Self-powered cathodic detection of dissolved oxygen using a paper-based biofuel cell.

ABSTRACT: Herein we report the self-powered biosensor for detection of dissolved oxygen (DO) detection using a paper-based enzymatic biofuel cell (BFC) employing screen-printed electrodes composed of MgO-templated mesoporous carbon (MgOC). The sensor used an anode modified by flavin adenine dinucleotide-dependent glucose dehydrogenase (FAD-GDH) and a cathode modified by bilirubin oxidase (BOD) to enable selective oxygen reduction under glucose-rich conditions. Electrochemical analyses revealed a linear relationship between the cathodic current and DO concentration over the range of 0-22 mg L^-1, with a maximum power output of 398 µW cm^-2 at 20 mg L^-1 DO. The biosensor system was successfully used to quantify DO in both pure water and a commercial soft drink, without r

SUBMITTER: Shitanda I 

PROVIDER: S-EPMC12862783 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature