引用本文:
杨春, 王建, 须沁华. 吡咯-IR法测定铝化β沸石的碱性[J]. 物理化学学报,
1997, 13(10): 957-960.
doi:
10.3866/PKU.WHXB19971020
Citation: Yang Chun, Wang Jian, Xu Qin-Hua. Basicities of Aluminated Zeolites β:An FTIR Study of Chemisorbed Pyrrole[J]. Acta Physico-Chimica Sinica, 1997, 13(10): 957-960. doi: 10.3866/PKU.WHXB19971020
Citation: Yang Chun, Wang Jian, Xu Qin-Hua. Basicities of Aluminated Zeolites β:An FTIR Study of Chemisorbed Pyrrole[J]. Acta Physico-Chimica Sinica, 1997, 13(10): 957-960. doi: 10.3866/PKU.WHXB19971020
English
Basicities of Aluminated Zeolites β:An FTIR Study of Chemisorbed Pyrrole
Abstract:
The basicities of aluminated zeolites βhave been investigated by FTIR spectra of chemisorbed pyrrole. The NH-stretching frequency of pyrrole adsorbed on the samples shifts towards lower wavenumber as the St/Al ratio is decreased and correlates well with the negative charge on the framework oxygen calculated from the Sanderson electronegativity equalization principle, revealing zeolite β to possess a stronger overall basicity after alumination and, therefore, the alumination to be an effective method to improve the basicity. It is also found that the heterogeneity of basic strength occurs and some stronger basic sites appear after alumination.
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Key words:
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Pyrrole probe
- / FTIR;Basicity
- / Zeolite β
- / Alumination
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