Keggin型P-V-Mo-W四元杂多酸的合成及表征  

Studies on Synthesis and Characterization of Keggin-Type P-V-Mo-W Heteropolyacid

作　　者：尹彦冰[1] 宋瑶[1] 金铭涵 杨晓英[1] 

机构地区：[1]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006

出　　处：《昆明理工大学学报（自然科学版）》2014年第2期97-100,共4页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：黑龙江省普通高校新世纪优秀人才培养计划项目(1154-NCET-014);黑龙江省普通高等学校青年学术骨干支持计划项目(1153G052)

摘　　要：采用分步酸化、乙醚萃取的方法合成了一系列具有P、V原子数1∶1的Keggin结构的P-V-Mo-W四元杂多酸H4PVMoxW11-xO40·nH2O(其中,x=1,2,3,4),采用红外光谱、X射线衍射以及热重等方法对合成的杂多酸的结构进行了表征.结果发现,在红外光谱中随着钨原子数的增多,相应的特征峰出现蓝移现象;由XRD表征了杂多酸的二级和三级结构,在四个相关区间都表现出Keggin结构杂多阴离子所具有的特征衍射峰;通过TG计算出杂多酸中结晶水数目.In this paper,the Keggin-type P-V-Mo-W heteropolyacids with different numbers of W,Mo at-om are synthesized by methods of acidizing step-by-step and ether extraction,which are subsequently charac-terized by IR,XRD and TG.The results show that in IR the corresponding characteristic peak has a phenomenon of blue shift with the increasing of the numbers of wolfram atom.With the adoption of XRD,the secondary and tertiary structures of heteropolyacids are characterized and characteristic diffraction peaks of Keggin-type hetero-poly anion are shown in four related intervals.The numbers of crystal water are calculated by TG.

关 键 词：磷钒钼钨杂多酸 KEGGIN结构 合成 表征 

分 类 号：O611.6[理学—无机化学]