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Facile synthesis of magnetic Fe3O4/CeCO3OH composites with excellent adsorption capability for small cationic dyes

机译：小阳离子染料具有优异吸附能力的磁Fe3O4 / Ceco3OH复合材料的构成

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摘要

Magnetic Fe3O4/CeCO3OH composites were prepared through a one-step hydrothermal route and their applications as adsorbents for removal of dyes were investigated. The as-prepared Fe3O4/CeCO3OH composites as well as single component Fe3O4 and CeCO3OH were characterized by XRD, TEM, FTIR, TG, XPS, EDX, Ar physisorption, and zeta potential analysis. Results showed that the composite of Fe3O4 with CeCO3OH significantly improved the adsorption ability compared to both Fe3O4 and CeCO3OH, and Fe/Ce dosage ratio was the key to control the adsorption properties of the adsorbents. The adsorption amount of the adsorbent was closely related to the amount of surface carboxylate groups, which exhibited surface negative charge and thus superior ability to adsorb cationic dyes. The weight percentages of surface carboxylate groups for the adsorbents with Fe/Ce dosage ratios of 5 : 0, 4 : 1, 1 : 1, 1 : 4 and 0 : 5 were 7.6%, 18.3%, 15.1%, 12.0% and 5.9%, respectively. The maximum adsorption capacity reached 666.2 mg g~(-1) for methylene blue (MB) at the Fe/Ce dosage ratio of 4 : 1, much higher than other magnetic adsorbents. The kinetic adsorption data fitted the pseudo-second-order model and the isotherm data followed the Langmuir model. Besides, the magnetic property of the Fe-Ce composite made solid-liquid separation easily achievable. These results demonstrated that this composite material could be used as a good adsorbent for selective removal of small cationic dyes from wastewater, and this facile synthesis method can be used to prepare other high performance adsorbents.
机译：通过一步水热途径制备磁Fe3O4 / ceco3OH复合材料，并研究其作为除去染料的吸附剂的应用。通过XRD，TEM，FTIR，TG，XPS，EDX，AR物理吸附和Zeta电位分析，表征用作制备的Fe3O4 / Ceco3OH复合材料以及单组分Fe 3 O 4和Ceco3OH。结果表明，与Fe3O4和Ceco3OH相比，用Ceco3OH的Fe3O4与Ceco3OH的复合能力显着改善了吸附能力，并且Fe / Ce剂量比是控制吸附剂吸附性能的关键。吸附剂的吸附量与表面羧酸盐基团的量密切相关，其表现出表面负电荷，从而优异地吸附阳离子染料的能力。具有5：0,4：1,1：1,1：4和0：5的Fe / Ce剂量比的吸附剂的表面羧酸盐基团的重量百分比为7.6％，18.3％，15.1％，12.0％和5.9 ％， 分别。在Fe / Ce剂量比为4：1的亚甲基蓝（MB），最大吸附容量达到666.2mg g〜（-1），比其他磁性吸附剂高得多。动力学吸附数据拟合了伪二阶模型和等温数据，然后是Langmuir模型。此外，Fe-Ce复合材料的磁性容易实现固体分离。这些结果表明，该复合材料可用作从废水中选择性除去小阳离子染料的良好吸附剂，并且该容易合成方法可用于制备其他高性能吸附剂。

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  • 来源
    《RSC Advances》 |2015年第114期|共8页
  • 作者

    Keyan Li; Fanfan Chai; Yongqin Zhao;

  • 作者单位

    State Key Laboratory of Fine Chemicals PSU-DUT Joint Center for Energy Research School of Chemical Engineering Dalian University of Technology Dalian 116024 PR China.;

    State Key Laboratory of Fine Chemicals PSU-DUT Joint Center for Energy Research School of Chemical Engineering Dalian University of Technology Dalian 116024 PR China.;

    State Key Laboratory of Fine Chemicals PSU-DUT Joint Center for Energy Research School of Chemical Engineering Dalian University of Technology Dalian 116024 PR China.;

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  • 正文语种 eng
  • 中图分类 化学;
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