水热法制备纳米银粉及其抗氧化性能研究
发布时间：2018-12-11 13:12
【摘要】：在不使用还原剂的前提下,采用水热法,以聚乙烯吡咯烷酮为保护剂,经高温热分解碳酸银制得银纳米颗粒,并通过单因素试验优选出水热反应时间为5 h、水热反应温度180℃、表面活性剂聚乙烯吡咯烷酮用量为1.74 g、硝酸银浓度为0.1 mol/L以及沉淀剂选用碳酸氢钠,用量为30 m L。用场发射扫描电子显微镜(SEM)、热失重分析仪(TG-DSC)、X射线衍射(XRD)和紫外可见分光光度仪对制备产物的表征结果表明,所得纳米银粉呈球形、三角和短棒状,具有面心立方结构,平均粒径在40~60 nm之间,在经过氧化氢处理后其紫外可见吸收光谱出现明显的钝化和蓝移。
[Abstract]:Without reducing agent, silver nanoparticles were prepared by hydrothermal method with polyvinylpyrrolidone as protective agent and silver carbonate was decomposed at high temperature. The thermal reaction time of the effluent was optimized for 5 h by single factor test. The hydrothermal reaction temperature is 180 鈩，
本文编号：2372611
[Abstract]:Without reducing agent, silver nanoparticles were prepared by hydrothermal method with polyvinylpyrrolidone as protective agent and silver carbonate was decomposed at high temperature. The thermal reaction time of the effluent was optimized for 5 h by single factor test. The hydrothermal reaction temperature is 180 鈩，
本文编号：2372611
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