| 三维多枝雪花状银粉的制备及催化性能 |
| Preparation and Catalytic Activity of Three-Dimensional Highly Branched Snowflake-like Silver |
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| 摘要: 室温下,以聚乙烯醇为保护剂,采用抗坏血酸还原硝酸银,于水相中一步合成出三维多枝雪花状银粉。结合X射线粉末衍射(XRD)、扫描电子显微镜(SEM)等结构表征手段,对三维多枝雪花状银粉的微观结构进行详细分析,在此基础上提出其可能的形成机理。此外,三维多枝雪花状银粉在4-硝基苯酚催化加氢反应中还表现出优异的催化活性。 |
| 关键词: 银粉 聚乙烯醇 抗坏血酸 4-硝基苯酚 加氢还原 |
| 基金项目: 国家自然科学基金项目(21363011),云南省重点新产品开发项目(2016BA007)、云南省院所技术开发专项(2016DC033)资助 |
| Abstract: Three-dimensional highly branched snowflake-like silver powder (3DHBS) has been one-step synthesized by reducing silver nitrate with ascorbic acid under the protection of polyvinyl alcohol in aqueous solution at room temperature. The microstructure of 3DHBS was investigated in details through different characteristic methods including X-ray diffraction (XRD) and scanning electron microscopy (SEM) and the possible formation mechanism was proposed based upon it. Additionally, 3DHBS exhibited superior catalytic activity for the hydrogenation reduction of p-nitrophenol. |
| Keywords: silver powder polyvinyl alcohol ascorbic acid 4-nitrophenol hydrogenation reduction |
| 投稿时间：2017-08-16 修订日期：2017-10-25 |
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