物理化学学报 >> 2003, Vol. 19 >> Issue (06): 487-491.doi: 10.3866/PKU.WHXB20030602

研究论文 上一篇    下一篇

微波诱导快速合成纳米NaY分子筛

程志林;晁自胜;万惠霖   

  1. 厦门大学化学系,固体表面物理化学国家重点实验室,厦门　361005
  • 收稿日期:2002-09-05 修回日期:2002-11-01 发布日期:2003-06-15
  • 通讯作者: 晁自胜 E-mail:zschao@jingxian.xmu.edu.cn

Nanosized NaY Zeolite Synthesized Rapidly by Microwave Induction

Cheng Zhi-Lin;Chao Zi-Sheng;Wan Hui-Lin   

  1. State Key Laboratory for Physical Chemistry of Solid Surface,Department of Chemistry,Xiamen University,Xiamen　361005
  • Received:2002-09-05 Revised:2002-11-01 Published:2003-06-15
  • Contact: Chao Zi-Sheng E-mail:zschao@jingxian.xmu.edu.cn

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摘要： 报导了一种在常压回流微波加热条件下,可使合成的NaY分子筛晶粒尺寸减小至100 nm以下的方法.添加柠檬酸的晶化速率接近添加稀土离子的晶化速率,合成60 min后两者得到的NaY分子筛的晶粒度和硅铝比接近,约为40 nm和5.2,晶粒度小且硅铝比高于在相同条件下没有添加合成得到的NaY分子筛.微波合成的NaY分子筛的晶粒度明显小于常规相同配比所得样品的晶粒度且晶化时间明显缩短,充分证明了微波加热快速均匀且能够得到较小晶粒度的特点.

关键词: 微波诱导, 纳米, NaY分子筛, 稀土, 络合剂

Abstract: Nanosized NaY zeolite with crystal size below 100 nm was synthesized by microwave heating method under reflux.Crystallization rate for adding citric acid is close to that of adding rare earth ions(Ln3＋),and furthermore,synthetic NaY zeolites both possess close crystal size about 40 nm and SiO2/Al2O3 ratio(5.2),with which is smaller insize and higher in ratio than that of no adding synthesis under the same condition.Compared to crystal size of NaY zeolite synthesized by conventional heating with the same composition,crystal size synthesized by microwave heating is reduced and that crystallization time is shortened remarkably,which fully testify that the microwave heating possesses rapid and uniform as well as reducing crystal size characters.

Key words: Microwave induction, Nanometer, NaY zeolite, Rare earth, Complexing agent