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OALib Journal期刊
ISSN: 2333-9721
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keggin型硅取代钨钴酸盐[coⅲw11o40(sioh)2]5-的合成和表征
, PP. 48-52
Keywords: 钨钴酸盐,硅取代,keggin结构,合成与表征
Abstract:
以coⅲw11和teos为原料,在乙醇-水混合溶剂中首次合成了keggin型硅取代的钨钴酸盐[coⅲw11o40(sioh)2]5-.用ir、uv-vis、tg-dta和元素分析技术对样品进行了结构和组成表征.表征结果显示,两个sioh基团进入了coⅲw11的空位,并形成了si-o-si桥,产物的对称性介于饱和与缺位结构之间.同时,考察了反应条件对合成产物的影响.结果表明,ph和乙醇-水的配比对合成产物的影响很大.酸度与醇用量须有一个合适的匹配,只有在ph=1,vetoh:vh20=2:1的条件下,才能得到高产率和高纯度的产物.
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