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题名: Preparation of novel uniform mesoporous alumina catalysts by the sol-gel method
作者: Yao, N;  Xiong, GX;  Zhang, YH;  He, MY;  Yang, WS
关键词: sol-gel ;  alumina ;  uniform ;  mesopore ;  catalysts
刊名: CATALYSIS TODAY
发表日期: 2001-07-01
卷: 68, 期:1-3, 页:97-109
收录类别: ISTP ;  SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: A novel sol-gel process for preparing alumina sol is reported in this article. Ultrasound is used to prepare the alumina sol at room temperature. The study of the effect of ultrasound as a function of treatment time on the pH and the particle diameter distribution of the sol was also made. Al-27 NMR, TEM, XRD and DTA were used to detect the properties of the sol and the alumina materials. The result of Al-27 NMR shows that there existed Al-13(7+) species in the sol. The acid used not only acted as catalyst for peptizing, but also as reactant to react with aluminum hydroxide to produce the Al-13(7+) species. On the other hand, TEM results show that the morphology of the particles was spherical in the sol, but transformed to needle-like as well as spherical when calcined at 450 degreesC. At the end, the morphology of the particles changed to spherical again at 550 degreesC. By using this alumina sol as precursor, an alumina material with uniform mesoporous distribution was formed after calcination at 550 degreesC without adding any templates or other organic additives. The results of this work also show that the formation of alumina with uniform mesoporous distribution is related to its crystalline phase, the morphology of the particles and the particle diameter distribution of the precursor sol. (C) 2001 Elsevier Science B.V. All rights reserved.
关键词[WOS]: HYDROLYSIS ;  ALKOXIDES
语种: 英语
WOS记录号: WOS:000170859100013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138855
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.SINOPEC, Res Inst Petr Proc, Beijing 100083, Peoples R China

Recommended Citation:
Yao, N,Xiong, GX,Zhang, YH,et al. Preparation of novel uniform mesoporous alumina catalysts by the sol-gel method[J]. CATALYSIS TODAY,2001,68(1-3):97-109.
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