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吡咯-IR法测定铝化β沸石的碱性 被引量：1

Basicities of Aluminated Zeolites β:An FTIR Study of Chemisorbed Pyrrole
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摘要 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 βto 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. 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 βto 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.
作者 杨春 王建 须沁华
机构地区 南京大学化学系
出处 《物理化学学报》 SCIE CAS CSCD 北大核心 1997年第10期957-960,共4页 Acta Physico-Chimica Sinica
关键词 吡咯-IR法 碱性 铝化β沸石 沸石 Pyrrole probe, FTIR, Basicity, Zeolite β, Alumination
分类号 O643.36 [理学—物理化学]
  • 相关文献

参考文献3

  • 1杨春,须沁华.β沸石的铝化[J].物理化学学报,1996,12(12):1057-1060. 被引量：5
  • 2Yang C，J Chem Soc Faraday Trans，1997年，93卷，8期，1675页
  • 3Huang M，J Chem Soc Faraday Trans，1992年，88卷，751页

二级参考文献3

  • 1Liu X，Zeolites，1992年，12卷，8期，936页
  • 2Zhang Z，Zeolites，1991年，11卷，3期，232页
  • 3徐如人，沸石分子筛的结构与合成，1987年

共引文献4

同被引文献18

  • 1蒋绍亮,宋英俊,章福祥,武光军,关乃佳.高氮含量MCM-41的制备及其对Knoevenagal缩合反应的催化性能[J].催化学报,2006,27(6):495-500. 被引量：3
  • 2Narasimharao K, Hartmann M ,Thiel H H ,et al.Novel solid basic catalysts by nitridation of zeolite beta at low temperature [J]. Microporous Mesoporous Mater.,2006,90 ( 1 ) : 377-353.
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  • 8Xiong J M, D Y J,Zhu H J,et al.Nitrogen-Incorporated SAPO-11 Molecular Sieve:Synthesis, Characterization,and Properties[J].J. Phys.Chem.B, 2003,107 : 1366-1369.
  • 9Zhang C M, Xu Z, Wan K S, et al.Synthesis, characterization and catalytic properties of nitrogen-incorporated ZSM-5 molecular sieves with biomodal pores [J ].Appl.Catal.A -Gen., 2004,258 ( 1 ) : 55-61.
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物理化学学报
1997年 第10期

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