(a)
(b)
(c)
Figure 9: (a) The removal efficiency of MB with the N-doped CSEINPs versus time; the insets show the photographs of the MB aqueous solution before (left) and after (right) being treated with the N-doped CSEINPs. (b) Curve of the adsorbed amount of MB with the N-doped CSEINPs versus time . (c) Kinetics curves of adsorption of MB on the N-doped CSEINPs.