7Sen S E, Smith S M, Sullivan K A. Organic transforma- tions using zeolites and zeotype materials[J]. Tetrahedron, 1999,55:12657.
8φye G, Sj(Sblom J, Stoeker M. Synthesis, characterization and potential applications of new materials in the mesoporous range[J]. Adv Colloid Interf Sci, 2001,89: 439.
9Tagushi A, Schuth F. Ordered mesoporous materials in catalysis[J]. Micropor Mesopor Mater, 2005,77 : 1.
10Einarsrud M A, Nilsen E. Strengthening of water glass and colloidal sol based silica gels hy aging in TEOS[J]. J Non- Cryst Solids, 1998,226(122) : 122.
