A novel method for incorporation of heteroatoms into the framework of ordered mesoporous silica materials synthesized in strong acidic media

  • Han Y
  • Xiao F
  • Wu S
 et al. 
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Abstract

Heteroatoms of Al and Ti are effectively introduced into the framework of ordered mesoporous silica materials (designated as MAS-7 and MTS-9, respectively) in strong acidic media (pH < 0) by a two-step procedure. MAS-7 shows high catalytic activities for the cracking of both small (cumene) and bulky (1,3,5-triisopropylbenzene) molecules because it combines the advantages of both zeolites (strong acidity) and mesoporous materials (large pores). In contrast, Al-SBA-15 samples prepared from both “post-synthesis” and “direct synthesis” present much lower catalytic activities than MAS-7. Furthermore, MTS-9 exhibits very high catalytic activity in phenol hydroxylation by H2O2, giving the phenol conversion of 26%, comparable to TS-1.

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