铁铝复合柱撑粘土的制备、酸性与表征(Ⅱ)  

PREPARATION,CHARACTERIZATION AND SURFACE ACIDITY OF HYDROXY-Fe-Al PILLARED CLAYS CONTAINING MIXED-METAL COMPLEXES(Ⅱ)

作　　者：赵东源[1] 杨亚书[1] 郭燮贤[1] 陈恒荣[1] 辛勤[1] 王国甲[2] 

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

出　　处：《物理化学学报》1993年第3期336-344,共9页Acta Physico-Chimica Sinica

摘　　要：用UV-DRS、Mssbauer 谱、XPS、程序升温还原(TPR)等技术对新型铁铝复合柱撑粘土(FeAl-PILC)进行了表征,用IR、吡啶吸附IR、正丁胺吸附-TPD 手段,考察了其表面羟基和酸性.结果表明,层间柱铁铝聚合物中铁-铝间存在着相互作用.Fe/Al 比<0.5时,相互作用强,铁的分散度大,难还原.Fe/Al≥0.5时,相互作用较弱,易还原,焙烧后易生成α-Fe_2O_3s.随Fe/Al的增加,其表面酸性逐渐减弱.Hydroxy-Fe-Al Pillared Clays (FeAl-PILC)containing mixed-metal complexeswith various Fe/Al ratios were characterized by UV-DRS,M(?)ssbauer spectrascopy,XPS,TPR measurement.The surface hydroxyl and acidity were determined by IR,Py-IR and TPD.The results have shown that iron in the pillars relatively strongerinteracts with alumina in the pillars than with silica of interlayer.The interaction isstronger in FeAl-PILC with Fe/Al ratio<0.5 than that with Fo/Al ratio>0.5.Thesurface acidity is decreased with increasing of Fe/Al ratio.

关 键 词：柱撑粘土 表征 酸性 铁铝聚合物 

分 类 号：O634.32[理学—高分子化学]