摘要
利用激光拉曼光谱（ＬＲＳ）研究了Ｎａ２Ｏ修饰Ａｌ２Ｏ３担载的钼酸铵的热分解，对烘干和焙烧Ｍｏ／Ａｌ２Ｏ３样品分别用激光拉曼光谱进行了表征。实验发现，载体表面的酸碱性对钼酸铵的热分解和相转变有显著影响。随着Ｎａ２Ｏ担载量的增加，Ａｌ２Ｏ３担载钼酸铵前身物由多聚体转变为单齿体。
Laser Raman spectroscopy (LRS) have been applied to study thermal decomposition of ammonium molybdate supported on the Al 2O 3 carrier modified by Na 2O The dried and calcined Mo/Al 2O 3 samples have been characterized by LRS It is found that the surface acid-base properties of the carriers make a significant influence on the thermal decomposition and phase formation of the sipported ammonium molybdate Following the loading of Na 2O, the supported ammonium molybdete of the precursors exhibits the phase transformation from polymeric molybdenum species to monomeric molybdenum species, which are corresponded to the changes of thermal phenomena, and closely related to the formatios of the octahedrally and tetrahedrally coordinated molybdena species on the calcined samples with low and high Na 2O loadings, respectively
出处
《焦作工学院学报》
CAS
1997年第3期64-67,共4页
Journal of Jiaozuo Institute of Technology(Natural Science)
基金
河南省自然科学基金
关键词
NA2O
AL2O3
钼酸铵
热分解
相转变
激光拉曼光谱
Na 2O modified Al 2O 3
supported ammonium molybdate
thermal decomposition
phase formation
LRS
