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In situ electrochemical synthesis of graphene-poly(arginine) composite for p-nitrophenol monitoring

Abstract : Para-Nitrophenol (p-nitrophenol) is a common industrial pollutant occurring widely in water bodies, yet actual monitoring methods are limited. Herein we proposed a fully electrochemically in situ synthesized graphenepolyarginine composite functionalized screen printed electrode, as a novel p-nitrophenol sensing platform. The electrode was characterized by morphologic, spectrometric and electrochemical techniques. p-Nitrophenol in both pure aqueous solution and real water samples was tested. Results show a detection limit as low as the nanomolar level, and display a linear response and high selectivity in the range of 0.5-1250 μM. Molecular simulation reveals a detailed synergy between graphene and poly-arginine. The preferable orientation of nitrophenol molecules on the graphene interface in the presence of poly-arginine induces Hand ionic binding. This sensor is an ideal prototype for p-nitrophenol quantification in real waters.
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Contributor : Eric Lichtfouse Connect in order to contact the contributor
Submitted on : Sunday, August 1, 2021 - 11:57:39 AM
Last modification on : Wednesday, March 23, 2022 - 9:22:08 AM
Long-term archiving on: : Tuesday, November 2, 2021 - 6:08:03 PM


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Yiwei Li, Yaohong Ma, Eric Lichtfouse, Jin Song, Rui Gong, et al.. In situ electrochemical synthesis of graphene-poly(arginine) composite for p-nitrophenol monitoring. Journal of Hazardous Materials, Elsevier, 2022, 421, pp.126718. ⟨10.1016/j.jhazmat.2021.126718⟩. ⟨hal-03311536⟩



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