Preparation of novel uniform mesoporous alumina catalysts by the sol-gel method

	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
	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.