Main aim is to develop new non-enzymatic electrochemical sensors and study their performance in terms of kinetic rate constant, sensitivity and limit of detection. New sensors were developed by exploiting the functionalization of bismuth-composites on the surface of commercially available Screen Printed Carbon Electrodes. 12 different Bismuth composites based on HO-BiONO3, with organic surfactants such as polyethylene glycol (PEG) and polyvinyl butyral (PVB) coatings to HO-BiONO3, Bi5O7NO3, and also Bismuth (Bi3+) coated Biochar (pyrolysis at 10000C) based materials were synthesized in carbon group at Politecnico Di Torino. Scanning electron microscopic experiments showed that different materials have different sizes and shapes. HO-BiONO3 particles have been distributed with rod shaped structure and Bi5O7NO3 showed a sphere like structure by forming aggregates.