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Evolution of pore and surface characteristics of silica xerogels during calcining
Alternative TitleJ. Phys. Chem. Solids
Huang, WL; Cui, SH; Liang, KM; Yuan, ZF; Gu, SR
2002-04-01
Source PublicationJOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
ISSN0022-3697
Volume63Issue:4Pages:645-650
AbstractThis paper has investigated the effect of calcining temperature (600-1000degreesC) on the mesopore, structure and surface fractal dimension of silica xerogels derived from two-step acid-base-catalyzed TEOS (tetraethyl orthosilicate) systems. Two base contents were adopted in the base step. FE-SEM (field emission gun-scanning electron microscopy) observation and XRD (X-ray diffraction) analysis indicate that gel coarsening, agglomeration and sintering occurred successively with increasing temperature, and those prepared with higher base content exhibit easier agglomeration, lower sintering temperature and weaker crystallizability. Percent mesoporosity and surface fractal dimensions evaluation via image analysis methods shows that the mesoporosity of those prepared with lower base content increases below 700degreesC and decline at higher temperatures, while the surface fractal dimension appears to decrease above 800degreesC. (C) 2002 Elsevier Science Ltd. All rights reserved.; This paper has investigated the effect of calcining temperature (600-1000degreesC) on the mesopore, structure and surface fractal dimension of silica xerogels derived from two-step acid-base-catalyzed TEOS (tetraethyl orthosilicate) systems. Two base contents were adopted in the base step. FE-SEM (field emission gun-scanning electron microscopy) observation and XRD (X-ray diffraction) analysis indicate that gel coarsening, agglomeration and sintering occurred successively with increasing temperature, and those prepared with higher base content exhibit easier agglomeration, lower sintering temperature and weaker crystallizability. Percent mesoporosity and surface fractal dimensions evaluation via image analysis methods shows that the mesoporosity of those prepared with lower base content increases below 700degreesC and decline at higher temperatures, while the surface fractal dimension appears to decrease above 800degreesC. (C) 2002 Elsevier Science Ltd. All rights reserved.
KeywordOxides Microporous Materials Sol-gel Growth Electron Microscopy
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSOL-GEL PROCESS ; FRACTAL DIMENSIONS ; SELF-SIMILARITY ; AEROGELS ; HYDROLYSIS ; ADSORPTION
WOS Research AreaChemistry ; Physics
WOS SubjectChemistry, Multidisciplinary ; Physics, Condensed Matter
WOS IDWOS:000174453800016
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5604
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Multiphase React Lab, Beijing 100080, Peoples R China
2.Dist Dongchang, Tonghua 134000, Jilin Province, Peoples R China
3.Tsing Hua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China
Recommended Citation
GB/T 7714
Huang, WL,Cui, SH,Liang, KM,et al. Evolution of pore and surface characteristics of silica xerogels during calcining[J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS,2002,63(4):645-650.
APA Huang, WL,Cui, SH,Liang, KM,Yuan, ZF,&Gu, SR.(2002).Evolution of pore and surface characteristics of silica xerogels during calcining.JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS,63(4),645-650.
MLA Huang, WL,et al."Evolution of pore and surface characteristics of silica xerogels during calcining".JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS 63.4(2002):645-650.
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