| 丝光型Si-Fe沸石表面酸碱性的研究 |
| STUDY ON ACIDITY AND BASICITY OF Si-Fe MORDENITE ZEOLITE |
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| 摘要: 本文藉助红外光谱(IR)、程序升温脱附—质谱(TPD—MS)等手段研究了丝光型Si—Fe沸石分子筛表面的酸碱性质.结果表明:丝光沸石骨架中的铝原子被铁原子取代以后,其表面酸性大为减弱,但其碱性相对增强,Si—Fe沸石分子筛大部分表面羟基的酸性很弱,仍有一定量的L酸中心存在于沸石的表面上. |
| 关键词: 杂原子分子筛 酸碱性 红外光谱 程脱 |
| 基金项目: |
| Abstract: By means of infrared(IR)and temperature-programmed desorption-mass spectroscopy(TPD-MS), the surface acidity and basicity of Si-Fe mordenite zeolite was studied. Results showed that the acidity of Si-Fe zeolite was decreased acidity of surface hydroxy(-OH)is very weak, whereas the basicity of the zeolite was relatively increased, after aluminium atoms were replaced by iron atoms. Also, it was found that there were a few Lewis acid centres on the zeolite surface. |
| Keywords: hetero-atom molecular sieve acidity and basicity IR TPD |
| 投稿时间：1986-12-31 |
| 摘要点击次数: 1308 |
| 全文下载次数: 1888 |
| 余有禄,丁莹如.丝光型Si-Fe沸石表面酸碱性的研究[J].无机化学学报,1987,3(3):99-105. |
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