Preparation of novel uniform mesoporous alumina catalysts by the sol-gel method | |
Yao, N; Xiong, GX; Zhang, YH; He, MY; Yang, WS | |
刊名 | catalysis today
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2001-07-01 | |
卷号 | 68期号:1-3页码:97-109 |
关键词 | sol-gel alumina uniform mesopore catalysts |
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. |
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 |
收录类别 | ISTP ; SCI |
语种 | 英语 |
WOS记录号 | WOS:000170859100013 |
公开日期 | 2015-11-10 |
内容类型 | 期刊论文 |
源URL | [http://159.226.238.44/handle/321008/138855] ![]() |
专题 | 大连化学物理研究所_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 |
推荐引用方式 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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