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OALib Journal期刊
ISSN: 2333-9721
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聚吡咯/纳米SiO2复合材料的制备及氧化性能
DOI: 10.11777/j.issn1000-3304.2015.14401, PP. 596-601
Keywords: 聚吡咯,二氧化硅,对苯二酚,氧化,紫外-可见光谱法
Abstract:
采用化学氧化法制备聚吡咯/纳米SiO2(PPy/nSiO2)复合材料,通过扫描电子显微镜和红外光谱对其进行表征,并将其应用到对苯二酚的氧化反应中.结果表明,PPy/nSiO2复合材料中,PPy较均匀地负载在纳米SiO2表面.在弱酸性介质中,PPy/nSiO2对对苯二酚具有很好的氧化性能.反应2h内,对苯二酚的氧化过程符合表观一级反应动力学.结合紫外-可见光谱法分析表明,聚吡咯通过与对苯二酚之间的氢键相互作用形成聚吡咯活性中间体,将对苯二酚氧化为对苯醌,聚吡咯具有氧化剂和催化剂的双重功能.
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