Fig. 2

(a) Effect of the initial ZnO NPs catalyst loading (10–100 mg L^− 1) on the photocatalytic degradation of BPA (5 ppm) under 365 nm UV light (4 × 8-W tube light), pH 7 at room temperature, (b) full scan UV-visible spectra after different ZnO NPs loading, (c) linear relationship between ZnO concentration catalyst dose and UV absorption, and (d) reusability and stability test