Fig. 7
a UV–Vis absorption spectra of BM solution containing the AgZnO/POMs nanocomposites, b removal curves of different materials for removing BM, curve: (1) POMs, (2) AgZnO, (3) AgZnO/POMs nanocomposites (The experiment was repeated three times), c Histogram of the removal of BM by POMs, AgZnO and AgZnO/POMs nanocomposites under UV and Vis irradiation (The experiment was repeated three times)