Structure effects of self-assembled Prussian blue confined in highly organized mesoporous TiO2 on the electrocatalytic properties towards H2O2 detection.
Here we report the derivatization of mesoporous TiO2 thin films for the preparation of H2O2 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) cations which are the starting point for the growth of a layer of Prussian blue polymer. The porous structure of the mesoporous TiO2 allows the growth, ion by ion of the coordination polymer. Up to four layer of Prussian blue can be deposit without losing the porous structure of the film, which results 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.
Gaitán
Martín
M
INQUIMAE-Facultad de Ciencias Exactas y Naturales-UBA, Pabellón 2, Ciudad Universitaria, C1428EHA, Ciudad de Buenos Aires, Argentina.
Gonçales
Vinicius R
VR
Soler-Illia
Galo J A A
GJ
Baraldo
Luis M
LM
de Torresi
Susana I Córdoba
SI
D015374:Biosensing Techniques / Q000295:instrumentation*; D002384:Catalysis; D003217:Conductometry / Q000295:instrumentation*; D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005295:Ferrocyanides / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000032:analysis* / Q000737:chemistry; D016062:Porosity; D014025:Titanium / Q000737:chemistry*
D005295:Ferrocyanides; C009495:titanium dioxide; D006861:Hydrogen Peroxide; D014025:Titanium; C000170:ferric ferrocyanide