罗望子多糖模板法制备纳米硒

Preparation of Nano-selenium Using Tamarind Polysaccharides as Template

以罗望子多糖为模板,通过亚硒酸和抗坏血酸反应制备纳米硒,探讨反应时间、反应物浓度、温度等条件对产物粒度的大小、形貌的影响,并采用光谱法、扫描电镜(SEM)和X射线衍射(XRD)等手段对产物进行表征。结果表明:当反应体系中亚硒酸和抗坏血酸的物质的量比为2∶1,罗望子多糖质量分数为0.02%,60℃下温浴4 h时得到红色的纳米硒,颗粒较小、均匀,平均粒径为39 nm左右。

Nano-selenium was prepared using tamarind seed polysaccharides（TSP） as template by reaction of selenious acid with ascorbic acid.The effects of reaction time,reactant concentration,temperature and other experimental conditions on particle size and morphology of product were studied.The products were characterized by UV-absorption,SEM and XRD.The results showed that when the reaction system is in the water bath at 60 ℃ for 4 h with TSP mass fraction 0.02 % and mass ratio of selenious acid to ascorbic acid 2∶1,the red and uniform selenium is obtained.Its average size is about 39nm.