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Preparation of novel uniform mesoporous alumina catalysts by the sol-gel method
Yao, N; Xiong, GX; Zhang, YH; He, MY; Yang, WS
关键词Sol-gel Alumina Uniform Mesopore Catalysts
刊名CATALYSIS TODAY
2001-07-01
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
关键词[WOS]HYDROLYSIS ; ALKOXIDES
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.
语种英语
WOS记录号WOS:000170859100013
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/138855
专题中国科学院大连化学物理研究所
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
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GB/T 7714
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.
APA Yao, N,Xiong, GX,Zhang, YH,He, MY,&Yang, WS.(2001).Preparation of novel uniform mesoporous alumina catalysts by the sol-gel method.CATALYSIS TODAY,68(1-3),97-109.
MLA Yao, N,et al."Preparation of novel uniform mesoporous alumina catalysts by the sol-gel method".CATALYSIS TODAY 68.1-3(2001):97-109.
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