文献类型：期刊文献

中文题名：松香基季铵盐引导合成高分散纤维状介孔γ-Al_2O_3

英文题名：Synthesis of Highly Dispersed Fibrous Mesoporous γ-Al_2O_3 with Rosin-based Quaternary Ammonium Salt

作者：王鹏[1] 赵振东[2] 徐丽锋[1] 毕良武[2] 王宗德[1]

第一作者：王鹏

通信作者：Wang, P.

机构：[1]江西农业大学林学院;[2]中国林业科学研究院林产化学工业研究所

年份：2014

卷号：34

期号：2

起止页码：29-32

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;EI(收录号：20142117743647);Scopus(收录号：2-s2.0-84900487834);北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：江西省研究生创新专项资金项目(YC2013-S126);教育部博士学科点专项科研基金课题(20133603120002);江西农业大学博士科研启动项目(09004314)

语种：中文

中文关键词：松香基季铵盐;纤维状;碳酸铝铵;介孔氧化铝

外文关键词：rosin-based quaternary ammonium salt;fibrous;ammonium aluminium carbonate hydroxide;mesoporous alumina

分类号：TQ35

摘要：采用松香基季铵盐为结构导向剂,经尿素水热-均匀沉淀法成功合成出高分散纤维状介孔氧化铝。采用X射线衍射、N2-吸附脱附、场发射扫描电镜和透射电镜表征样品的结构性能。结果表明,经水热反应后,样品形成高分散的纤维状碳酸铝铵前驱体,经823 K煅烧4 h后,形成纤维状介孔γ-Al2O3。水热反应温度的高低,对样品的微观结构有着较大的影响,水热反应温度的升高有利于前驱体结晶度的提高,但经煅烧后,样品均转变为γ-Al2O3,且各样品晶相结构无显著差异。当水热温度为373 K时,样品比表面积相对较大(241.18 m2/g),但孔径相对较小(7.21 nm),提高或降低样品的水热反应温度会造成样品比表面积的下降,但样品的孔径会有所增大。在水热温度373 K下所得前驱体纤维长约为5μm,宽约为200 nm,经煅烧后样品形貌保存完整,且孔隙率有所增大。
Highly dispersed mesoporous alumina fibers were successfully synthesized through urea hydrothermal-uniform precipitation method using rosin-based quaternary ammonium salt as a structure directing agent. Their structures were characterized with X-ray diffraction, N2 adsorption and desorption, field-emission scanning electron microscope and transmission electron microscope. The results indicated that well dispersed fibrous ammonium aluminium carbonate hydroxide precursors were formed under the hydrothermal treatment. After the calcinations at 823 K for 4 h, fibrous mesoporous γ-Al2 O3 were obtained. The temperatures of the hydrothermal treatments had significant influence on the textural properties of the samples. The increase of the temperatures resulted in the increase of crystallinities. However, after the calcinations, all the samples transformed intoγ-Al2 O3 phase. No distinct difference of crystal structure could be observed among the samples. When the hydrothermal temperature was 373 K, the sample possessed a larger surface area （241. 18 m^2/g） with a smaller pore diameter（7. 21 nm）. The increase or decrease of the hydrothermal temperatures led to the decrease of surface areas, and the increase of pore diameters. The length of the precursor fibers was about 5 μm, and the width of which was about 200 nm. After the calcinations, the morphology of the sample kept intact with porocity increased.