文档介绍：摘要多金属氧酸盐(Polyoxometalates,POMs)TI≮仅具有丰富的拓扑结构,而且在催化、导电、吸附、光学材料、能量存储和主客体化学等领域中具有重要的应用价值。因此, 多金属氧酸盐及其衍生物的合成与性能研究成为近年来研究的重要方向之一。但由于其所具有的比表面积较小(<10m2/g)、热稳定性低、不易回收等缺陷,在催化领域的应用受到一定限制,如将多酸负载于载体表面则可以极大地改善多酸的催化性能。, 将磷钨酸负载到介孔载体上制备负载型的催化剂,并采用XRD、FT-IR、TEM和氮气吸附一脱附等手段对催化剂进行了表征。此外,以制备的负载型磷钨酸为催化剂,催化合成了香兰素1,。考察了该催化剂的催化活性,研究了原料摩尔配比、反应时间、带水剂用量、催化剂用量及磷钨酸负载量、催化剂循环使用次数等对产率的影响。结果表明, ,在最优条件下催化合成香兰素1,2. 丙二醇缩醛反应中香兰素1,%,%。关键词:负载;磷钨酸;催化;香兰素1,2一丙二醇缩醛;乙酸异戊酯 Studies on thePreparation,Characterization andCatalytic Property oftheSupported Phosphotungstic Acid Abstract The studies on thesynthesis andproperty ofpolyoxometalates have been an important fieldin recent years,not only because oftheirabundant structural types and topological novelty but alsodue totheirpotential application inthefields ofcatalysis,conductivity, absorption,optical material,storage of energy and host—guest chemistry,and SO on. However,the catalytic activitiesofthepolyoxometalates are greatly limited due totheir low surface areas and easy tolose addition,the polyoxometalates isdifficult toseparate from thereaction ,many attempts have been made toenhance thecatalytic activity of supported polyoxometalates have been prepared byincorporating thepoIyoxomeCaIates intoporous materials. Inthispaper,phosphotungstic acidihadbeen supported on the mesopore with lager surface area and high thermal supported catalysts were characterized by thethechniques ofFT-IR,XRD,TEM . In addition,we also investigate:d the catalytic activity of the supported phosphotungstic acid catalyst by thereaction of acid 1,2-propylene glycol acetal and iso。amyl acetate was synthesized by using supported phosphotungstic acid effectofthemolar ratioofthereactant,reaction time,the amount of water stripping agent and cataly