2018年2月
Seed-directed synthesis of zincoaluminosilicate MSE-type zeolites using co-precipitated gels with tetraethylammonium hydroxide as a simple organic structure directing agent
MICROPOROUS AND MESOPOROUS MATERIALS
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- 巻
- 257
- 号
- 開始ページ
- 272
- 終了ページ
- 280
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.micromeso.2017.08.032
- 出版者・発行元
- ELSEVIER SCIENCE BV
Simplified and efficient synthesis of MSE-type zeolites using tetraethylammonium hydroxide (TEAOH) is extended from aluminosilicate to zincoaluminosilicate by combining with co-precipitated gel technique. The direct crystallization of MSE-type zeolite could be realized from the synthesis gels containing co-precipitated gels which contained homogenously dispersed zinc and aluminum species with a Zn/(Zn + Al) ratio up to 0.4. The overall characterizations revealed that most of the zinc species were incorporated as a heteroatom, and created anionic charges in MSE framework. Based on the ion exchange characteristics of those samples, it is found that the most of introduced zinc species exhibited two anionic charges per atom, which is expected to be suitable sites for divalent-cation exchange. Since the sample prepared by using Zn/(Zn + Al) ratio of 0.2 (MSE-TEA(zn0.2)) remained stable after thermal treatment, Ni2+ exchange was applied to that sample. The results revealed that MSE-TEA(zn0.2) sample exhibited ion-exchange capacity superior to aluminosilicate MSE-TEA sample. Therefore, MSE-TEA(zn0.2) sample can be shown as a potential divalent-cation exchanger. In this contribution, it is demonstrated that the simplified synthesis path is a very effective, alternative way to synthesize multipore zeolites containing medium and large pores in the frameworks with different heteroatoms. (C) 2017 Elsevier Inc. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.micromeso.2017.08.032
- ISSN : 1387-1811
- eISSN : 1873-3093
- Web of Science ID : WOS:000418106600030