绿色合成纳米铁及其用于降解甲基橙

来源 :第十一届全国博士生学术年会专题——节能环保与污染防治技术分会场论坛 | 被引量 : 0次 | 上传用户:luoqh163
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利用桑树叶提取液中的有机物质,主要是多糖类,作为还原剂和稳定剂,把亚铁离子绿色还原成纳米铁颗粒(MLE-Fe NPs),并通过UV-Vis、SEM、EDS、XRD和TG等表征手段,对所合成的纳米铁颗粒进行表征和分析,结果表明所合成的纳米铁是无定形态的,球状的颗粒,粒径大约在30-50 nm。以甲基橙(MO)为目标降解物,探讨MLE-FeNPs对甲基橙降解的可能性,其降解过程符合表观一级反应动力学。基于表征和降解动力学的依据,MLE-Fe NPs对甲基橙的可能去除机理是甲基橙先吸附在MLE-Fe NPs表面上,纳米铁在水的侵蚀作用下产生自由电子,与甲基橙中的发色基团发生还原作用,达到脱色效果。
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