纳米AlOOH（Al2O3）的合成及表面性质研究

石油炼制与化工 ›› 2014, Vol. 45 ›› Issue (1): 42-46.

纳米AlOOH（Al2O3）的合成及表面性质研究

季洪海¹,苗升²,沈智奇¹,凌凤香¹

1. 中国石化抚顺石油化工研究院
2. 中国石化胜利油建工程有限公司

收稿日期:2013-05-24 修回日期:2013-08-21 出版日期:2014-01-12 发布日期:2013-12-23
通讯作者: 季洪海 E-mail:jhhyd@126.com
基金资助:
中国石油化工股份有限公司合同项目

SYNTHESIS AND SURFACE PROPERTIES OF NANOSTRUCTURE AlOOH(Al2O3)

Received:2013-05-24 Revised:2013-08-21 Online:2014-01-12 Published:2013-12-23

摘要/Abstract

摘要： 以AlCl3?6H2O为铝源、NaOH为沉淀剂，采用水热合成法制得AlOOH和AlOOH纳米片，焙烧后得到相同形貌的Al2O3。通过X射线衍射、透射电子显微镜、傅里叶变换红外光谱对样品进行表征。结果表明：所制样品为γ-AlOOH，焙烧后转变为γ-Al2O3，结晶度高，每个纳米棒及纳米片均为单晶；n（OH－）/n（Al3+）对AlOOH和Al2O3的形貌有较大影响，随着n（OH-）/n（Al3+）的增大，AlOOH的长径比逐渐减小，最终成为纳米片；Al2O3纳米棒表面有2种类型的羟基，分别归属于（110）晶面HO-μ2-AlⅥ和（100）晶面HO-μ3-AlⅥ，Al2O3纳米片表面有4种类型的羟基，分别归属于（111）晶面HO-μ3-AlⅥ、HO-μ2-AlⅥ和（110）晶面HO-μ2-AlⅥ和HO-μ3-AlⅥ。

Abstract: The AlOOH nanorods and nanoflakes were prepared via hydrothermal synthesis using AlCl3?6H2O and NaOH. They were further converted into Al2O3 with same shape after calcination. Several techniques such as X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Fourier-transform infrared (FTIR) measurements were used to characterize the products. The results show that the products are γ-AlOOH. They were converted into γ-Al2O3 after calcinations. All the nanocrystals are single crystal with high crystallinity. The ratio of n（OH-）/n（Al3+） has a great influence on the shape of AlOOH and Al2O3. With the n（OH-）/n（Al3+）increasing, the ratio of length to diameter decreases for AlOOH which finally become nanoflakes. There are two types of OH groups on γ-Al2O3 nanorod, i.e HO-μ2-AlⅥ of Al2O3 (110) crystal plane and HO-μ2-AlⅥ of Al2O3 (100) crystal plane, respectively; There are four types of OH groups on γ-Al2O3 nanoflake. They are HO-μ3-AlⅥ and HO-μ2-AlⅥ of Al2O3 (111) crystal plane and HO-μ2-AlⅥ and HO-μ3-AlⅥ of Al2O3 (110) crystal plane.

季洪海苗升沈智奇凌凤香. 纳米AlOOH（Al2O3）的合成及表面性质研究[J]. 石油炼制与化工, 2014, 45(1): 42-46.