A single hybrid optical sensor based on nanoporous silica type SBA-15 for detection of Pb2+ and I− in aqueous media

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...

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Main Authors: Karimi, Mehdi, Badiei, Alireza, Mohammadi Ziarani, Ghodsi
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Badiei, Alireza
Mohammadi Ziarani, Ghodsi
description 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. Pb 2+ in the presence of different cations, including Na + , Mg 2+ , Al 3+ , K + , Ca 2+ , Mn 2+ , Co 2+ , Cu 2+ , Zn 2+ , Cd 2+ and Hg + , as well as I − among different anions, including NO 2 − , NO 3 − , CN − , Cl − , F − , Br − , CO 3 2− , SO 4 2− , HCO 3 − , and H 2 PO 4 − . The effects of pH, its applicability in real samples and reversibility are also discussed. Simple two-steps post synthesis procedure achieved the functionalized nanoporous SBA-15 as a single hybrid optical sensor for detecting Pb 2+ and I − ions in aqueous media.
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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. Pb 2+ in the presence of different cations, including Na + , Mg 2+ , Al 3+ , K + , Ca 2+ , Mn 2+ , Co 2+ , Cu 2+ , Zn 2+ , Cd 2+ and Hg + , as well as I − among different anions, including NO 2 − , NO 3 − , CN − , Cl − , F − , Br − , CO 3 2− , SO 4 2− , HCO 3 − , and H 2 PO 4 − . The effects of pH, its applicability in real samples and reversibility are also discussed. 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title A single hybrid optical sensor based on nanoporous silica type SBA-15 for detection of Pb2+ and I− in aqueous media
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