Mechanism on solvent-free crystallization of NaA zeolite
文献类型：期刊论文
| 作者 | Meng, Xiangju2; Xiao, Yuchen2; Sheng, Na2; Chu, Yueying3; Wang, Yeqing2; Wu, Qinming2; Liu, Xiaolong3; Deng, Feng3; Feng, Zhaochi1 |
| 刊名 | MICROPOROUS AND MESOPOROUS MATERIALS
 |
| 出版日期 | 2017 |
| 卷号 | 237页码:201-209 |
| 关键词 | Naa Crystallization D4r Al-27 2d Mqmas Nmr Technique Uv-raman |
| ISSN号 | 1387-1811 |
| DOI | 10.1016/j.micromeso.2016.09.029 |
| 文献子类 | Article |
| 英文摘要 | It is of great importance to deeply understand the crystallization mechanism of zeolite in both fundamental research and industrial applications. Here we have systemically investigated the crystallization of zeolite NaA using hydrated silica (SiO2 center dot 3H(2)O) and sodium aluminate solids in the absence of water solvent, which is well characterized by X-ray diffraction (XRD), scanning electron micrography (SEM), UV-Raman, and Al-27 MQMAS and Si-29 MAS NMR techniques. The XRD patterns show that the complete crystallization requires for 5 h at 80 degrees C. The SEM images suggest that the nucleation mainly occurs on the surface of solid particles. The UV-Raman spectra exhibit that a large amount of the zeolite building units of four-membered rings (4R) formed in the starting solid particles, which even occurs before the crystallization, while crystal growth is always along with the formation of zeolite building units of six membered rings (6R). The Al-27 2DMQMAS NMR spectra show that the D4R species are dominant in the precursors for crystallization of NaA. According to these results, we believe that the rearrangement of zeolite building units such as aluminosilicate D4R plays a critical role for the crystallization of zeolite NaA in the absence of water solvent. (C) 2016 Elsevier Inc. All rights reserved. |
| WOS关键词 | SOLID-STATE NMR ; ALUMINOPHOSPHATE MOLECULAR-SIEVES ; ATOMIC-FORCE MICROSCOPY ; LEWIS-ACID CATALYSTS ; DRY-GEL CONVERSION ; LTA ZEOLITE ; HYDROTHERMAL SYNTHESIS ; CRYSTAL-GROWTH ; MAS-NMR ; NUCLEATION |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000387836100022 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/169710]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Meng, Xiangju; Feng, Zhaochi |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Zhejiang Univ, Dept Chem, Hangzhou 310028, Zhejiang, Peoples R China 3.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, Xiangju,Xiao, Yuchen,Sheng, Na,et al. Mechanism on solvent-free crystallization of NaA zeolite[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2017,237:201-209. |
| APA | Meng, Xiangju.,Xiao, Yuchen.,Sheng, Na.,Chu, Yueying.,Wang, Yeqing.,...&Feng, Zhaochi.(2017).Mechanism on solvent-free crystallization of NaA zeolite.MICROPOROUS AND MESOPOROUS MATERIALS,237,201-209. |
| MLA | Meng, Xiangju,et al."Mechanism on solvent-free crystallization of NaA zeolite".MICROPOROUS AND MESOPOROUS MATERIALS 237(2017):201-209. |
入库方式： OAI收割
来源：大连化学物理研究所
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