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题名: Synthesis of ultrafine zeolites by dry-gel conversion without any organic additive
作者: Hu, D.1, 2;  Xia, Q. -H.1, 2;  Lu, X. -H.1, 2;  Luo, X. -B.1, 2;  Liu, Z. -M.3
关键词: Inorganic compounds ;  Microporous materials ;  Nanostructures ;  Chemical synthesis ;  Crystal growth
刊名: MATERIALS RESEARCH BULLETIN
发表日期: 2008-12-01
DOI: 10.1016/j.materresbull.2008.01.008
卷: 43, 期:12, 页:3553-3561
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Materials Science, Multidisciplinary
研究领域[WOS]: Materials Science
英文摘要: ZSM-5, mordenite, cancrinite and Y zeolites were successfully crystallized by the dry-gel conversion (DGC) without any organic additive (or template), in which the crystal Particles of ZSM-5. mordenite and Y zeolite were well controlled in the range of Ultrafine size. With a molar ratio of SiO(2)/Al(2)O(3) <= 40, the pure ZSM-5 zeolite was obtained at 170 degrees C at the Na(2)O/SiCi(2) molar ratio <0.2, but the pure mordenite wits formed at 150 degrees C at the Na(2)O/SiO(2) molar ratio >0.25. When the dry-gel with a composition of 5.0Na(2)O:Al(2)O(3):5.0SiO(2) was crystallized at 140 degrees C for 24 h, pure cancrinite phase was obtained, TEM images showed that thus-crystallized zeolites consisted of ultrafine particles ranging 35-150 nm for ZSM-5, 50-200 nm for mordenite and 120-200 nm for zeolite Y, respectively. Different from ZSM-5. mordenite and cancrinite zeolites, the DGC synthesis of Y zeolite required more water in the dry-gel before crystallization. (C) 2008 Elsevier Ltd. All rights reserved.
关键词[WOS]: NUCLEATION PERIOD ;  CRYSTALLIZATION ;  TPA-SILICALITE-1 ;  NANOCRYSTALS ;  CRYSTALS
语种: 英语
WOS记录号: WOS:000261361900045
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140806
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Hubei Univ, Minist Educ, Key Lab Synth & Applicat Organ Funct Mol, Wuhan 430062, Peoples R China
2.Hubei Univ, Sch Chem & Chem Engn, Wuhan 430062, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Grp 803, Dalian 116023, Peoples R China

Recommended Citation:
Hu, D.,Xia, Q. -H.,Lu, X. -H.,et al. Synthesis of ultrafine zeolites by dry-gel conversion without any organic additive[J]. MATERIALS RESEARCH BULLETIN,2008,43(12):3553-3561.
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