Synthesis of silver nanowires and their applications in the electrochemical detection of halide

Preparation of graphene–Ag composites and their application for electrochemical detection of chloride

“…The electrode shows a good cycling behavior which would benefit for repeated qualitative detection of chloride ions. The current response of platinum electrode modified with Ag nanowires in aqueous solutions containing 5 mM KCl is 0.15 mA in the literature [6]. Under the same experimental conditions, the maximum and minimum current responses of oxidation peaks in this work are 5.3 and 3.1 times of the value reported in the literature [6], respectively.…”

“…As shown, one pair of redox peaks appear resulted from the formation and the reduction of AgCl [6]. The electrochemical reaction is described by the equation: AgCl + e Ð Ag + Cl À [6,28]. When chloride ions react with the Ag atoms in composites, silver chloride precipitate is formed on the electrode surface and consequently produces an oxidation wave on the cyclic voltammetry curves, while reduction of the silver chloride precipitate leads to generation of a reduction current and correspondingly a reduction wave is produced.…”

“…5. As shown, one pair of redox peaks appear resulted from the formation and the reduction of AgCl [6]. The electrochemical reaction is described by the equation: AgCl + e Ð Ag + Cl À [6,28].…”

“…Many researches have been focused on the fabrication of Ag films for electrochemical detection of halide [3][4][5][6]. Chiu et al [5] made a disposable screen printed silver strip sensor and detection limits for iodide, bromide, and chloride were 3.05 mM, 2.95 mM, and 18.83 mM, respectively.…”

“…Chiu et al [5] made a disposable screen printed silver strip sensor and detection limits for iodide, bromide, and chloride were 3.05 mM, 2.95 mM, and 18.83 mM, respectively. Qin et al [6] developed a silver nanowires modified platinum (Ag NWs/ Pt) electrode for simultaneous and selective determination of chloride, bromide, and iodide ions by cyclic voltammetry in aqueous solutions, and it showed that the Ag NWs/Pt electrode offered a useful platform for the development of a highly sensitive halide sensor.…”