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>XPS spectra of Au@ZnO/Fe<sub>3</sub>O<sub>4</sub> (a) before and (b) after interaction with Hg<sup>2+</sup>.</div>

Nanomaterials and Nanotechnology

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Figure 4

Figure 4: 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 4 | 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 