摘要
报道了一种利用天然高分子壳聚糖为软模板水相制备纳米硒的方法。研究了反应时间、反应物浓度、温度、超声等实验条件对产物粒度大小、形貌的影响。结果表明 ,当n(Vc)∶n(H2 SeO3 ) =4∶1、壳聚糖质量分数为 1 2 0× 10 -4、常温下反应 2h时 ,可得到均匀稳定的球形纳米硒颗粒 ,平均粒径约 5 0nm ,并随反应体系的总浓度增加而减小。在 80℃反应时 ,得到了棒状纳米硒。采用紫外光谱、红外光谱、X射线衍射和透射电镜等对产物进行了结构分析和形貌观察。
Selenium nanoparticles have been synthesized in an aqueous solution by using chitosan(CTS) as a soft template. The factors on synthesis, such as reaction time, concentration of reactants, temperature, and ultrasonic irradiation were studied. The uniform stable selenium nanospheres were obtained in conditions of 1.20×10 -4(mass fraction) CTS, n(Vc)∶n(H 2SeO 3)=4∶1 and 2 h after the initiation of the reaction at room temperature. The average particle size of selenium is about 50 nm and decreases with increase of the total concentration of the reactants. Selenium nanorods were obtained at 80 ℃. The products were characterized by UV, IR, XRD and TEM.
出处
《应用化学》
CAS
CSCD
北大核心
2004年第8期788-792,共5页
Chinese Journal of Applied Chemistry
基金
安徽省自然科学基金 ( 0 0 0 2 2 0 0 2 )资助课题
关键词
纳米硒
制备
壳聚糖
模板
selenium nanoparticle,preparation,chitosan,soft template
