File Name : fig.s1.tif Caption : fig.s1 tem images (a, b) of ni₂sno₄. File Name : fig.s2.tif Caption : fig.s2 effect of the dosage of oxidant on the catalytic oxidation of bpa in ni₂sno₄/ps system. File Name : fig.s3.tif Caption : fig.s3 effect of h₂po₄^– on the catalytic oxidation of bpa in ni₂sno₄–rgo/ps (a) and ni₂sno₄/ps (b) system.