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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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不同有机分子改性羟基磷灰石用于甲醛催化氧化
DOI: 10.1016/S1872-2067(14)60129-7, PP. 1927-1936
Keywords: 羟基磷灰石改性,柠檬酸钠,比表面积,羟基,甲醛催化氧化
Abstract:
？分别采用十六烷基三甲基溴化铵(CTAB)、十二烷基硫酸钠(SDS)及柠檬酸钠(SC)对羟基磷灰石(HAP)进行了有机改性.柠檬酸钠改性的羟基磷灰石对甲醛催化氧化表现出最好的催化活性,在240℃实现了甲醛完全转化.通过X射线衍射、红外光谱、N2吸附-脱附、扫描电镜和热重/差重等手段对HAP结构进行了表征.结果表明,SC改性使得HAP比表面积和孔体积增加,孔径减小,更有利于吸附及传质,从而提高了其活性.此外,SC改性的HAP中羟基含量更多,更有利于甲醛与羟基之间发生相互作用,这是该样品活性提高的另一个原因.
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