摘要
以硝酸根型水滑石做交换前驱体,通过离子交换法合成了过度金属离 子一、三取代Keggin结构过氧钨磷杂多阴离子柱撑水滑石Zn_2Al(OH)_6-[PW_(11)(TiO_2)O_(39)]·Zn_2Al(OH)_6-[PW_9(TiO_2)_3O_(37)],用元素分析、X-射线粉末衍射(XRD)、红外光谱(IR)、X-光电子能谱(XPS)等手段对产物的组成和结构进行了表征。结果表明,过氧杂多阴离子进入水滑石层间,使水滑石的层间距从0.92 nm增加到1.47nm。过氧杂多阴离子中的O_2^(2-)离子没有被破坏。
Pillared layered double hydroxide (LDH) ,Zn2Al (OH)6-PWH (TiO,) O39 and Zn2A1(OH)6~PW9(TiO2)3O37 were synthesized by direct ion-exchange reaction in aqueous solution, and were characterized by elemental analysis, XRD, ID and XPS spectra. The interlayer spaces of the pillared products increase from 0. 92 nm to 1. 47 nm with the peroxoheteropolyanions entering hydrotalcose gallery . The results from IR,X-ray and XPS showed that the structure peroxoheteropolyanion O|~is well maintained.
基金
国家自然科学基金资助课题
关键词
过氧杂多阴离子
柱撑水滑石
合成与表征
peroxoheteropolyanion
pillared hydrotalcite
synthesis and characterization
