

作者：

Guo, Zengsheng ^{[1
,2
,3
]}

Wu, Hao ^{[1
,2
,3
]}

Li, Ming ^{[1
]}

Tang, Tao ^{[1
]}

Wen, Jianfeng ^{[1
,2
,3
]}

Li, Xinyu ^{[1
,2
,3
]}

机构：

[1] Guilin Univ Technol, Coll Sci, Guilin 541004, Peoples R China

[2] Guilin Univ Technol, Minist Prov Jointly Constructed Cultivat Base, State Key Lab Proc Mom Ferrous Met & Featured Mat, Guilin 541004, Peoples R China

[3] Guilin Univ Technol, Key Lab Nonferrous Mat & New Proc Technol, Guilin 541004, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2020年 / 526卷

基金：

中国国家自然科学基金;

关键词：

Phosphorus-doping; Graphene quantum dots; Photocatalysis; Charge transfer; P-n junction; PHOTOCATALYTIC DEGRADATION; ELECTRONIC-PROPERTIES; NANOTUBE ARRAYS; POLLUTANTS; COMPOSITE; PERFORMANCE;

D O I：

10.1016/j.apsusc.2020.146724

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页数：7

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