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题名: The search of promoters for silica condensation and rational synthesis of hydrothermally stable and well ordered mesoporous silica materials with high degree of silica condensation at conventional temperature
作者: Du, Yunchen1, 2;  Lan, Xijie3;  Liu, Sen1, 2;  Ji, Yanyan1, 2;  Zhang, Yonglai1, 2;  Zhang, Weiping3;  Xiao, Feng-Shou1, 2
通讯作者: Feng-Shou Xiao
关键词: silica condensation ;  ordered mesoporous materials ;  anionic effect ;  hydrothermal stability ;  Si-29 MAS NMR spectroscopy
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2008-07-01
DOI: 10.1016/j.micromeso.2007.09.033
卷: 112, 期:1-3, 页:225-234
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 502
产权排名: 2;2
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: Silica samples condensed at acidic, neutral and alkaline media in the presence of various inorganic anions have been carefully investigated by Si-29 MAS NMR spectroscopy. The results show that SO42- and CO32- could effectively improve the degree of silica condensation under neutral and alkaline media. Accordingly, for example, it is designable to synthesize hydrothermally stable and well ordered hexagonal mesoporous SBA-15 with very high degree of silica condensation in the presence of sulfate and carbonate species under neutral condition. As we expected, hexagonal mesoporous silica materials in the presence of sulfate (SBA-15-S) and carbonate species (SBA-15-U) show high degree of silica condensation, giving Q(4)/Q(3) ratios at 6.3 and 4.3, which are much higher than that of conventional SBA-15 (Q(4)/(Q(3) + Q(2)) ratio at 1.8) synthesized in the absence of sulfate and carbonate species. Very interestingly, hexagonal mesoporous SBA-15-S and SBA-15-U shows very high hydrothermal stability, compared with SBA-15. For example, after being treated in 100% steaming at 780 degrees C for 3 h, SBA-15-S still remains its mesostructure. In constrast, SBA-15 loses most of the mesostructure. Furthermore, heteroatoms-substituted mesoporous materials such as aluminosilicate (Al-SBA-15-U) could also be synthesized in the presence of urea under neutral condition, and Al-SBA-15-U exhibits extraordinary hydrothermal stability. The unique and novel route for syntheses of hydrothermally stable and well ordered mesoporous silica and aluminosilicate materials in the presence of sulfate and carbonate species would be very important for potential application of mesoporous silica (SBA-15) and aluminosilicate materials (Al-SBA-15) as industrially supports and acidic catalysts. (C) 2007 Published by Elsevier Inc.
关键词[WOS]: HYDROCARBON SURFACTANT MIXTURES ;  MOLECULAR-SIEVES ;  PORE-SIZE ;  STABILITY ;  MCM-41 ;  NMR ;  ALUMINOSILICATE ;  IMPROVEMENT ;  TITANOSILICATES ;  ENHANCEMENT
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000256713300026
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/100587
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.Jilin Univ, Coll Chem, Changchun 130023, Peoples R China
2.Jilin Univ, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130023, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Du, Yunchen,Lan, Xijie,Liu, Sen,et al. The search of promoters for silica condensation and rational synthesis of hydrothermally stable and well ordered mesoporous silica materials with high degree of silica condensation at conventional temperature[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2008,112(1-3):225-234.
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