Masking agent-free and channel-switch-mode simultaneous sensing of Fe3+ and Hg2+ using dual-excitation graphene quantum dots

Fengzhou Xu; Hui Shi; Xiaoxiao He; Kemin Wang; Dinggeng He; Lv'an Yan; Xiaosheng Ye; Jinlu Tang; Jingfang Shangguan; Lan Luo

doi:10.1039/C5AN00468C

Masking agent-free and channel-switch-mode simultaneous sensing of Fe³⁺ and Hg²⁺ using dual-excitation graphene quantum dots†

Fengzhou Xu,‡^a Hui Shi,‡^a Xiaoxiao He,^a Kemin Wang,*^a Dinggeng He,^a Lv'an Yan,^a Xiaosheng Ye,^a Jinlu Tang,^a Jingfang Shangguan^a and Lan Luo^a

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^a State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, China
E-mail: kmwang@hnu.edu.cn

Abstract

A novel channel-switch-mode strategy for simultaneous sensing of Fe³⁺ and Hg²⁺ is developed with dual-excitation single-emission graphene quantum dots (GQDs). By utilizing the dual-channel fluorescence response performance of GQDs, this strategy achieved a facile, low-cost, masking agent-free, quantitative and selective dual-ion assay even in mixed ion samples and practical water samples.

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Masking agent-free and channel-switch-mode simultaneous sensing of Fe³⁺ and Hg²⁺ using dual-excitation graphene quantum dots†

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Masking agent-free and channel-switch-mode simultaneous sensing of Fe³⁺ and Hg²⁺ using dual-excitation graphene quantum dots

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