物理化学学报 >> 2006, Vol. 22 >> Issue (01): 28-32.doi: 10.3866/PKU.WHXB20060106

研究论文 上一篇    下一篇

杂原子(B、Ti、Fe)进入Y型分子筛骨架的表征

鞠雅娜; 沈志虹; 赵佳; 赵俊桥; 王秀林   

  1. 石油大学(北京)中国石油天然气集团公司催化重点实验室, 北京 102249
  • 收稿日期:2005-05-27 修回日期:2005-07-12 发布日期:2006-01-15
  • 通讯作者: 沈志虹 E-mail:shenzhi@cup.edu.cn

Characterization of Framework Hetero-atom (B, Ti, Fe) in Y-type Zeolite

JU Yan-a; SHEN Zhi-hong; ZHAO Jia; ZHAO Jun-qiao; WANG Xiu-lin   

  1. Key Laboratory of Catalysis of CNPC, China University of Petroleum, Beijing 102249, P. R. China
  • Received:2005-05-27 Revised:2005-07-12 Published:2006-01-15
  • Contact: SHEN Zhi-hong E-mail:shenzhi@cup.edu.cn

摘要: 应用X射线粉末衍射(XRD)、傅立叶变换红外光谱(FT-IR)、固体核磁共振(NMR)、紫外可见漫反射(UV-Vis-DRS)和热重(TG)等多种表征方法对合成的杂原子Y分子筛(BY、TiY、FeY)的结构进行了表征. 根据引入杂原子后分子筛的晶胞常数、骨架伸缩振动吸收峰、杂原子的特征电子跃迁峰、还原的热重曲线以及杂原子所处的微观配位环境等多种性质的变化, 得出结论:杂原子B、Ti、Fe均已进入Y分子筛骨架.

关键词: 杂原子, Y型分子筛, 骨架, 表征

Abstract: The structure and properties, such as the unit cell parameters, framework vibration bands, characteristic electronic transition, deductibility of heteroatom-containing Y zeolites, were investigated by XRD, FT-IR, UV-Vis-DRS, TG, and NMR. It showed that suitable hetero-atom incorporation into the zeolite framework does not change the crystallographic form of zeolite Y. The unit cell of zeolite BY is shrinked and the framework vibration bands shift to higher frequency comparing with zeolite Y. The unit cell sizes of zeolite TiY and FeY are increased and framework vibration bands shift to lower frequency. The 11B MAS-NMR shows that atom B is in the tetrahedral position of the framework, which differs from zeolite Y impregnated boron. UV-Vis-DRS spectra suggest that atom Ti in zeolite TiY differs from extra atom Ti evidently and the zeolite FeY reduced by hydrogen at 600 ℃ does not have reduction peaks, but zeolite Y impregnated Fe is reduced completely at the same conditions. The results suggest that the hetero-atoms, B, Ti, and Fe, all enter the framework of zeolite Y.

Key words: Hetero-atom, Zeolite Y, Framework, Characterization