Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6617142 | Electrochimica Acta | 2013 | 40 Pages |
Abstract
We have developed an effective strategy to fabricate a novel non-enzymatic nitrite sensor. Copper nanodendrites (Cu-NDs) and reduced graphene oxide (RGO) were successively deposited on glassy carbon electrode (GCE) via a simple and two-step electrodeposition method. The fabricated sensor showed an excellent electrocatalytic activity for nitrite reduction. Moreover, the effects of electrodeposition circles, Cu2+ concentration, pH value and detection potential on the current responses of Cu-NDs/RGO/GCE toward nitrite were optimized to obtain the maximal sensitivity. Under optimal experimental conditions, Cu-NDs/RGO/GCE demonstrated the low detection limit of 0.4 μM nitrite (signal-to-noise ratio, S/N = 3), the high sensitivity of 214 μA mMâ1 cmâ2, and the wide linear range from 1.25 Ã 10â3 to 13 mM. The superior response of the sensor to nitrite was mainly attributed to the enlarged surface-to-volume ratio with more electroactive sites and the synergistic effect of Cu-NDs and RGO. This work presented a feasible approach for future research in non-enzymatic amperometric sensors and other surface functionalizing.
Related Topics
Physical Sciences and Engineering
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Chemical Engineering (General)
Authors
Di Zhang, Yuxin Fang, Zhiying Miao, Min Ma, Xin Du, Shigehiro Takahashi, Jun-ichi Anzai, Qiang Chen,