Fig. 2
The Catalytic activity assay of FeS2-based NPs as Fenton reagents. (A) The particle size distributions of FeS2-based NPs were detected by DLS. (B) Fluorescence intensity of HPF in reaction systems with H2O2 substrate at different concentrations of FeS2 NPs as Fenton catalysts. (C) UV-vis absorbance spectra and color changes of TMB in different reaction systems. The relative catalytic activity of FeS2-based NPs in reaction systems of (D) different pH (E) different concentrations, and (F) different temperatures with H2O2 substrate. All data were expressed as the mean ± SD (n = 3. Statistics were done using one-way ANOVA with Tukey multi-comparisons. *p < 0.05, **p < 0.01, ***p < 0.001 and ns, no significance)