LI Shuangming， LIU Hui， YU Sansan， LI Wenxiu
（College of Chemical Engineering， Shenyang University of Chemical Technology， Shenyang 110142， China）
Abstract：Copper nano-particles were synthesized using sol-gel method with copper nitrate, citric acid and ammonia as starting materials. Experimental study of the effects of reaction temperatures, ratios of raw materials and pH values were carried out. TG-DTA was applied to analyze the minimum calcinations temperature of the dry gel. The structure and morphology of the nano-particles were characterized by XRD and SEM. The results show that the optimal conditions are as follows: molar ratio of citric acid and copper nitrate is 1∶2, pH value is 7, reaction temperature is 80 ℃, drying temperature is 100 ℃ and calcining temperature is 250 ℃ for 0.5 h. Ball-like copper nano-particles of 70 to 90 nm can be obtained under the above conditions. The structure of dried gel is deduced that citrate acid and copper ion exist mainly in two-tooth complex and partly in bridge complex.
Keywords：sol-gel process; copper nano-particles; citrate acid
文章编号：1008-5548（2013）06-0049-05
DOI：10.3969/j.issn.1008-5548.2013.06.012
收稿日期：2013-04-02，修回日期：2013-05-14，在线出版时间：2013-12-25。
基金项目：辽宁省博士科研启动基金项目，编号：20111047， 20121070；辽宁省高等学校优秀人才支持计划项目，编号：LR2012012，LJQ2012034。
第一作者简介：李双明（1982—），男，博士，讲师，研究方向为过渡金属纳米材料及林产资源加工利用。 E-mail：lishuangming1982@126.com。
通信作者简介：李文秀（1963—），男，博士，教授，研究方向为新型传质分离技术。 E-mail：wxli@syict.edu.cn。
