期刊
CHEMISTRY OF MATERIALS
卷 25, 期 23, 页码 4710-4718出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm4022326
关键词
silylation; lamellar zeolite; Nu-6(1); interlayer pore expansion
资金
- National Natural Science Foundation of China [20925310, U1162102, 21373089]
- Ph.D. Programs Foundation of Ministry of Education [2012007613000]
- National Key Technology RD Program [2012BAE05B02]
- Shanghai Leading Academic Discipline Project [B409]
- Shanghai Synchrotron Radiation Facility [j13sr0021]
Inter layer-expanded zeolite, IEZ-NSI, has been post-synthesized from a two-dimensional (2D) layered precursor Nu-6(1) (Si/Al ratio = 30 - infinity) by intercalating with diethoxydimethylsilane in hydrochloric acid solution. Ethanol was demonstrated to be a suitable solvent for inducing an effective interlayer pillaring with monomeric silane. IEZ-NSI was revealed to possess a 3D crystalline structure composed of 10-membered ring (MR) channels by using Rietveld crystal structure refinement of the PXRD pattern of IEZ-Nu-6(1)-H (Si/Al = infinity). The 10-MR pores in IEZ-NSI were constructed through the linkages between the pillaring Si atoms and the NSI layers. IEZ-Nu-6(1)-H(Si/Al = infinity) crystallizes in space group P121/a1 (No. 14) with a = 22.9372(4) angstrom, b = 5.0205(5) angstrom, c = 13.8209(1) angstrom, and beta = 103.294(22)degrees. IEZ-NSI with more accessible channels gave a higher catalytic activity in the esterification of acetic acid with ethanol in comparison to Nu-6(2).
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