新型层柱微孔材料──FeW_（11）NiO_（39）柱撑ZnAl阴离子粘土的合成、表征及催化性能

Synthesis,Characterization and Catalytic Activity of New Layered Microporous Material-FeW_(11)NiO_(39)Pillared Anion Clay

采用水热合成与离子交换方法，将中心原子为过渡金属（Ｆｅ）的钨系过渡金属取代型杂多阴离子ＦｅＷ_（１１）ＮｉＯ_（３９）（Ｈ_２Ｏ）￣（７－）（缩写为ＦｅＷ_（１１）Ｎｉ）嵌入ＺｎＡｌ型阴离子层状结构粘土间，获得了大层间距、通道高度达１．３２ｎｍ的新型层柱微孔化合物。通过ＸＲＤ、ＩＲ及ＥＳＲ等手段进行了表征。以ＺｎＡｌ－Ｆｅｗ_（１１）Ｎｉ为催化剂合成邻苯二甲酸二辛酯（ＤＯＰ），选择性大于９９％，转化率由嵌入前的１２％提高到近５０％，催化活性明显提高。

Layered double hydroxides pillared by tungstoferrate heteropolyanion with substituted transition metal Ni, ZnAl-FeW_(11)Ni, has been synthesized by means of hydrothermal ion exchange method. Powder X-ray diffraction shows that the anionic clay precursor possesses a regular layered structure and a good crystallinity, and the pillared derivative has 2θof 4. 96°and gallery height of 1. 325 nm. IR spectra indicate that the vibrational frequency and band shape of heteropolyanion existing in the layered regions of anionic clay are similar to those of the authentic heteropoly salt. So we can draw the conclusion that the Keggin structure of the gallery heteropoly anions is maintained. ESR results indicate that the heteropolyainons are of ordered arrangement in layered clay region.Tests show that the new pillared compound has a higher catalytic activity than that of anionic clay and heteronoly salts for dioctyl phthalate synthesis.