摘要
采用水热法合成了一维纳米氧化铝,并用XRD、N2吸附-脱附、FT-IR、SEM、TEM以及HRTEM等手段对样品进行了表征,结合高分辨图像和FT-IR表征结果对其暴露晶面进行研究,探讨暴露晶面与表面羟基的关联,探索氧化铝一维结构形成机制。结果表明,合成的样品为单晶纳米棒,长度主要集中在(100～150)nm,宽(10～15)nm,结晶度高,孔径最可几分布为25 nm,孔径较大,表面存在四面体-八面体桥连羟基(Ⅱa型)和八面体三键桥羟基(Ⅲ型),暴露晶面主要是(100)晶面和(111)晶面。n(OH-)∶n(Al3+)决定一维结构的形成。
One-dimensional nanostructure A1203 was prepared by hydrothermal synthesis method, and characterized by X-ray diffraction, N2 adsorption-desorption, FT-IR spectroscopy, scanning electron microscopy, transmission electron microscopy and high-resolution TEM measurements techniques. The exposed crystal planes were studied by combining HRTEM pictures and FT-IR data. The connection between exposed crystal planes and surface hydroxy groups was discussed, and one possible mechanism for the formation of one-dimensional nanostrueture alumina was proposed. The results showed that an individual nano-rod with the diameter （10 - 15 ） nm and the length （100 - 150） nm had single-crystalline structure with high erystallinity. The most probable value of pore size was 25 nm. The surface of the products pres- ented I] a hydroxy group and m hydroxy group, and the main exposed crystal planes were （ 100 ） and （111 ）. The formation of one-dimensional nanostructure was determined by n（ OH-）：n（ Al3＋ ）.
出处
《工业催化》
CAS
2012年第7期38-42,共5页
Industrial Catalysis
关键词
催化化学
一维纳米
暴露晶面
高分辨
单晶
表面羟基
catalytic chemistry
one-dimensional alumina nano-rods
exposed crystal planes
single crystal
surface hydroxy groups
作者简介
作者简介：苗升，1985年生，男，山东省淄博市人，在读硕士研究生，研究方向为清洁燃料生产。E—mail：miaosheng88@126．com
通讯联系人：沈智奇，教授级高级工程师。E-mail：zhiqishen．fripp@gmail．com
