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The aim of our work is to show a proof of principle of a new sensor concept. The sensing material consists of TiO2 nanoparticles combined with selective enzymes and dyes, which are able to detect phenolic molecules in water. A light induced excitation is employed to induce electron transfer from dye/enzyme to TiO2 layer. The generated electrical signal amplitude is related to the analyte concentration in water [1]. With this newly designed sensor in combination to well-chosen nanomaterial, we are able to detect a low concentration of phenolic molecules in drinking water, within the accepted maximum concentration defined by the European Commission. We study the sensing of catechol as a prominent molecule of the phenolic chemical compounds.

Enzymatic Sensor Based on Dye Sensitized TiO2 Electrode for Detection of Catechol in Water