Figure 2

(A) Nitrogen adsorption/desorption isotherms and pore size distribution of NLR, NSR and NS. (B) Size distribution of NLR, NSR and NS. (C) FTIR spectra and (D) zeta potentials of MSNs, MSN-NH2, MSN-COOH.

(A) Nitrogen adsorption/desorption isotherms and pore size distribution of NLR, NSR and NS. (B) Size distribution of NLR, NSR and NS. (C) FTIR spectra and (D) zeta potentials of MSNs, MSN-NH2, MSN-COOH.