Direct electrodeposion of reduced graphene oxide and dendritic copper nanoclusters on glassy carbon electrode for electrochemical detection of nitrite

Di Zhang, Yuxin Fang, Zhiying Miao, Min Ma, Xin Du, Shigehiro Takahashi, Jun Ichi Anzai, Qiang Chen

Research output: Contribution to journalArticlepeer-review

115 Citations (Scopus)

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 214μAmMH cmr2, and the wide linear range from 1.25 x 10-3 to 13mM. 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.

Original languageEnglish
Pages (from-to)656-663
Number of pages8
JournalElectrochimica Acta
Volume107
DOIs
Publication statusPublished - 2013 Jan 1

Keywords

  • Copper nanodendrites
  • Electrodeposition
  • Graphene
  • Nitrite
  • Non-enzymatic sensor

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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