Int J Environ Res Public Health
June 2024
We report the production and characterization of effective amperometric sensors for cathodic hydrogen peroxide (HO) detection. The proposed electrodes involve a combination of a HO-signaling Prussian Blue (PB)/carbon nanotube (CNT) layer with a glaze of the biopolymers gelatin (top) and zein (beneath) for protection against PB leakage. The sandwich-type sensor was constructed through simple "drop and dry" steps with (1) suspensions of the CNTs in a soluble PB solution, (2) zein in ethanol, and (3) gelatin in water, applied sequentially to the carbon working electrode disk of a screen-printed carbon electrode (SPCE) platform.
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