NDLI: Thermal and morphological study of Al$_{2}$O$_{3}$ nanofibers derived from boehmite precursor

Content Provider	Springer Nature Link
Author	Peng, Lingli Xu, Xiangyu Lv, Zhi Song, Jiaqing He, Mingyuan Wang, Qian Yan, Lijun Li, Yang Li, Zhaofei
Copyright Year	2011
Abstract	The boehmite nanofibers were prepared by using NaAlO$_{2}$ and Al$_{2}$(SO$_{4}$)$_{3}$ as the starting materials without any surfactant. The phase transitions of the boehmite nanofibres against different temperature were studied and various phases were derived from well-crystallized boehmite nanofibers. All these phases had the same morphology even after high temperature calcination. In addition, the retention of specific surface area of the samples were very high because of the limited aggregation occurred in calcinations for each sample. For instance, the γ-Al$_{2}$O$_{3}$ obtained at 500 °C had the specific surface area (208.56 m$^{2}$/g) with an average pore diameter of 6.0 nm. With the further increase of the calcination temperature, the nanofibers became shorter and coarsening, which resulted in the decrease of the specific surface area. It is worthwhile to notice that the BET surface areas (40.97 m$^{2}$/g) and the pore volume (0.27 cm$^{3}$/g) of the fibrous structures obtained after 1200 °C calcination are substantially higher than that of the non-fibrous alumina because of the morphology maintenance.
Starting Page	749
Ending Page	754
Page Count	6
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	110
Issue Number	2
e-ISSN	15728943
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-10-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Boehmite Nanofiber Al$_{2}$O$_{3}$ Calcination Analytical Chemistry Inorganic Chemistry Polymer Sciences Physical Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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