柱撑阴离子粘土的合成、表征及催化性能研I．ZnAl─SiW_（11）及ZnAl—SiW_（11）Z的合成

STUDY ON SYNTHESIS,CHARACTERIZATION AND CATALYSIS OF PILLARED ANION CLAY I. SYNTHESIS OF ZnAl-SiW_(11) AND ZnAl-SiW_(11)Z

采用水热合成及离子交换方法将缺位及单取代型Ｋｅｇｇｉｎ结构钨硅杂多含氧酸根ＳｉＷ（１１）及ＳｉＷ（１１）Ｏ（３９）Ｚ（Ｈ２Ｏ）（６－）嵌入Ｚｎ─Ａｌ型阴离子粘土层间，得到了大层间距的新型层往状微孔材料ＺｎＡｌ─ＳｉＷ（１１）及ＺｎＡｌ—ＳｉＷ（１１）Ｚ（Ｚ＝Ｃｏ（２＋）、Ｎｉ（２十）和Ｃｕ（２＋）），ＸＲＤ与ＩＲ测试结果表明，它们只有９．７ 的通道高度．

ayered double hydrotalcites pillared by heteropolyoxometates,ZnAl-SiW(11)and ZnAl-SiW(11)Z(Z = Co(2+),Ni(2+)and Cu(2+)) have been synthesized via both hydrothcrmal reaction and anion exchange. A procedure for intcrcalation layered double hydroxidcs is described:powder X-ray diffraction,IR and thermogravimmctric mcasurcmcnts confirm that for SiW(11) and SIiW(11)Z intcrcalation takes place and results in gallery heights of 9.7A.