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Silver Nanoparticle-Functionalized Poly (3, 4-ethylenedioxythiophene): polystyrene Film on Glass Substrate for Electrochemical Determination of Nitrite
Di Pang a,‡, Chuang Ma a,‡, Duozhe Chen a, Yuliang Shen a, Weiqing Zhu a, Juanjuan Gao a,d, Haiou Song b, c, Xumei Zhang a, Shupeng Zhang a,c*
a School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
b School of Environment, Nanjing Normal University, Nanjing, 210097, PR China
c Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering, Yancheng 210009, P.R. China
d College of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, PR China
‡ D. Pang and C. Ma contributed equally to this work.
Abstract
A high-performance electrochemical sensor based on silver-nanoparticle-functionalized poly (3, 4-ethylenedioxythiophene): polystyrene (PEDOT:PSS) film on the common glass (Ag-CSA-PEDOT:PSS) was constructed by simple electrodeposition. The concentrated sulfuric-acid-treated PEDOT:PSS polymeric (CSA-PEDOT:PSS) film on common glass can be used as an electrode substrate to replace an expensive glassy carbon electrode (GCE). The unique properties of the Ag-CSA-PEDOT:PSS film were investigated using X-ray photoelectron spectroscopy, atomic-force microscopy, X-ray diffractometry, cyclic voltammetry and amperometric i-t. The Ag-CSA-PEDOT:PSS film electrode provides a highly sensitive determination of nitrite compared with indium tin oxide or the GCE substrate. Additional time was not required to polish the GCE surface. The Ag-CSA-PEDOT:PSS film electrode exhibited a broad linear range of 0.5–3400 μM, and had a lower detection limit of 0.34 μM (S/N = 3) in phosphate buffer solutions. Ag-CSA-PEDOT:PSS film electrodes can be used for sample detection of nitrite because they have a strong anti-interference ability, high reproducibility and high long-term stability. The fabrication strategy would provide a promising route to construct the novel electrochemical sensors.
https://www.sciencedirect.com/science/article/pii/S1566119919303933
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