Abstract
An inorganic-organic silica material (SBA-15-1), prepared by immobilization of the naphthalimide derivative within the channels of the mesoporous silica material SBA-15, is characterized by several spectroscopic methods. SBA-15-1 can be used as a chemical sensor for detecting and removing Hg2+ in a heterogeneous system. The fluorescence enhancement of SBA-15-1 was attributed to the formation of a complex between SBA-15-1 and Hg2+ by a 1:1 complex ratio with the photo-induced electron transfer (PET) being forbidden. The sensor can be applied to the quantification of Hg2+ with a linear range covering from 1.0 × 10−7 to 1.0 × 10−5 M under the neutral condition. Most importantly, the fluorescence changes of the sensor are remarkably specific for Hg2+ in the presence of other metal ions. Moreover, the response of the sensor toward Hg2+ is fast and chemically reversible. In addition, the sensor has been used for the determination of Hg2+ in environmental samples with satisfactory results.
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Li, YF., Wei, YF., Tan, Y. et al. Detection and Removal of Hg2+ Based on Mesoporous Silica Material Functionalized by Naphthalimide in Aqueous Solution. ANAL. SCI. 30, 257–262 (2014). https://doi.org/10.2116/analsci.30.257
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DOI: https://doi.org/10.2116/analsci.30.257