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Highly Sensitive Fluorescence Sensor for mercury(II) Based on Boron- And Nitrogen-Co-Doped Graphene Quantum Dots

Highly Sensitive Fluorescence Sensor for mercury(II) Based on Boron- And Nitrogen-Co-Doped Graphene Quantum Dots

Zhenyu Liu, Zunli Mo, Xiaohui Niu, Xing Yang, Yangyang Jiang, Pan Zhao, Nijuan Liu, Ruibin Guo

J Colloid Interface Sci. 2020 Apr 15;566:357-368.

PMID: 32114359

Abstract:

In this work, we invented a new method to synthesize boron- and nitrogen-co-doped graphene quantum dots (B, N-GQDs). This synthesis method was more reliable, simple, and environmentally friendly than the bottom-up methods reported in the current literature that use citric acid or other organic materials as the carbon source. Instead, B, N-GQDs were synthesized from graphene oxide (GO) by a top-down method. The obtained B, N-GQDs showed a bright blue luminescence under a UV lamp at 365 nm, and the absolute photoluminescence quantum yield (PLQY) was 5.13%. Because mercury(II) ions (Hg2+) are highly toxic and can seriously affect the ecological environment and human health, the detection of low-concentration Hg2+ and the establishment of rapid, accurate and sensitive methods for detecting Hg2+ are of great significance to the activities of life, including those of humans. Therefore, using the good luminescence properties of B, N-GQDs, we invented a new type of fluorescence sensor that can detect Hg2+. The sensor was very sensitive to Hg2+, had a good linear relationship in the concentration range of 0.2-1 μM, and exhibited a minimum limit of detection of 6.4 nM. Furthermore, this approach was successfully applied to the detection of Hg2+ in real environmental water samples.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS76153	Boron/Nitrogen co-doped graphene			Price

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