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>UV-vis absorbance spectra showing the effect of the catalyst and Hg<sup>2+</sup> on the reduction of 4-nitrophenol to 4-aminophenol.</div>

Nanomaterials and Nanotechnology

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Figure 5

Figure 5: 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 5 | 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 