Rapid Colorimetric Detection of Hg (II) Based on Hg (II)-Induced Suppressed Enzyme-Like Reduction of 4-Nitrophenol by Au@ZnO/Fe<sub>3</sub>O<sub>4</sub> in a Cosmetic Skin Product

<div>The effect of the amount of 4-nitrophenol on the response signal; spectra showing the effect of varying concentrations of 4-nitrophenol on the response signal (a) before and (b) after adding mercury.</div>

Nanomaterials and Nanotechnology

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Figure 7

Figure 7: Rapid Colorimetric Detection of Hg (II) Based on Hg (II)-Induced Suppressed Enzyme-Like Reduction of 4-Nitrophenol by Au@ZnO/Fe<sub>3</sub>O<sub>4</sub> in a Cosmetic Skin Product 

Figure 7 | 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 