Carbon nanomaterials as glassy carbon modifiers for electrochemical devices with boosted activity

Glassy carbon electrodes (GCEs) modified with a composite made of multi-walled carbon nanotubes (MWCNTs) and electrochemically reduced graphene oxide (ERGO) were employed to investigate the electroactivity of dopamine (DA) an catechol (CA) which resulted into a significant improvement of the analytical performances. The same composite was used to support tyrosinase or laccase in order to fabricate amperometric biosensors for determining total polyphenols in juice samples, based on the reduction of the enzymatically produced quinone. Carbon based nanomaterials were also exploited to induce the electrosynthesis of layered double hydroxides (LDHs). Using glucose as target, electrocatalytic activity was found to be higher than when LDH was deposited on bare GCE.