Synthesis and characterization of nanosized zinc aluminate spinel from a novel Zn-Al layered double hydroxide precursor
Synthesis and characterization of nanosized zinc aluminate spinel from a novel Zn-Al layered double hydroxide precursor
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新型 Zn-Al 层状双氢氧化物前驱体纳米铝酸锌尖晶石的合成与表征
DOI：
10.1016/j.jallcom.2012.07.111
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发表时间：
2012-12-05
影响因子：
6.2
通讯作者：
Liu, Jianqiang
中科院分区：
文献类型：
--
作者：
Song, Jianye;Leng, Mingzhe;Liu, Jianqiang
本文采用尿素法制备了一种新型的[ZnAl2(OH)(6)]CO3中心点NH(2)O的锌铝层状双氢氧化物(LDH)。X-射线衍射仪和透射电子显微镜的结果证实了其层状晶体结构。通过在700℃以上焙烧[ZnAl2(OH)(6)]CO3中心点NH(2)O，成功地合成了纳米级铝酸锌尖晶石。用X射线衍射仪、傅里叶变换红外光谱、热重和差热分析等手段对其形成过程进行了表征。通过紫外-可见漫反射光谱和氮吸附分析研究了锌铝水滑石及其焙烧产物的光学和织构性质。900℃焙烧的样品禁带宽度在3.8-4.0 eV之间，比表面积随焙烧温度的升高而减小。(C)2012爱思唯尔B.V.保留所有权利。
In this paper, a novel Zn-Al layered double hydroxide (LDH) with composition [ZnAl2(OH)(6)]CO3 center dot nH(2)O was prepared using the urea method. The results of X-ray diffraction (XRD) and transmission electron microscopy (TEM) confirmed its layered crystalline structure. Nanosized zinc aluminate spinel was successfully synthesized by calcining [ZnAl2(OH)(6)]CO3 center dot nH(2)O at the temperatures 700 degrees C or above. The formation of ZnAl2O4 was monitored via XRD, Fourier transform infrared spectroscopy (FTIR), thermogravimetric and differential thermal analysis (TG-DTA). The optical and textural properties of the Zn-Al LDH and its calcined products were studied via UV-vis diffuse reflection spectroscopy and nitrogen sorption analysis. The band gap value of the sample calcined at 900 degrees C is in the range of 3.8-4.0 eV and the specific surface area decreases with increasing calcination temperatures. (C) 2012 Elsevier B.V. All rights reserved.