An All-Solid-State Phosphate Electrode with H3PO4 Doped Polyaniline as the Sensitive Layer

Yuanfeng Huang, Ying Ye, Guochen Zhao, Xiaomin Wu, Yating Kan, Luis Mur, Jiwan Han, Huawei Qin

Research output: Contribution to journalArticlepeer-review

11 Citations (SciVal)
192 Downloads (Pure)


We here describe the construction of a highly sensitive and selective all-solid-state phosphate electrode based on polyaniline and H3PO4 doped polyaniline. The polyaniline layer was electroplated on the gold substrate with Chronoamperometry method and was in-situ doped by H3PO4. The Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM, EDS) and contact angle measurement was taken to explain the difference of the two layers. This electrode can be used in both freshwater and seawater systems. In both of the two systems, the electrode exhibits linear response in the concentration range 10-1 to 10-6 M with detection limit of 10-6 M. and response time of <1 seconds. The selectivity of the electrodes was also studied in 10-1-10-5 M KH2PO4 solutions containing either 0.01 M sulfate, nitrate, chloride as the interference ions. During 12 hours continuous monitoring in 10-3 M KH2PO4 with 3.5% NaCl the potential drift was 0.05 mV/h and the lifetime of the electrode was over 40 days when preserved in this solution
Original languageEnglish
Pages (from-to)4677-4691
JournalInternational Journal of Electrochemical Science
Issue number6
Publication statusPublished - 12 May 2017


  • phosphate
  • all-solid-state electrode
  • polyaniline
  • H3PO4 doped polyaniline
  • artificial seawater


Dive into the research topics of 'An All-Solid-State Phosphate Electrode with H3PO4 Doped Polyaniline as the Sensitive Layer'. Together they form a unique fingerprint.

Cite this