AbstractIn this work, highly monodispersed palladium-nickel (Pd-Ni)
nanoparticles supported on reduced graphene oxide (rGO) were synthesized by the
microwave-assisted methodology. The synthesized nanoparticles were used for
modification of a glassy carbon electrode (GCE) to produce our final product as
PdNi@rGO/GCE, which were utilized for non-enzymatic detecting of glucose. In the
present study, electrochemical impedance spectroscopy (EIS), chronoamperometry (CA)
and, cyclic voltammetry (CV) methods were implemented to investigate the sensing
performance of the developed glucose electrode. The modified electrode,
PdNi@rGO/GCE, exhibited very noticeable results with a linear working range of
0.05–1.1 mM. Moreover, an ultralow detection limit of 0.15 μM was achieved.
According to the results of amperometric signals of the electrodes, no significant
change was observed, even after 250 h of operation period. In addition, the highly
monodisperse PdNi@rGO/GCE was utilized to electrochemical detection of glucose in
real serum samples. In light of the results, PdNi@rGO/GCE has shown an excellent
sensing performance and can be used successfully in serum samples for glucose
detection and it is suitable for practical and clinical applications.
Waste eggshell membrane-templated synthesis of functional Cu2+–Cu+/biochar for an ultrasensitive electrochemical enzyme-free glucose sensor
