Premium
Ferrocene Tethered Polyvinyl Alcohol/Silica Film Electrode for Electrocatalytic Sulfite Sensing
Author(s) -
Jirimali Harishchandra Digambar,
Nagarale Rajaram Krishna,
Saravanakumar Durai,
Shin Woonsup
Publication year - 2018
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201700459
Subject(s) - sulfite , polyvinyl alcohol , ferrocene , vinyl alcohol , aqueous solution , overpotential , inorganic chemistry , polymer chemistry , chemistry , polymer , materials science , nuclear chemistry , electrode , electrochemistry , organic chemistry
Ferrocene was linked to polyvinyl alcohol polymer via ethylene dioxi‐bis‐ethylamine (PV‐Fc) spacer and the synthesized redox polymer was characterised by FT‐IR and H 1 NMR spectroscopy. Aqueous solution of PVA‐Fc was used to prepare its silica composite with tetraethylorthosilicate (TEOS). The immobilized PVA‐Fc/silica film showed E 0 about 0.245 V and apparent diffusion coefficient was measured to be 2.76×10 −8 cm 2 s −1 . The ferrocene with flexible spacer in PVA‐Fc/silica film showed an excellent electrocatalytic activity towards the sulfite oxidation at 0.35 V, that was minimum 0.3 V negative shift of the overpotential than the bare electrode. The effect of the interfearing species like acetate, ammonium, carbonate, phosphate and sulfate has been checked for the sulfite detection. Under the optimized conditions the prepared composite showed sulfite oxidation in the linear range of 5×10 −7 M to 1×10 −4 M and lower detection limits of 1.5×10 −7 M.