| SiO2与Keggin杂多酸相互作用的研究 |
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| 引用本文： | 陈霄榕,李永丹,康慧敏,张继炎,张鎏.SiO2与Keggin杂多酸相互作用的研究[J].分子催化,2002,16(1):60-64. |
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| 作者姓名： | 陈霄榕 李永丹 康慧敏 张继炎 张鎏 |
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| 作者单位： | 天津大学,化学工程学院,碳一化工国家重点实验室,催化科学与工程系,天津,300072 |
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| 摘 要： | 采用经典酸化与乙醚萃取相结合的方法，制备了Keggin型杂多酸H3PMo12O40，并以SiO2为载体制备了经不同温度焙烧的负载型杂多酸样品，利用TG、DTA、IR、XPS、NH3－TPD等手段，对负载前后的杂多酸样品进行了表征；考察了SiO2与杂多酸之间的相互作用以及载体对杂多酸酸性的影响，研究发现，SiO2载体的引入，可以有效改善杂多酸的热稳定性，焙烧温度的升高，会显著降低杂多酸的酸性，并提出SiO2杂多酸的相互作用方式。
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| 关 键 词： | 杂多酸 酸性 热稳定性 相互作用 二氧化硅 Keggin结构 负载型催化剂 表征 |
| 文章编号： | 1001-3555(2002)05-0060-05 |
| 修稿时间： | 2001年4月6日 |
Investigation of Interaction between SiO2 and Keggin Heteropolyacids |
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| CHEN Xiao\|rong,LI Yong\|dan,KANG Hui\|min,ZHANG Jin\|yan,ZHANG Liu.Investigation of Interaction between SiO2 and Keggin Heteropolyacids[J].Journal of Molecular Catalysis (China),2002,16(1):60-64. |
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| Authors: | CHEN Xiao\|rong LI Yong\|dan KANG Hui\|min ZHANG Jin\|yan ZHANG Liu |
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| Abstract: | A conventional acidification method incorporated with an ether extraction technique was used to prepare H\-3PMo\-\{12\}O\-\{40\} with Keggin structure. Silica supported heteropoly acids(HPA) were prepared at different calcination temperatures. The unsupported and supported HPA were characterized by TG, DTA, IR, XPS and NH\-3\|TPD techniques. The influence of SiO\-2 on HPA acidity and the interaction between SiO\-2 and HPA were investigated. It was found that the support SiO\-2 improves the thermal stability of HPA, and the increase of calcination temperature obviously lowers the HPA acidity. An interaction modle between SiO\-2 and HPA is proposed. |
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| Keywords: | Heteropolyacids Acidity Thermal stability Interaction |
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