Synthesis and characterization of hierarchical Y zeolites using NH4HF2 as dealumination agent
文献类型：期刊论文
| 作者 | Feng, Aihu; Yu, Yang; Mi, Le; Cao, Yunzhen; Yu, Yun; Song, Lixin |
| 刊名 | MICROPOROUS AND MESOPOROUS MATERIALS
 |
| 出版日期 | 2019-05-15 |
| 卷号 | 280页码:211 |
| 关键词 | NH4HF2 Hierarchical Y zeolites Dealumination Toluene adsorption |
| ISSN号 | 1387-1811 |
| DOI | 10.1016/j.micromeso.2019.01.039 |
| 文献子类 | Article |
| 英文摘要 | In this work, the hierarchical Y zeolites are firstly obtained by etching NaY zeolites with different NH4HF2 solutions. The morphology and microstructure, toluene adsorption property of as-prepared hierarchical Y zeolites are characterized. The results demonstrate that the mesoporous number and size, the n(SiO2)/n(Al2O3) value of hierarchical Y are increased with NH4HF2 concentration. The 0.3M NH4HF2-etched NaY exhibits satisfactory crystallinity, suitable mesoporous content and better toluene adsorption performance. The NH4HF2-etched NaY is an excellent material for pressure swing adsorption. Furthermore, the synthesis mechanism of hierarchical Y has been elaborately demonstrated. The synergistic effect of H+ and F- is beneficial to deal-umination as well as the introduction of mesoporous. The NH4HF2 ionizes into positive H+ and negative F- at a very slow rate, which avoids the concentration of H+ and F- going up suddenly. Under the circumstances, the dealumination reaction between NH4HF2 and NaY zeolites is more sustained and mild, and the crystallinity of hierarchical Y zeolites is higher than that of the HCl/NH4F-etched or HF/NH4F-etched NaY. This work presents an effective method to synthesize the hierarchical Y zeolites. |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27116]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Feng, Aihu,Yu, Yang,Mi, Le,et al. Synthesis and characterization of hierarchical Y zeolites using NH4HF2 as dealumination agent[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2019,280:211. |
| APA | Feng, Aihu,Yu, Yang,Mi, Le,Cao, Yunzhen,Yu, Yun,&Song, Lixin.(2019).Synthesis and characterization of hierarchical Y zeolites using NH4HF2 as dealumination agent.MICROPOROUS AND MESOPOROUS MATERIALS,280,211. |
| MLA | Feng, Aihu,et al."Synthesis and characterization of hierarchical Y zeolites using NH4HF2 as dealumination agent".MICROPOROUS AND MESOPOROUS MATERIALS 280(2019):211. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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