MoS2-quantum dot triggered reactive oxygen species generation and depletion: responsible for enhanced chemiluminescence

被引：109

作者：

Dou, Xiangnan ^{[1
,2
]}

Zhang, Qiang ^{[1
]}

Shah, Syed Niaz Ali ^{[1
]}

Khan, Mashooq ^{[1
]}

Uchiyama, Katsumi ^{[2
]}

Lin, Jin-Ming ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, MOE Key Lab Bioorgan Phosphorus Chem & Chem Biol, Beijing Key Lab Microanalyt Methods & Instrumenta, Beijing 100084, Peoples R China

[2] Tokyo Metropolitan Univ, Grad Sch Urban Environm Sci, Dept Appl Chem, Hachioji, Tokyo 1920397, Japan

来源：

CHEMICAL SCIENCE | 2019年 / 10卷 / 02期

基金：

中国国家自然科学基金;

关键词：

RADICAL GENERATION; HYDROXYL RADICALS; HYDROGEN-PEROXIDE; SINGLET-OXYGEN; RATE CONSTANTS; QUANTUM DOTS; MOS2; DEGRADATION; MECHANISM; PHOTOSENSITIZATION;

D O I：

10.1039/c8sc03511c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Reactive oxygen species (ROS) generation is of intense interest because of its crucial role in many fields. Here we demonstrate that MoS2-QDs exhibit a promising capability for the generation of reactive oxygen species, which leads to enhanced chemiluminescence. We discovered that the unique performance is due to hydroxyl radical activation increasing the active catalytic sites on molybdenum sulphide quantum dots (MoS2-QDs). The reactive oxygen species, such as hydroxyl radicals (OH), superoxide radicals (O-2(-)) and singlet oxygen (O-1(2)) have been efficiently generated from H2O2 solution in alkaline conditions. In particular, the maximum OH yield was enhanced significantly (9.18 times) compared to the Fe(ii)/H2O2 Fenton system under neutral conditions. These findings not only enrich our understanding of the fascinating performance of MoS2 QDs, but also provide a new pathway for ROS generation in all kinds of pH environment.

引用

页码：497 / 500

页数：4

共 33 条

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