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Ultrasonic synthesis of silica-alumina nanomaterials with controlled mesopore distribution without using surfactants
Yao, N; Xiong, GX; Yeung, KL; Sheng, SS; He, MY; Yang, WS; Liu, XM; Bao, XH
刊名LANGMUIR
2002-05-14
DOI10.1021/la0116084
18期:10页:4111-4117
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
研究领域[WOS]Chemistry ; Materials Science
关键词[WOS]MOLECULAR-SIEVES ; CATALYSTS ; HYDROISOMERIZATION ; HYDROCRACKING ; OXIDATION ; MECHANISM
英文摘要A novel sol-gel process has been developed for the synthesis of amorphous silica-aluminas with controlled mesopore distribution without the use of organic templating agents, e.g., surfactant molecules. Ultrasonic treatment during the synthesis enables production of precursor sols with narrow particle size distribution. Atomic force microscopy analysis shows that these sol particles are spherical in shape with a narrow size distribution (i.e., 13-25 nm) and their aggregation during the gelation creates clusters containing similar sized interparticle mesopores. A nitrogen physiadsorption study indicates that the mesoporous materials containing different Si/Al ratios prepared by the new synthesis method has a large specific surface area (i.e., 587-692 m(2)/g) and similar pore sizes of 2-11 nm. Solid-state Al-27 magic angle spinning (MAS) NMR shows that most of the aluminum is located in the tetrahedral position. A transmission electron microscopy (TEM) image shows that the mesoporous silica-alumina consists of 12-25 nm spheres. Additionally, high-resolution TEM and electron diffraction indicate that some nanoparticles are characteristic of a crystal, although X-ray diffraction and Si-29 MAS NMR analysis show an amorphous material.
语种英语
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WOS记录号WOS:000175500300048
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被引频次:23[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/85719
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Hong Kong Univ Sci & Technol, Dept Chem Engn, Hong Kong, Hong Kong, Peoples R China
3.SINOPEC, Res Inst Petr Proc, Beijing 100083, Peoples R China
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Yao, N,Xiong, GX,Yeung, KL,et al. Ultrasonic synthesis of silica-alumina nanomaterials with controlled mesopore distribution without using surfactants[J]. LANGMUIR,2002,18(10):4111-4117.
APA Yao, N.,Xiong, GX.,Yeung, KL.,Sheng, SS.,He, MY.,...&Bao, XH.(2002).Ultrasonic synthesis of silica-alumina nanomaterials with controlled mesopore distribution without using surfactants.LANGMUIR,18(10),4111-4117.
MLA Yao, N,et al."Ultrasonic synthesis of silica-alumina nanomaterials with controlled mesopore distribution without using surfactants".LANGMUIR 18.10(2002):4111-4117.
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