Citation:
JIANG Wei, LIU Jie-Feng, ZHOU Tong-Wu, ZENG He-Ping. Synthesis, Characterization and Catalytic Properties of a Pillared-Layered Double Hydroxide ZnAl-La(TiW11)2[J]. Chinese Journal of Applied Chemistry,
;2006, 23(1): 99-105.
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Heteropoly complex ion with lanthanum——La(TiW11)2 was successfully intercalated into the interlayer space of Zn-Al, with Zn0.78Al0.22(OH)2·0.22C13H27COO·0.81H2O as precursor in an aqueous solution via ion exchange reaction, and a new type of pillared layered microporous compound, Zn0.76 Al0.24 (OH)·0.018[La(Ti0.97W11.5O39)2]·0.012C13H27COO·0.81H2O with higher basal space (d003=3.29 nm) was obtained.The composition, structure and properties of the new pillared material were characterized by elemental analysis, XRD, IR spectra and TG-DTA curves.The results show that myristic acid radical anion of precursor Zn0.78Al0.22(OH)2·0.22C13H27COO·0.81H2O can be almost completely replaced by complex anion[La(TiW11O39)2]13- under special controlled reaction conditions.The new pillared hydrotalcite has a good crystallinity, a regular layered structure and a good thermal stability.The orientation of the intercalated anion[La(TiW11O39)3]13- was deduced.It has also been found that the new material has a good catalytic activity and selectivity for the esterification of benzoic acid with diethylene glycol, the dehydration-cyclization of diethylene glycol, and the oxidation of benzaldehyde.
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