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A Highly Sensitive Fluorescent Bulk Sensor Based on Isonicotinic Acid Hydrazide–Immobilized Nano-Fumed Silica (Fumed-Si–Inah) for Detection of Hg2+ and Cr3+ Ions in Aqueous Media Publisher



Mohammadi Ziarani G1 ; Fathi Vavsari V1 ; Badiei A2 ; Afshani J2 ; Gholamzadeh P1 ; Balalaie S3 ; Faridbod F2, 4 ; Ganjali MR4, 5
Authors

Source: Journal of the Iranian Chemical Society Published:2018


Abstract

Abstract: Through functionalizing of isonicotinic acid hydrazide (INAH) on to fumed silica nanoparticles, a novel fluorescent nanomaterial (fumed-Si–INAH) was synthesized and characterized using various techniques including FT-IR, SEM, and TGA. Next, interaction of the new nanofluorophore material with metal cations was studied spectrofluorimetrically. The fluorescence evaluation of fumed-Si–INAH towards a wide range of cations including Pb2+, Cd2+, Zn2+, Cu2+, Fe2+, Ca2+, Ni2+, Mn2+, Mg2+, Co2+, Na+, Hg2+, Cr3+, and K+ revealed that fumed-Si–INAH was a highly selective optical sensor for Hg2+ and Cr3+ ions in a wide range of pH in water. Thus, it was applied as a fluorescent bulk sensor for Hg2+ and Cr3+ ions. The detection limits were obtained to be 3.5 × 10−5 and 4.2 × 10−5 M for Hg2+ and Cr3+, respectively. Graphical abstract: [Figure not available: see fulltext.]. © 2017, Iranian Chemical Society.
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