Synthesis and Surface Properties of Silica Spheres with Core Shell Structure by One Convenient Method

Figure 4

SEM micrographs of mesoporous silica molar ratios of methanol to CTAB: (a) 7∶1, (b) 8∶1, (c) 8.5∶1, (d) 9∶1, (e) 10∶1, (f) cracked silica particle of 9∶1 molar ratio, (g) cracked silica particle of 8.5∶1 molar ratio, (h) 600^∘C calcined silica particles of molar ratio 8.5∶1, (i) and (j) TEM micrographs of 600^∘C activated silica with molar ratio 8.5∶1 at different magnification, (k) TEM, (l) HRTEM micrographs of silica with molar ratio 8.5∶1 activated at 540^∘C.

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