Structure effects of self-assembled Prussian blue confined in highly organized mesoporous TiO2 on the electrocatalytic properties towards H2O2 detection

MARTÍN GAITÁN; VINICIUS R. GONÇALES; GALO J.A.A. SOLER-ILLIA; LUIS M. BARALDO; SUSANA I. CÓRDOBA DE TORRESI

BIOSENSORS & BIOELECTRONICS

ELSEVIER ADVANCED TECHNOLOGY

Año: 2010

0956-5663

Herewe report thederivatizationofmesoporous TiO2 thinfilms for thepreparationofH2O2 amperometric sensors. The coordination of the bifunctional ligand 1,10 phenantroline, 5,6 dione on the surface Ti(IV) ions provides open coordination sites for Fe(II) cationswhich are the starting point for the growof a layer of Prussian blue polymer. The porous structure of themesoporous TiO2 allows the growth, ion by ion of the coordination polymer.Up to four layer of Prussian blue can be depositwithout losing the porous structure of the film, which result in an enhanced response of these materials as H2O2 sensors. These porous confined PB modified electrodes are robust sensors that exhibit good reproducibility, environmental stability and high sensitivity towards H2O2 detection.