高等学校化学学报

高等学校化学学报 ›› 1986, Vol. 7 ›› Issue (7): 613.

• 研究论文 • 上一篇    下一篇

用XPS研究几种沸石的表面组成

孟中岳   

  1. 南京大学化学系
  • 收稿日期:1985-01-09 出版日期:1986-07-24 发布日期:1986-07-24

A XPS Study of the Surface Composition of Zeolites

Meng Zhongyue   

  1. Department of Chemistry, Nanjing University, Nanjing
  • Received:1985-01-09 Online:1986-07-24 Published:1986-07-24

PDF (PC)

被引次数

2

摘要： 本文用XPS研究Y、USY和ZSM-5沸石的表面组成,结果表明:沸石的表面组成(Al/Si)s与其体相(Al/Si)b原子比及其骨架Al在晶格中结合强弱有关。Y和载NiY沸石表面层缺Al,USY和ZSM-5沸石表面高度Al富集。在300—600℃加热载NiHY沸石,不伴有Al的移去,结果显示出沸石表面明显缺Al。

Abstract: In the present paper,we extended these studies of the surface composition of Y,USY,and ZSM-5 zeolites using XPSmethod.The results show that the surface composition (Al/Si) of Y,USY,and ZSM-5 zeolites depend on both that of the bulk and the framwork aluminum strongly or weakly linked in the lattice.The surface layers of Yand Ni-containing Yzeolites are partially deficient in Al.The surface layers of USYand ZSM-5 zeolites are more rich in that element.Again,heating of the NiHYat 300-600℃without the Al removed,gave the results indicating that the surface deficient in Al may be more obvious.

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