Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/17263
ชื่อเรื่อง: A Fluorescence Switching Sensor for Sensitive and Selective Detections of Cyanide and Ferricyanide Using Mercuric Cation-Graphene Quantum Dots
ผู้แต่ง: Kongsanan N.
Pimsin N.
Keawprom C.
Sricharoen P.
Areerob Y.
Nuengmatcha P.
Oh W.-C.
Chanthai S.
Limchoowong N.
วันที่เผยแพร่: 2021
บทคัดย่อ: This study aims to use graphene quantum dots (GQDs) as a fluorescence switching sensor (turn on-off) for the simultaneous detection of cyanide (CN-) and ferricyanide [Fe(CN)6]3- in wastewater samples. The GQDs were synthesized by pyrolyzing solid citric acid. The intrinsic blue color of the solution was observed under ultraviolet irradiation. The fluorescence spectrum was maximized at both excitation and emission wavelengths of 370 and 460 nm, respectively. The fluorescence intensity of GQDs decorated with Hg2+ (turn-off mode as the starting baseline) could be selectively turned on in the presence of CN- and once back to turn-off mode by [Fe(CN)6]3-. The fluorescence switching properties were used to develop a fluorescence turn-on-off sensor that could be used to detect trace amounts of CN- and [Fe(CN)6]3- in water samples. For highly sensitive detection under optimum conditions (Britton-Robinson buffer solution in the pH range of 8.0-9.0, linearity ranges of 5.0-15.0 μM (R2 = 0.9976) and 10.0-50.0 μM (R2 = 0.9994), respectively, and detection limits of 3.10 and 9.48 μM, respectively), good recoveries in the ranges of 85.89-112.66% and 84.88-113.92% for CN- and [Fe(CN)6]3-, respectively, were recorded. The developed methods were successfully used for the simultaneous and selective detection of CN- and [Fe(CN)6]3- in wastewater samples obtained from local municipal water reservoirs. ©
URI: https://ir.swu.ac.th/jspui/handle/123456789/17263
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108792913&doi=10.1021%2facsomega.1c01242&partnerID=40&md5=e33c92ccc7df08cfdfd8f03726451185
ISSN: 24701343
Appears in Collections:Scopus 1983-2021

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