Electrode modifier performance of TiO2 incorporated carbon quantum dots nanocomposites on Fe(CN)3−6/Fe(CN)4−6 electrochemical system

Simultaneous recognition of dopamine and uric acid in real samples through highly sensitive new electrode fabricated using ZnO/carbon quantum dots: bio-imaging and theoretical studies

“…K 4 [Fe(CN) 6 ] (5.0 mM) was used as substrate and studied in the potential range of −0.3 to 0.7 V in the electrolyte Britton-Robinson (B-R) solution ( pH 7.0, 0.04 M). The electrochemical currents (I) were measured with respect to the applied potential (E) at different sweep rates (30,40,50,60,70,80,90,100,110,120, and 130 mV s −1 ). The electrodes have produced reversible voltammograms due to the fast electron transfer kinetics, and the plotted data agree with anodic or cathodic currents against the square root of the sweeping velocity (Fig.…”

“…38 Thus, the catalytic and hetero nature of metal oxides have decreased the overpotential of some electrochemical reactions and beneficial for electrochemical redox reversibility rather than an irreversible process. [39][40][41] The high conductivity, catalytic activity and biocompatibility of metal oxide NPs are supportive for electrochemical processes when they are composited with carbon nanomaterials. [42][43][44][45] The use of carbon paste electrodes (CPE) in the electrochemical measurement of organic species ( pharmaceutical and biomolecules) has been reported.…”

Recent advances in β-cyclodextrin-based materials for chiral recognition

“…It is well-known that the performance of electrodes can be greatly increased by surface modification, 21 and the enantiospecific recognition ability of chiral sensors depends on the coated chiral selective agent. 22 Graphene is a single atom-thick flat sheet with a hexagonal and honeycomb lattice 23 and its derivatives mainly include graphene oxide (GO) 24 and reduced graphene oxide (RGO), 25 which are often considered to be the most promising carbon materials.…”