Published: Jan. 1, 2023

Developing sensitive, conductive and cost-effectiveness renewable carbonaceous electrodes for electroanalysis of multiple heavy metal ions is greatly desirable achieving high-performance electrochemical sensing platforms. Herein, by combining experiments theoretical calculations, a novel boron-modified bio-carbon (B-bioC) sensitive material possessing high conductivity as well excellent electrocatalytic activity proposed simultaneous cadmium (Cd), lead (Pb) copper (Cu). The physico-chemical characterizations were performed SEM, XPS, FTIR, XRD, BET, then impedance CV EIS, respectively, electroanalytical tests evaluated using differential pulsed anodic stripping voltammetry (DPASV) in further. obtained B-bioC exhibited higher graphitization degree stemmed from the catalytic effect metalloid boron enhanced responses including lower impedance, faster electron-transfer kinetics stronger voltammetrical signals towards three target analyzes compared with pristine bio-carbon. combined advantages highly ordered sp2-carbon structures boron-bonding electroactive sites make great role increased properties modified (B-bioC/MEDs) detection limits Cd2+, Pb2+, Cu2+ low to 54, 4, 24 nM, which are comparable or even superior certain reported metal-modified bio-carbons. Finally, through DFT calculations concomitance XPS FTIR results, it was concluded that C-BO2 on optimum active site over seven B-bonding configurations. These findings provide new approaches deliberately designing synthesizing considerably materials fabricating platforms, more importantly, throw light pivotal roles B chemistry sensing.

Language: Английский