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Hemin Modified SnO 2 Films on ITO‐PET with Enhanced Activity for Electrochemical Sensing
Author(s) -
Panagiotopoulos Apostolos,
Gkouma Anthi,
Vassi Andriana,
Johnson Christopher J.,
Cass Anthony E. G.,
Topoglidis Emmanuel
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.201800188
Subject(s) - hemin , electrochemistry , electrode , substrate (aquarium) , hydrothermal circulation , materials science , chemical engineering , analytical chemistry (journal) , nuclear chemistry , chemistry , chromatography , heme , organic chemistry , oceanography , engineering , enzyme , geology
We present a simple and efficient method for the preparation of hemin‐modified SnO 2 films on low cost, flexible, conducting ITO‐PET substrates to enable the development of a sensitive electrochemical sensor for the determination of H 2 O 2 . Using a hydrothermal processing method meant that the SnO 2 films can be prepared at low temperatures, compatible with the PET substrate. The properties of the electrodes enable a high hemin loading to be achieved in a stable and functional way, allowing the direct reduction and oxidation of the immobilized hemin and maintaining its high electrocatalytic activity in the reduction of H 2 O 2 on the surface. The results showed a sensitive response linearly proportional to the concentration of H 2 O 2 in the range 1.5 to 90 μM.