Synthesis of hierarchical Mg-doped Fe₃O₄ micro/nano materials for the decomposition of hexachlorobenzene

详细信息    查看全文

• 作者：Guijin Su ; Yexuan Liu ; Linyan Huang ; Huijie Lu ; Sha Liu ; Liewu Li ; Minghui Zheng
• 关键词：Micro/nano material ; Mg-doped Fe3O4 ; Hexachlorobenzene decomposition ; Dechlorination efficiency
• 刊名：Chemosphere
• 出版年：March, 2014
• 年：2014
• 卷：99
• 期：Complete
• 页码：216-223
• 全文大小：1933 K

文摘

An ethylene-glycol (EG) mediated self-assembly process was firstly developed to synthesize micrometer-sized nanostructured Mg-doped Fe₃O₄ composite oxides to decompose hexachlorobenzene (HCB) at 300 掳C. The synthesized samples were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy dispersive X-ray spectroscopy and inductively coupled plasma optical emission spectrometer. The morphology and composition of the composite oxide precursor were regulated by the molar ratio of the magnesium acetate and ferric nitrate as the reactants. Calcination of the precursor particles, prepared with different molar ratio of the metal salts, under a reducing nitrogen atmosphere, generated three kinds of Mg doped Fe₃O₄ composite oxide micro/nano materials. Their reactivity toward HCB decomposition was likely influenced by the material morphology and content of Mg dopants. Ball-like MgFe₂O₄-Fe₃O₄ composite oxide micro/nano material showed superior HCB dechlorination efficiencies when compared with pure Fe₃O₄ micro/nano material, prepared under similar experimental conditions, thus highlighting the benefits of doping Mg into Fe₃O₄ matrices.