Publication: Nonenzymatic sensor for hydrogen peroxide using a carbon paste electrode modified with a composite consisting of silver nanoparticles, poly(o-aminobenzoic acid) and magnetite
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Issued Date
2015-01-01
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ISSN
14523981
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2-s2.0-84930158118
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Mahidol University
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SCOPUS
Bibliographic Citation
International Journal of Electrochemical Science. Vol.10, No.6 (2015), 4611-4625
Suggested Citation
Sanoe Chairam, Wongduan Sroysee, Chantanee Boonchit, Chayanee Kaewprom, Tivagorn Goedsak Na Wangnoi, Maliwan Amatatongchai, Purim Jarujamrus, Suparb Tamaung, Ekasith Somsook Nonenzymatic sensor for hydrogen peroxide using a carbon paste electrode modified with a composite consisting of silver nanoparticles, poly(o-aminobenzoic acid) and magnetite. International Journal of Electrochemical Science. Vol.10, No.6 (2015), 4611-4625. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/35780
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Title
Nonenzymatic sensor for hydrogen peroxide using a carbon paste electrode modified with a composite consisting of silver nanoparticles, poly(o-aminobenzoic acid) and magnetite
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Abstract
© 2015 The Authors. A nonenzymatic hydrogen peroxide (H<inf>2</inf>O<inf>2</inf>) sensor using a carbon paste electrode (CPE) modified with a composite consisting of silver nanoparticles (AgNPs), poly(o-aminobenzoic acid) (P(ABA)) and magnetite (Fe<inf>3</inf>O<inf>4</inf>) is reported. The AgNPs-P(ABA)-Fe<inf>3</inf>O<inf>4</inf> composite was prepared under sonication and characterized using transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and vibrating sample magnetometer (VSM). Electrochemical investigations indicated that a carbon paste electrode modified with AgNPs-P(ABA)-Fe<inf>3</inf>O<inf>4</inf> exhibits excellent performance in the electrochemical reduction of H<inf>2</inf>O<inf>2</inf> at an applied potential of -0.4 V versus Ag/AgCl (sat. 3.0 M KCl) in phosphate buffer solution. Under optimum condition, the calibration curve for H<inf>2</inf>O<inf>2</inf> was obtained in a wide range of 5 μM to 5.5 mM with the limit of detection (LOD) of 1.74 μM (S/N = 3). The AgNPs-P(ABA)-Fe<inf>3</inf>O<inf>4</inf> modified electrode has a good stability in practical conditions. In addition, the fabricated sensor was applied to determine H<inf>2</inf>O<inf>2</inf> in real samples with good results.