Journal
RSC ADVANCES
Volume 5, Issue 46, Pages 36530-36539Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra02692j
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Funding
- research council of the University of Tehran
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A novel organic-inorganic hybrid optical sensor (HQS-SBA-15) was prepared by a two-step post synthesis of SBA-15: functionalization with 3-(iodopropyl)-trimethoxysilane followed by the covalent attachment of 8-hydroxyquinoline-5-sulfonic acid. XRD, N-2 adsorption-desorption, TEM and FT-IR were used for the characterization of the prepared materials. A fluorescence study showed that the suspension of HQS-SBA-15 in water was able to detect selectively and sensitively two ions with opposite charges, i.e. Pb2+ in the presence of different cations, including Na+, Mg2+, Al3+, K+, Ca2+, Mn2+, Co2+, Cu2+, Zn2+, Cd2+ and Hg+, as well as I- among different anions, including NO2-, NO3-, CN-, Cl-, F-, Br-, CO32-, SO42-, HCO3-, and H2PO4-. The effects of pH, its applicability in real samples and reversibility are also discussed.
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