Boron, nitrogen, and sulfur co‐doped carbon dots as a fluorescence probe for label‐free analysis of Hg2+

Author:

Ding Yu12,Chen Yanyan1,Wang Chaozhan1ORCID

Affiliation:

1. Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science Northwest University Xi'an People's Republic of China

2. Shaanxi Coal Based Special Fuel Research Institute Co., Ltd Xi'an People's Republic of China

Abstract

AbstractHg2+ is one of the most toxic heavy metals, posing a serious threat to the human body and the environmental ecosystem. In order to detect Hg2+ rapidly, accurately, and sensitively, a kind of boron, nitrogen, and sulfur co‐doped carbon dots (B,N,S‐CDs) were synthesized by a simple, economical, and direct hydrothermal method. The average size of the prepared B,N,S‐CDs is 2.7 ± 0.7 nm, and the high photoluminescence quantum yield is 67.6%. Furthermore, due to the efficient quenching effect of Hg2+, such B,N,S‐CDs are considered to serve as an efficient fluorescence sensing platform for label‐free and sensitive detection of Hg2+ with a detection limit of 72 nM. The selectivity experiments reveal that the B,N,S‐CDs are selective and specific for Hg2+ even in the presence of other interfering substances. Most importantly, the Hg2+ sensing platform based on B,N,S‐CDs can be successfully applied to the determination of Hg2+ in tap water and real lake water samples. This stable and inexpensive carbon material exhibits excellent sensitivity and selectivity, potentially suitable for Hg2+ monitoring in environmental applications.

Funder

National Natural Science Foundation of China

Publisher

Wiley

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