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

Xiangnan Dou; Qiang Zhang; Syed Niaz Ali Shah; Mashooq Khan; Katsumi Uchiyama; Jin-Ming Lin

doi:10.1039/c8sc03511c

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

Chem Sci. 2018 Oct 15;10(2):497-500. doi: 10.1039/c8sc03511c. eCollection 2019 Jan 14.

Authors

Xiangnan Dou^{1

2}, Qiang Zhang¹, Syed Niaz Ali Shah¹, Mashooq Khan¹, Katsumi Uchiyama², Jin-Ming Lin¹

Affiliations

¹ Beijing Key Laboratory of Microanalytical Methods and Instrumentation , MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology , Department of Chemistry , Tsinghua University , Beijing , 100084 , China . Email: jmlin@mail.tsinghua.edu.cn.
² Department of Applied Chemistry , Graduate School of Urban Environmental Sciences , Tokyo Metropolitan University , Minamiohsawa, Hachioji , Tokyo 192-0397 , Japan.

Abstract

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 (˙O₂ ^-) and singlet oxygen (¹O₂) 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.