摘要
在室温至４５０℃范围内，考察了Ｈ３ＰＷ１２Ｏ４０·２９Ｈ２Ｏ的受热相变情况．结果表明，杂多酸中所含沸石水和结晶水很容易失去，且失水程度与其所处环境有关．以ＩＲ、ＴＧ－ＤＴＡ、ＸＲＤ以及ＳＥＭ等表征了不同含水量的杂多酸，表明其晶体结构及外观均因失水而发生了相应的变化．
おhe thermally induced transformations of 12tungstophosphoric acid in the temperature range from ambient temperature to 450℃ were investigated and characterized by IR, DTA, XRD and SEM. Results showed that zeolite water and crystal water were easily lost and the extent of dehydration depended on the temperature and moisture of the environment of HPW12.
出处
《分子催化》
EI
CAS
CSCD
北大核心
1998年第1期31-35,共5页
Journal of Molecular Catalysis(China)
关键词
杂多酸
相变
脱水
磷钨杂多酸
催化剂
Heteropolyacid, Tungstophosphoric acid, Phase transformation, Dehydration
