Rapid Determination of Mercury Ions in Environmental Water Based on an N-Rich Covalent Organic Framework Potential Sensor

Table 1

Comparison of various nanomaterials based on sensors for Hg²⁺ detection.

No.	Modified electrode	Linear range (μM)	LOD (nM)	Ref.
1	GCE/GA-UiO-66-NH2	0.001–2.2	0.9	[32]
2	GCE/L-Cys-Cu2O	0.33–3.3	0.02	[33]
3	GCE/NTOU4-nano-PANI	0.05–27.5	0.035	[34]
4	GCE/ZnFe2O4	10–100	80	[35]
5	GCE/ZIF-67/EG	-	1.28	[36]
6	GCE/Cu-MOFs	0.01–0.1	0.0048	[37]
7	GPE/COFTFPB-TZT	0.001–100	0.0045	This work

Note: GCE: glassy carbon electrode; GA: graphene aerogel; NTOU4-nano: zinc phosphite framework nanoparticle; PANI: conductive polyaniline; ZIF-67: cobased zeolitic imidazolate framework; EG: expanded graphite; Cu-MOFs: metal-organic frameworks.