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题名: Mesoporous gamma-alumina synthesized by hydro-carboxylic acid as structure-directing agent
作者: Liu, Q;  Wang, AQ;  Wang, XD;  Zhang, T
关键词: mesoporous alumina ;  gamma-alumina ;  mesoporous material ;  non-surfactant template ;  hydro-carboxylic acid
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2006-06-20
DOI: 10.1016/j.micromeso.2005.12.012
卷: 92, 期:1-3, 页:10-21
收录类别: SCI
文章类型: Article
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: A facile and non-surfactant-templating route is described for preparing mesoporous gamma-aluminas with improved textural properties. In this synthesis, hydro-carboxylic acid (HCA) was used as the structure-directing agent and boehmite sol as the precursor. By drying the mixture of HCA and boehmite sol at a suitable temperature and then calcining at 773 K, the mesoporous gamma-alumina with controllable pore structures could be obtained. The drying temperature of the initial boehmite-HCA mixture had an important effect on the pore structure of the final product. As the drying temperature increased successively from 303 K to 373 K and 423 K, the products changed correspondingly from a bimodal mesoporous structure to a uniform mesostructure and a micro-mesoporous structure. By means of various characterization techniques, including N-2 physical adsorption, TEM, SEM, XRD Al-27 NMR, FTIR and TG-DTA, it was demonstrated that the coordination between HCA and aluminum became stronger with the increase of the drying temperature, so that the strong coordination interaction between the HCA and the boehmite colloid particulates could induce a kind of arrangement of rigid boehmite "building blocks", thus giving rise to different pore structures. (c) 2006 Elsevier Inc. All rights reserved.
关键词[WOS]: MOLECULAR-SIEVES ;  SURFACE-AREA ;  CITRIC-ACID ;  SILICA MATERIALS ;  NONIONIC SURFACTANTS ;  METAL-OXIDES ;  SIZE ;  ALUMINUM(III) ;  GAMMA-AL2O3 ;  TEMPLATES
语种: 英语
WOS记录号: WOS:000238473200002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140193
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.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Grad Univ, Chinese Acad Sci, Beijing, Peoples R China

Recommended Citation:
Liu, Q,Wang, AQ,Wang, XD,et al. Mesoporous gamma-alumina synthesized by hydro-carboxylic acid as structure-directing agent[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2006,92(1-3):10-21.
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