796984.fig.002
Figure 2: Absorption spectra of the oxidation product against blank with different concentration of PZT: (a) 1.0, (b) 2.0, (c) 3.0, (d) 4.0, (e) 5.0, and (f) 6.0 μg mL−1, 1.0 mL of 5.0 M HCl, 1.5 mL of KBrO3 (100 μg mL−1), and 1.5 mL of 5.0 × 10−4 mol L−1 methyl orange dye.