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首页> 外文期刊>RSC Advances >Functional manganese ferrite/graphene oxide nanocomposites: effects of graphene oxide on the adsorption mechanisms of organic MB dye and inorganic As(V) ions from aqueous solution
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Functional manganese ferrite/graphene oxide nanocomposites: effects of graphene oxide on the adsorption mechanisms of organic MB dye and inorganic As(V) ions from aqueous solution

机译：官能团锰铁氧体/石墨烯氧化物纳米复合材料：石墨烯氧化物对来自水溶液的有机MB染料和无机作为（v）离子的吸附机理的影响

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摘要

In this study, manganese ferrite-graphene oxide (MFO-GO) nanocomposites were prepared via a co-precipitation reaction of Fe3+ and Mn2+ ions in a GO suspension. The effects of graphene oxide on the physicochemical characteristics, magnetic properties and adsorption activities of the MFO-GO nanocomposites were studied. Methylene blue (MB) and arsenic(V) were used in this study as model water pollutants. With an increase in the GO content in the range of 10 wt% to 50 wt%, the removal efficiency for both MB dye and arsenic(V) ions was improved. Our adsorption data revealed that the adsorption behavior of MB dye showed good agreement with the Langmuir isotherm model and pseudo-second-order equation, whereas the Freundlich isotherm model was more suitable for simulating the adsorption process of arsenic(V) ions on the MFO-GO nanocomposites. In addition, an important role of the GO content in the adsorption mechanisms of both MB dye and arsenic(V) ions was found, in which GO nanosheets play a key role in the mechanisms of electrostatic/ionic interactions, oxygen-containing groups and p-p conjugation in the case of the adsorption of MB dye, whereas the role of the GO content is mainly related to the mechanism of electrostatic/ionic interactions in the case of the adsorption of arsenic(V). Graphene oxide has the functions of increasing the number of active binding sites comprising oxygen-containing functional groups, reducing the agglomeration of MFO nanoparticles, increasing the number of adsorption sites, and improving the electrostatic/ionic interactions between adsorbents and adsorbates in order to enhance the adsorption performance of cationic organic dyes and/or heavy metal anions from aqueous solutions.
机译：在该研究中，通过在悬浮液中的Fe3 +和Mn 2 +离子的共沉淀反应制备锰铁氧体 - 石墨烯氧化物（MFO-GO）纳米复合材料。研究了石墨烯氧化物对MFO-GO纳米复合材料的物理化学特性，磁性和吸附活性的影响。在本研究中使用亚甲基蓝（MB）和砷（V）作为模型水污染物。随着10wt％至50wt％范围内的GO含量的增加，改善了MB染料和砷（V）离子的去除效率。我们的吸附数据显示，MB染料的吸附行为与Langmuir等温模型和伪二阶方程吻合良好，而Freundlich等温模型更适合模拟砷（V）离子对MFO的吸附过程去纳米复合材料。此外，发现了GO含量在MB染料和砷（V）离子的吸附机制中的重要作用，其中GO纳米片在静电/离子相互作用，含氧基团和PP的机制中起关键作用在吸附MB染料的情况下缀合，而GO含量的作用主要与砷（V）吸附的静电/离子相互作用的机制有关。石墨烯氧化物具有增加包含含氧官能团的活性结合位点的函数，降低MFO纳米颗粒的附聚，增加吸附位点的数量，并改善吸附剂和吸附剂之间的静电/离子相互作用以增强水溶液中阳离子有机染料和/或重金属阴离子的吸附性能。

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  • 来源
    《RSC Advances》 |2018年第22期|共14页
  • 作者

    Pham Thi Lan Huong; Nguyen Tu; Lan Hoang; Le Hong Thang; Nguyen Van Quy; Pham Anh Tuan; Ngo Xuan Dinh; Vu Ngoc Phan; Anh-Tuan Le;

  • 作者单位

    Hanoi Univ Sci &

    Technol Adv Inst Sci &

    Technol Dept Nanosci &

    Nanotechnol 1 Dai Co Viet St Hanoi Vietnam;

    Hanoi Univ Sci &

    Technol Adv Inst Sci &

    Technol Dept Nanosci &

    Nanotechnol 1 Dai Co Viet St Hanoi Vietnam;

    Hanoi Univ Sci &

    Technol Adv Inst Sci &

    Technol Dept Nanosci &

    Nanotechnol 1 Dai Co Viet St Hanoi Vietnam;

    Hanoi Univ Sci &

    Technol School Mat Sci &

    Engn Hanoi 10000 Vietnam;

    Hanoi Univ Sci &

    Technol Int Training Inst Mat Sci Hanoi 10000 Vietnam;

    Vietnam Metrol Inst 08 Hoang Quoc Viet Rd Hanoi Vietnam;

    Univ Transport Technol Hanoi 10000 Vietnam;

    Hanoi Univ Sci &

    Technol Adv Inst Sci &

    Technol Dept Nanosci &

    Nanotechnol 1 Dai Co Viet St Hanoi Vietnam;

    Hanoi Univ Sci &

    Technol Adv Inst Sci &

    Technol Dept Nanosci &

    Nanotechnol 1 Dai Co Viet St Hanoi Vietnam;

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  • 正文语种 eng
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