铁铝复合柱撑粘土的制备、柱结构和稳定性(Ⅰ)  

PREPARATION,PILLARINC STRUCTURE AND THERMAL STABILITY OF HYDROXY-Fe-Al PILLARED CLAYS CONTAINING MIXED-METAL COMPLEXES (Ⅰ)

作　　者：赵东源[1] 杨亚书[1] 郭燮贤[1] 王国甲[2] 

机构地区：[1]中国科学院大连化学物理研究所,大连116023 [2]吉林大学化学系,长春130023

出　　处：《物理化学学报》1993年第2期193-199,共7页Acta Physico-Chimica Sinica

摘　　要：用两种方法合成了一系列不同Fe/Al比的铁铝复合柱撑牯土(FeAl-PlLC).用^(27)Al-NMR、UV、ESR 等手段考察了柱溶液的结构和状态,用XRD、DTA、UV-DRS 等技术对其结构、稳定性进行了研究.结果表明,铁铝柱撑粘土的底面间距为1.98～1.55nm,Fe/Al 比对其柱结构、比表面积、热稳定性均有较大影响.Fe/Al<0.5时,层间柱主要呈现Keggin 结构,Fe/Al≥0.5时,可能为三聚结构.随Fc/Al 比的增加,d(001)值,比表面面、热稳定性逐渐下降.A series of Hydroxy-Fe-Al Pillared Clays(FeAl-PILC)containing mixed-metalcomplexes with various Fe/Al ratios were prepared by two methods.The structure ofthe pillaring solution was studied by ^(27)Al-NMR,UV,ESR.The structure and ther-mal stability of the pillared clays were determined by XRD,DTA,UV-DRS.Theresults suggest that the basal spacings are 1.98—1.55nm.The pillaring structure,surface area and thermal stability of FeAl-PILC are greatly affected by Fe/Al ratiosin pillaring solution,FeAl-PILC products with Fe/Al ratio<0.5 have the pillaringstructure the pillaring structure similar to that of Al-PILC,but FeAl-PILC productswith Fe/Al ratio≥0.5 have the pillaring structure similar to that of Fe-PILC.Thebasal spacings,surface area and thermal stability decrease with increasing of Fe/Alratio.

关 键 词：柱撑粘土 表征 稳定性 催化剂 

分 类 号：O643.36[理学—物理化学]