Preparation of Electrode Material Based to Bismuth Oxide-Attached Multiwalled Carbon Nanotubes for Lead (II) Ion Determination

Table 1

Fe²⁺/Fe³⁺ peak potentials and currents obtained from CV curves.

	Electrodes
	CNTs	Bi2O3@CNTs-20	Bi2O3@CNTs-50	Bi2O3@CNTs-70
(mA)	0.613	0.634	0.677	0.649
(V)	0.384	0.373	0.301	0.321
− (mA)	0.736	0.672	0.658	0.675
(V)	0.067	0.143	0.148	0.132