It was firstly described, that a TiO2 film modified titanium foil electrode (Ti/TiO2) shows an efficient
photoelectrocatalytic activity towards formaldehyde oxidation in a phosphate buffer solution. Ti/TiO2
foil electrode was prepared by anodizing Ti foil in aqueous solution. Also, this electrode was applied
for the hydrodynamic photoamperometry measurement of formaldehyde in the optimum conditions
(pH 7.0 as biological pH and bias potential 0.8 V vs. reference electrode). The photoelectrocatalytic
oxidation photocurrent of the photoelectrode determined by photoamperometry method was linearly
dependent on the formaldehyde concentration and the linearity range obtained was 6.70 104
–
1.48 102 mol L1
. Detection limit was found to be 3.09 104 mol L1 (2s).
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