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Multifunctional Binding Strategy on Nonconjugated Polymer Nanoparticles for Ratiometric Detection and Effective Removal of Mercury Ions
journal contribution
posted on 2020-08-06, 22:00 authored by Yu Zhu Fan, Lei Han, Yu Zhu Yang, Zhe Sun, Na Li, Bang Lin Li, Hong Qun Luo, Nian Bing LiDeveloping
a multifunctional platform for the selective detection
and effective removal of toxic ions is a major challenge when addressing
heavy metal contamination in environmental science. Herein, novel
nonconjugated polymer nanoparticles (PNPs) called mercaptosuccinic
acid-thiosemicarbazide PNPs (MT-PNPs) with appealing fluorescence
and stability are synthesized via facile one-step hydrothermal treatment
for attractive sensing and simultaneous removal of mercury(II). Interestingly,
aggregation-induced fluorescence switch-off and scattering enhancement
are found upon the addition of Hg2+, rendering MT-PNPs
as a ratiometric sensor for selective and accurate Hg2+ monitoring. A wide linear range (0.1–1471 μM) and a
low detection limit (95 nM) are obtained. This dual-signal opposite
responses triggered by Hg2+ originate from the formation
of MT-PNP-Hg2+ congeries via the multisite binding between
S,N,O-containing groups of MT-PNPs and mercury. Meanwhile, target-induced
aggregation renders an effective Hg2+ separation from contaminative
aqueous media by MT-PNPs, which exhibits a satisfactory absorption
efficiency of 90.42% within 50 min. Upon the simple Na2S treatment, the MT-PNPs can be regenerated and reused. This work
thus delivers an applicable method for the ratiometric detection and
effective removal of mercury with the novel nonconjugated PNPs, offering
potential in tackling the problem of heavy metal ion pollution for
environmental monitoring and remediation.
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Mercury Ionsaggregation-induced fluorescence sw...removalmultisite bindingmultifunctional platformNonconjugated Polymer Nanoparticlesnovel nonconjugated PNPs50 minmetal contaminationEffective RemovalHgmercaptosuccinic acid-thiosemicarba...ratiometric detectionhydrothermal treatmentMT-PNPRatiometric Detectionratiometric sensorMultifunctional Binding StrategyNa 2 S treatmentmonitoringnovel nonconjugated polymer nanopar...target-induced aggregationabsorption efficiencymetal ion pollution
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