DICP OpenIR
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
Source PublicationLANGMUIR
2002-05-14
DOI10.1021/la0116084
Volume18Issue:10Pages:4111-4117
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Materials Science
WOS KeywordMOLECULAR-SIEVES ; CATALYSTS ; HYDROISOMERIZATION ; HYDROCRACKING ; OXIDATION ; MECHANISM
AbstractA 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.
Language英语
URL查看原文
WOS IDWOS:000175500300048
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/85719
Collection中国科学院大连化学物理研究所
Affiliation1.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
Recommended Citation
GB/T 7714
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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