溶胶-凝胶法制备纳米TiO，及粒径控制工艺
付贵欣王超宇庄志萍（牡丹江师范学院化学化工学院，牡丹江157011）
文摘采用溶胶-凝胶法，以钛酸丁酯为前驱体，乙二醇作为整合剂制备纳米TiO，粒子。考察钛的乙二醇盐的浓度、pH值、温度等因素对TiO，粒径的影响，并用红外光谱和SEM对纳米TiO，粒子进行结构和形貌表征。结果表明，采用溶胶凝胶法可以制备出呈椭圆形且粒径分布均匀的TiO，纳米粒子。使用硝酸铵可以有效阻止Ti0，纳米粒子团聚。当pH值为2~3、温度为20~40℃，钛的乙二醇盐在丙酮中的浓度为0.03、0.05及 0.07M时，粒径分别为150、240及600nm。
关键词溶胶-凝胶法，纳米TiOz，团聚，粒径可控
中图分类号：TG4
D0I:10.3969/j. issn.10072330.2014.06.008
NanometerTitaniumDioxideParticleandSizeControl
Technology by Sol-Gel Mothod
FUGuixin
WANG Chaoyu
ZHUANGZhiping
(College of Chemistry and Chemical Engineering,Mudanjiang Normal University,Mudanjiang157011)
AbstractNanometer titanium dioxide particles have been prepared by the sol-gel method,in which butyl titan-ate as precursor,ethylene glycol as a chelating agent. And the glycol of titanium salt concentration,pH value,tempera ture on the influence of the particle size titanium dioxide were studied. Moreover,the structure and morphology of nan ometer titanium dioxide particles were characterized by infrared spectroscopy and SEM. The experimental results show that uniform size distribution of nanoparticles titanium dioxide can be prepared by sol-gel method. Using ammonium ni-trate could effectively prevent the titanium dioxide nanoparticles reunion. When pH value is 2 to 3, the temperature is 20°C to 40°C ,the concentration of titanium salt of ethylene glycol in the acetone is 0. 03 M,the diameter of titanium dioxide nanoparticle is 150 nm ; the concentration of titanium salt of ethylene glycol in the acetone is 0. 05 M,the parti-cle size is 240 nm; and when the concentration of titanium salt of ethylene glycol in the acetone is 0. 07 M,the diame-ter of titanium dioxide nanoparticles can reach to 600 nm.
Key wordsSol-Gel method,Nanometer TiO,,Reunion,Particle size controllable
0引言
TiO，是一种新型的多功能材料，化学性质稳定、具有优良的光电催化性能等优点。在环境、信息、材料、医药和卫生等方面有着广泛的应用。目前，国内外制备纳米TiO,的方法较多]，包括溶胶-凝胶法[2-3]、水热法[4-5]、微乳法[6]、溶剂热法等等["]。其中溶胶-凝胶法具有操作简单、反应条件温和、合成产物分散性好、表面积大、品质高等优点*)。但工艺
收稿日期；20140620
基金项目：黑龙江省教育厅科技项目（12511579）
条件对TiO，粒径影响较大，在焙烧时凝胶颗粒之间易于团聚[9-10]。本文采用溶胶-凝胶法制备TiO，纳米粒子，考察钛的乙二醇盐的浓度、PH值、温度等因素对TiO，粒径大小的影响。使用硝酸铵阻止TiO, 纳米粒子团聚，并用红外光谱、SEM对TiO，粒子进行
表征。 1实验
1.1试剂和仪器
作者简介：付费欣，1985年出生，硕士，研究方向；编米材料。E=mail：fgx6511765@163.com 通讯作者：庄志荐，1963年出生，教投。Email；zhuangchiping63@163.com
34-万方数据
宇航材料工艺
http://www.yhelgy.com
2014年第6期