Journal of Applied Electrochemistry

, Volume 44, Issue 3, pp 419–425

Electrochemical determination of dissolved oxygen based on three dimensional electrosynthesis of silver nanodendrites electrode

  • Di Zhang
  • Yuxin Fang
  • Zhiying Miao
  • Min Ma
  • Qiang Chen
Original Article

DOI: 10.1007/s10800-013-0645-z

Cite this article as:
Zhang, D., Fang, Y., Miao, Z. et al. J Appl Electrochem (2014) 44: 419. doi:10.1007/s10800-013-0645-z

Abstract

In this paper, a highly sensitive electrochemical sensor for dissolved oxygen was prepared. A glassy carbon electrode was modified with silver nanodendrites that were synthesized by electrochemical deposition on the electrode without the use of a surfactant or template. The electrode displayed efficient electrocatalytic reduction of dissolved oxygen to form hydroxy ions via a four-electron reduction pathway, and a significant decrease in the respective overvoltage. The sensor responded linearly to dissolved oxygen in the 1.0–66.7 μM concentration range, and had a remarkably good sensitivity (0.169 μA μM−1) at an applied potential of −300 mV (vs. Ag/AgCl). The lower detection limit was 0.043 μM (at the signal-to-noise ratio of 3), and the response time was 5 s. The good performance was attributed to the enlarged electro-active surface of the dendritic silver nanostructures and to the efficiency of electron transfer between dissolved oxygen and the electrode. The sensor also showed good reproducibility, long-term stability, and relative good selectivity.

Keywords

Dissolved oxygen detectionSilver nanodendritesElectrocatalysisOxygen sensor

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Di Zhang
    • 1
  • Yuxin Fang
    • 2
  • Zhiying Miao
    • 1
  • Min Ma
    • 1
  • Qiang Chen
    • 1
  1. 1.The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life ScienceNankai UniversityTianjinPeople’s Republic of China
  2. 2.College of Acupuncture and MoxibustionTianjin University of Traditional Chinese MedicineTianjinPeople’s Republic of China