CsxH3-xPW12O40的孔结构

Ｎ２静态吸附容量法的测定结果表明，磷钨酸铯盐（ＣｓｘＨ３－ｘＰＷ１２Ｏ４０）的孔窝和孔分布与ｘ值的大小相关。ｘ〈１．５的ＣｓｘＨ３－ｘＰＷ１２Ｏ４０孔容相近，孔分布近似；当ｘ〉１．５时，ＣｓｘＨ３－ｘＰＷ１２Ｏ４０的孔主要是孔径小于１０ｎｍ的中孔和微孔，平均孔径及孔容随ｘ的增加而增大。ＳＥＭ和ＴＥＭ的观测结果表明，ＣｓｘＨ３－ｘＰＷ１２Ｏ４０的孔是微细粒子堆积留下的空隙孔，可能不存在晶内孔。

PORE STRUCTURE OF Cs x H 3- x PW 12 O 40

The properties of pore structure of Cs x H 3- x PW 12 O 40 have been investigated by N 2 adsorption, SEM and TEM. The results determined by N 2 adsorption showed that the pore volume and pore distribution of Cs x H 3- x PW 12 O 40 are similar when x <1 5. When x >1 5, the pores are mainly composed of medi pores and micro pores whose pore diameters are smaller than 10 nm, and their pore diameters vary directly as the content of Cs in Cs x H 3- x PW 12 O 40 increases. According to the results measured by TEM and SEM, it was assumed that the pores of Cs x H 3- x PW 12 O 40 are composed of mesopores which come from the space between fine particles and that there are no intrinsic micro pores in their crystal structure.