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纳米铁颗粒物表征及其对2,4-二氯苯酚的脱氯降解性能 被引量:5

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摘要 对纳米铁超细粉进行了透射电子显微镜(TEM)、X射线衍射(XRD)、X光电子能谱(XPS)等结构表征,并研究了其对2,4-二氯苯酚的吸附降解性能.结果表明,实验所用纳米铁超细粉呈核-壳型结构,颗粒粒径为30~40nm,其表面含有大量的Fe3O4钝化氧化层;为去除纳米铁表面的钝化层,提高其活性,对其进行盐酸酸化,探讨了酸化前后纳米铁在不同投加量下对2,4-二氯苯酚的降解去除情况.实验发现,活化前的纳米铁对2,4-二氯苯酚的去除主要为吸附过程,活化后的纳米铁则能够迅速与2,4-二氯苯酚发生降解反应.当铁的投加量为150mg时,反应溶液中可检测到苯酚、2-氯酚、4-氯酚等降解产物的出现,说明纳米铁对2,4-二氯苯酚的降解主要为脱氯反应.
出处 《科学通报》 EI CAS CSCD 北大核心 2009年第23期3623-3629,共7页 Chinese Science Bulletin
基金 国家自然科学基金(批准号:20677073,20537020) 国家重点基础研究发展计划(编号:2007CB407304)资助项目
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