Influences of the (NH2)2CO concentration on magnetic photocatalytic composites

(a) The magnetization curves of samples G and D. (b) The photocatalytic degradation rates of the samples G, D and P25. And the molar ratios of (NH2)2CO to Ti (SO4)2 of the samples G and D were 16 and 50, respectively, the corresponding concentration of (NH2)2CO were 2 and 6.25 mol/L, respectively.208