Oxidase-Like Catalytic Performance of Nano-MnO₂ and Its Potential Application for Metal Ions Detection in Water

Figure 3

UV-Vis absorption spectra of 2,6-DMP reacted with different nano-MnO₂ concentrations at the wavelength of 250–600 nm. Reaction conditions: Nano-MnO₂ = 0.005–0.32 mg·mL⁻¹; 2,6-DMP = 1.0 mmol·L⁻¹.