Figure 2

(a) XRD patterns of SS, MPSS and MSNS. (b) Raman spectra of MPSS and MSNSS. (c) BET surface area measurements of SS, MPSS, and MSNS with type IV N2 adsorption and desorption isotherms. The inset shows the pore size distribution of SS, MPSS, and MSNS. (d) TGA/DTA analysis of the MSNS between room temperature and 900 °C in air. Scan rate: 10 °C/min.