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OALib Journal期刊
ISSN: 2333-9721
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na2co3调控醇热法制备规则形貌ag纳米晶
DOI: 10.3969/j.issn.1671-7627.2014.05.005, PP. 24-29
Keywords: ag纳米晶,醇热法,形貌控制,生长调控
Abstract:
以乙二醇为溶剂、na2s为成核剂、聚乙烯吡喏烷酮(pvp)和na2co3为修饰剂,采用醇热法制备不同形貌的ag纳米晶。通过调节反应时间、na2co3浓度、滴加速率以及起始滴加时间等来调控ag纳米晶的微结构。利用场发射扫描电子显微镜(fesem)和紫外-可见光(uv-vis)吸收光谱对ag纳米晶的形貌和尺寸以及局域表面等离子特性(lspr)进行表征。结果表明:浓度为50μmol/l的na2co3,在agno3滴加完毕后5.5min时以2ml/min的速率滴加到体系中反应3h,能够得到平均颗粒尺寸为60nm、尺寸分布均匀的截角立方ag纳米晶。
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