(羟基)氧化铁/硅酸铜复合结构的制备及Cr(VI)吸附性能研究

Synthesis and Cr(VI) Adsorption Property of Iron Oxide(or Hydroxide)/CuSiO_3 Composites

构建由不同结构基元组成的多级复合结构是提高材料对重金属离子吸附能力的一种有效方法。利用stober法制备了Fe3O4(α-Fe2O3或β-FeOOH)/SiO2核壳结构。通过引入Cu2+,与表面包覆的SiO2发生原位反应,在样品表面生长了CuSiO3纳米棒,得到了具有优异吸附能力的Fe3O4(α-Fe2O3或β-FeOOH)/CuSiO3核壳结构。最后对比分析了Fe3O4(α-Fe2O3或β-FeOOH)/SiO2核壳结构和Fe3O4(α-Fe2O3或β-FeOOH)/CuSiO3核壳结构对Cr(VI)离子的平衡吸附规律。

Fabricating hierarchical structures is an effect method to improve its performance in heavy metal adsorption.In this study,Fe3O4（ α-Fe2O3 or β-FeOOH） /SiO2 core shell structures were prepared by stober method.CuSiO3 nanorods grew on the surface of Fe3O4（ α-Fe2O3 or β-FeOOH） by the reaction between Cu^2＋ and silica layer.Fe3O4（ α-Fe2O3 or β-FeOOH） /CuSiO3 core shell structures were obtained and showed great adsorption property.Their adsorption activities were determined using Cr（ Ⅵ） aqueous solution.The equilibrium adsorption isotherm of Cr（ Ⅵ） of Fe3O4（ α-Fe2O3 or β-FeOOH） / SiO2 and Fe3O4（ α-Fe2O3 or β-FeOOH） /CuSiO3 core shell structures were studied.