SBA-15 Functionalized with Naphthalene Derivative for Selective Optical Sensing of Cr₂O₇²⁻ in Water

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  • KARIMI Mehdi
    School of Chemistry, College of Science, University of Tehran
  • BADIEI Alireza
    School of Chemistry, College of Science, University of Tehran Nanobiomedicine Center of Excellence, Nanoscience and Nanotechnology Research Center, University of Tehran
  • MOHAMMADI ZIARANI Ghodsi
    Department of Chemistry, Faculty of Science, Alzahra University

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  • SBA-15 Functionalized with Naphthalene Derivative for Selective Optical Sensing of Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> in Water

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A novel organic-inorganic hybrid optical sensor (NUS) was designed and prepared in two steps: the grafting of 3-(isocyanatopropyl)trimethoxysilane onto the surface of SBA-15, and then the attachment of naphthalene-1-amine. The obtained materials were characterized using low-angle XRD, N2 adsorption-desorption, TGA, FT-IR, and TEM techniques. A fluorescence study revealed that the NUS was a highly selective optical sensor for the detection of Cr2O72− among various anions, including F−, I−, Cl−, Br−, CO32−, HCO3−, NO3−, H2PO4−, CH3COO−, and NO2− with a good linearity between the fluorescence intensity and the concentration of Cr2O72− as well as a detection limit of 1.2 × 10−7 M in a 100% aqueous medium. Moreover, the applicability of real samples of the sensor is also discussed.

収録刊行物

  • Analytical Sciences

    Analytical Sciences 32 (5), 511-516, 2016

    社団法人 日本分析化学会

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