File Name : fig.s1.tif Caption : fig.s1 sem image of (a) bmo nanosheets before and (b) after degradation, (c) polarized bmo before and (d) after degradation, and (e) annealed bmo before and (f) after degradation File Name : fig.s2.tif Caption : fig.s2 ecsa of different bmo samples File Name : fig.s3.tif Caption : fig. s3 the o 1s peak of polarized bmo after photocatalytic test