| Al2O3-TiO2二元氧化物的制备条件对酸性的影响 |
| THE INFLUENCE OF PREPARATION CONDITIONS OF Al2O3-TiO2 UPON ACID SITES PROPERTIES |
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| 摘要: 用两种方法制备了Al2O3-TiO2二元氧化物。经不同温度焙烧后，用Hammett指示剂滴定法、吡啶吸附IR法、正丁胺——TPD法对其表面酸性质进行了测定。结果表明：随着Al2O3含量增加，Al2O3-TiO2二元氧化物的总酸量、酸强度和L酸比例都增加；随着焙浇温度的增大，总酸量下降，L酸比例和酸强度较大的酸量、百分数则增加。 |
| 关键词: Al2O3-TiO2二元氧化物 酸量 酸强度 酸中心性质 |
| 基金项目: |
| Abstract: Al2O3-TiO2 binary oxide were prepared by two methods and calcinated at different temperature, its surface acid properties were determinated by Hammett indicator methods, n-butylamine-TPD and Py-IR. Results showed that the total amounts of acid sites, the acid strength and the proportion of L acid sites increased with increasing the content of Al2O3. As the calcination temperature increased, the total amounts of acid sites decreased, however the proportion of L acid sites increased, and the percentage of acid sites of binary oxide which had higher acid strength increased as well. |
| Keywords: Al2O3-TiO2 binary oxide amounts of acid sites acid strength acid sites protperty |
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| 摘要点击次数: 1630 |
| 全文下载次数: 1862 |
| 朱建飞,朱毅青.Al2O3-TiO2二元氧化物的制备条件对酸性的影响[J].无机化学学报,1999,15(4):429-434. |
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