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

Table 3

Performance comparison of Bi₂O₃-modified electrodes for Pb²⁺ detection.

Electrode	Modification method	LOD (μg/L)	Sensitivity (μA/(μg/L))	Method	Ref.
Bi2O3-CS/GCPE	Surface dropping	30.1	0.045	DPASV	[63]
Bi2O3/SPE	Bulk modification	20.0	0.011	DPASV	[64]
Bi2O3/SPE	Bulk modification	10.0	—	DPASV	[65]
Bi2O3/SPE	Bulk modification	8.0	1.050	CCSCP	[66]
Bi2O3/SPE	Bulk modification	5.0	0.074	SWASV	[67]
Bi2O3/SPE	Surface modification	2.3	2.960	SWASV	[16]
Bi2O3@CNTs	Attachment	3.4	2.842	LSASV	This work

GCPE: glassy carbon paste electrode; CS: chitosan; SPE: screen-printed electrode; SWASV: square wave anodic stripping voltammetry; DPASV: different pulse anodic stripping voltammetry; CCSCP: constant current stripping chronopotentiometry.