Effect of thermal treatment on the aluminum hydroxide nanofibers synthesized by electrolysis of Al plates
Effect of thermal treatment on the aluminum hydroxide nanofibers synthesized by electrolysis of Al plates
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DOI：
10.1016/j.mee.2011.03.146
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发表时间：
2012-01-01
影响因子：
2.3
通讯作者：
Kim, Hasuck
中科院分区：
文献类型：
--
作者：
Woo, Seunghee;Park, Joong-Hark;Kim, Hasuck
采用电解铝板的新工艺合成了高比表面积的纳米纤维状氢氧化铝，该工艺具有简单、快速的优点。系统地研究了热处理对结构相变的影响。煅烧所制备的勃姆石（AlO（OH））粉末产生一系列相转变，最终在1200 ℃转变为结晶稳定相（α-Al（2）O（3））。在经过约350 ℃的过渡区后，结晶γ-Al（2）O（3）相逐渐形成，并且在400 ℃以上，勃姆石完全转变为γ-Al（2）O（3）相。生成的γ-Al（2）O（3）明显是直径为2-5 nm、长度为20-50 nm的颗粒。(C)2011 Elsevier B. V.保留所有权利。\
Nanofibrous aluminum hydroxides with high specific surface area have been synthesized by a novel process employing electrolysis of aluminum plates, which has the advantages of being very simple and fast. The structural phase transformation has been systemically investigated as a function of thermal treatment. Calcination of the as-prepared boehmite (AlO(OH)) powders produced a series of phase transition that finally transformed into the thermodynamically stable phase (alpha-Al(2)O(3)) at 1200 degrees C. After passing the transition region of about 350 degrees C, crystalline gamma-Al(2)O(3) phase gradually developed and above 400 degrees C, the boehmite was completely transformed into gamma-Al(2)O(3) phase. The produced gamma-Al(2)O(3) was clearly a nanofiber with a typical diameter of 2-5 nm and length of 20-50 nm. (C) 2011 Elsevier B.V. All rights reserved.\