Clay/sol-gel-modified electrodes for the selective electrochemical monitoring of 2,4-dichlorophenol


OZSOZ M., ERDEM A., Ozkan D. , KERMAN K., PINNAVAIA T.

LANGMUIR, cilt.19, ss.4728-4732, 2003 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 19 Konu: 11
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1021/la034116v
  • Dergi Adı: LANGMUIR
  • Sayfa Sayıları: ss.4728-4732

Özet

A glassy carbon electrode (GCE) and a single-use pencil graphite electrode (PGE) modified through the incorporation of a mixed-ion, amphiphilic, fluorohectorite heterostructure, wherein the galleries are regularly interstratified by hydrophilic inorganic ions (Na+) and lipophilic onium ions, are shown to be efficient electrochemical sensors for the specific determination of the pollutant 2,4-dicholorophenol (2,4-DCP) when incorporated at the 2.5% (v/v) level into a sol-gel (triethoxysilane) matrix on the electrode surface. The voltammetric detection of 2,4-DCP resulted in low detection limits of 26.66 nM and 19.32 nM at the 2.5% (v/v) clay/sol-gel-modified GCE and PGE, respectively, based on a signal-to-noise ratio of 3. The reproducible data obtained from the single-use clay/sol-gel-modified PGE show promise for the microfabrication of a remote sensor specific for 2,4-DCP detection.