Rapid Colorimetric Detection of Hg (II) Based on Hg (II)-Induced Suppressed Enzyme-Like Reduction of 4-Nitrophenol by Au@ZnO/Fe₃O₄ in a Cosmetic Skin Product

Table 1

Comparison of the proposed method with other reported Au-based nanoenzymes for the detection of Hg²⁺.

Material	Method	Linear range (nM)	Detection limit (nM)	Ref
AuNP@MOF	Reductase mimetic	0.2–0.4	0.10	[26]
AuNP	Reductase mimetic	0–10	1.45	[36]
Au@ZnO/Fe3O4	Reductase mimetic	0–10	2.34	This work
Fe3O4@ZnO	Peroxidase mimetic	0–10	23	[69]
Cs-AuNP	Peroxidase mimetic	0–200	20	[34]