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Synthesis of porous Al doped ZnO nanosheets with high adsorption and photodecolorizative activity and the key role of Al doping for methyl orange removal

机译:具有高吸附和光致抗溶解活性的多孔Al掺杂ZnO纳米片的合成及Al掺杂对甲基橙去除的关键作用

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摘要

Porous Al doped ZnO (AZO) nanosheets have been prepared as an efficient multifunctional water treatment material. Their fundamental properties were characterized by various spectroscopic testing methods. The AZO nanosheets displayed very rapid adsorption rate and high adsorption capacity for methyl orange (MO) dye. The kinetics and equilibrium of adsorption process were found to follow the pseudo-second-order kinetic and Langmuir isotherm models, respectively. Furthermore, the AZO nanosheets exhibited superior photodecolorizative activity compared with the commercial P25 TiO2 nanoparticles. It was found that Al doping increased the zeta potential of AZO nanosheets and then significantly enhanced the adsorption capacity for MO dye and, at the same time, retarded the recombination of photoexcited electron-hole pairs, and prolonged the lifetime of the photo-generated carriers, and then improved the semiconductor photocatalytic activity. In addition, the visible-light-driven dye photosensitized degradation was also an important reason for enhanced photodecolorizative activity. Therefore, AZO nanosheets are a potential multifunctional water treatment material combining highly efficient adsorption and photocatalytic degradation.
机译:多孔Al掺杂ZnO(AZO)纳米片已被制备为有效的多功能水处理材料。它们的基本特性是通过各种光谱检测方法的特征。 AZO纳米片显示出非常快速的吸附速率和甲基橙(Mo)染料的高吸附容量。发现吸附过程的动力学和平衡分别遵循伪二阶动力学和Langmuir等温模型。此外,与商业P25 TiO2纳米颗粒相比,Azo纳米蛋白酶表现出优异的光致沉淀活性。结果发现,掺杂氧化氮纳米片的Zeta电位,然后显着提高了Mo染料的吸附能力,同时延迟了光屏蔽电子 - 孔对的重组,并延长了光产生的载体的寿命然后改善了半导体光催化活性。此外,可见光驱动的染料光敏性降解也是增强光耐热活性的重要原因。因此,AZO纳米片是一种相结合高效吸附和光催化降解的潜在多功能水处理材料。

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  • 来源
    《RSC Advances》 |2016年第3期|共11页
  • 作者单位

    China Three Gorges Univ Coll Mech &

    Power Engn Coll Mat &

    Chem Engn Collaborat Innovat Ctr Energ Hubei Prov Collaborat Innovat Ctr New Energy Micr Yichang 443002 Peoples R China;

    China Three Gorges Univ Coll Mech &

    Power Engn Coll Mat &

    Chem Engn Collaborat Innovat Ctr Energ Hubei Prov Collaborat Innovat Ctr New Energy Micr Yichang 443002 Peoples R China;

    China Three Gorges Univ Coll Mech &

    Power Engn Coll Mat &

    Chem Engn Collaborat Innovat Ctr Energ Hubei Prov Collaborat Innovat Ctr New Energy Micr Yichang 443002 Peoples R China;

    China Three Gorges Univ Coll Mech &

    Power Engn Coll Mat &

    Chem Engn Collaborat Innovat Ctr Energ Hubei Prov Collaborat Innovat Ctr New Energy Micr Yichang 443002 Peoples R China;

    China Three Gorges Univ Coll Mech &

    Power Engn Coll Mat &

    Chem Engn Collaborat Innovat Ctr Energ Hubei Prov Collaborat Innovat Ctr New Energy Micr Yichang 443002 Peoples R China;

    China Three Gorges Univ Coll Mech &

    Power Engn Coll Mat &

    Chem Engn Collaborat Innovat Ctr Energ Hubei Prov Collaborat Innovat Ctr New Energy Micr Yichang 443002 Peoples R China;

    China Three Gorges Univ Coll Mech &

    Power Engn Coll Mat &

    Chem Engn Collaborat Innovat Ctr Energ Hubei Prov Collaborat Innovat Ctr New Energy Micr Yichang 443002 Peoples R China;

    China Three Gorges Univ Coll Mech &

    Power Engn Coll Mat &

    Chem Engn Collaborat Innovat Ctr Energ Hubei Prov Collaborat Innovat Ctr New Energy Micr Yichang 443002 Peoples R China;

    Guilin Univ Technol GuangXi Key Lab New Energy &

    Bldg Energy Saving Guilin 541004 Peoples R China;

    Guilin Univ Technol GuangXi Key Lab New Energy &

    Bldg Energy Saving Guilin 541004 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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