科研之友
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摘要
The V(V)-promoting SO42-/ZrO2 solid superacid samples were prepared by the method of ageing at a low temperature. The acidities of the samples were determined with flow indicator method, and the characterizations of the samples were performed by IR, XRD and XPS. The samples were used in the esterification of acetic acid and glycerol. The results show that the catalysts calcined at 600-650 degrees C and aged at a low temperature have a better performance comparing with other sample's aged at ambient temperature the flexible vibration peak of S=O bond was strengthened remarkably in IR spectra, XRD patterns of aged samples at a low temperature and containing V(V) additive indicate that metastable ZrO2 cubic crystals formed which were baked at 600-650 degrees C. The peak position of Zr-3d a bigger chemical shift in XPS patterns.
- 出版日期2006-6
- 单位安徽工业大学
