摘要
应用Ｘ射线衍射（ＸＲＤ）、酸碱滴定，激光拉曼（ＬＲＳ）和紫外漫反射（ＵＶ－ＤＲＳ）等方法对磷钨酸（ＰＷ_（１２））与γ－Ａｌ_２Ｏ_３的相互作用及其在γ－Ａｌ_２Ｏ_３上的铺展状态进行了研究。结果表明：在单层铺展时，磷钨酸与γ－Ａｌ_２Ｏ_３存在不可逆的强相互作用，但其Ｋｅｇｇｉｎ结构仍保持稳定，随负载量的增加，ＰＷ_（１２）在γ－Ａｌ_２Ｏ_３表面上依次以单层，一级结构，二级结构形式铺展。
The interaction between PW_(12)and γ-alumina and the disperse state of PW12 on γ-alumina have been studied by XRD,acid-base titration, LRS and UV-DRS methods.It is found that there is an irreversible strong interaction between monolayer PW_(12)and γ-alumina,but the Keggin structure of monolayer PW_(12)remains to be stable. With increase of the loading, three different disperse states namely the monolayer PW_(12),the primary structure and the secondary structure of PW_(12) appear successively on the surface of γ-alumina.
出处
《分子催化》
EI
CAS
CSCD
1995年第2期139-144,共6页
Journal of Molecular Catalysis(China)
