OALib Journal期刊
ISSN: 2333-9721
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介孔硅担载磷钨杂多酸催化剂的制备及其对环戊烯氧化反应的催化性能
DOI: 10.1016/S1872-2067(10)60236-7, PP. 1191-1198
Keywords: 杂多酸,环戊烯,戊二醛,选择性氧化,SBA-15
Abstract:
?采用离子交换法将Keggin型12-磷钨杂多酸负载到表面胺基化的介孔SBA-15分子筛上,并利用X射线衍射、N2吸附-脱附、傅里叶变换红外光谱、X射线光电子能谱和热重分析等手段对催化剂进行了表征.结果表明,所制备催化剂具有SBA-15分子筛的有序六方孔道结构,负载后的磷钨杂多酸的Keggin结构未遭到破坏.所制备催化剂对以过氧化氢为氧化剂的环戊烯氧化反应具有很高的催化活性,环戊烯转化率可达100%,戊二醛选择性可达81%.催化剂具有较高的稳定性,重复使用5次后,其催化活性没有明显下降.
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