A general approach to one-step fabrication of single-piece nanocomposite membrane based Pb2+-selective electrodes

Yueling Liu, Yang Liu, Yingying Gao, Ping Wang

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A simple and general approach leading to well-dispersed and surfactant-free multi-walled carbon nanotubes (MWCNT) based single-piece Pb2+-selective nanocomposite membrane is proposed. The single-piece solid-contact Pb2+-selective electrodes were prepared via one-step drop casting the ultrasonicated suspension mixture on the golden electrodes. The obtained electrodes exhibited a Nernstian response slope of 29.0 ± 0.2 mV/decade in the linear range from 2.0 × 10−3 to 2.0 × 10−9 M and a low detection limit of 4.0 × 10−10 M. Due to the inherent high capacitance and hydrophobicity of nanocomposite membrane, excellent long-term potential stability and absence of water films were observed. Moreover, the sensor showed good resistance to interfering agents such as redox couple, light and gases. In addition, the proposed electrodes were demonstrated to be feasible for Pb2+ determination in tap water. Overall it was demonstrated as an appealing sensor for lead (II) detection for environmental and clinical applications.

Original languageEnglish (US)
Pages (from-to)705-712
Number of pages8
JournalSensors and Actuators, B: Chemical
Volume281
DOIs
StatePublished - Feb 15 2019
Externally publishedYes

Keywords

  • Ion selective electrode
  • Lead
  • Multi-walled carbon nanotubes
  • Nanocomposite
  • Single-piece

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