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首页> 外文期刊>RSC Advances >Synthesis of flower-shaped ZrO2-C composites for adsorptive removal of trichlorophenol from aqueous solution
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Synthesis of flower-shaped ZrO2-C composites for adsorptive removal of trichlorophenol from aqueous solution

机译：从水溶液中吸附三氯苯酚的花形ZrO2-C复合材料的合成

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摘要

In the current study, examples of a novel kind of nanoflake zirconia-carbon (ZrO2-C) composite were synthesized through a simple method by using gallic acid and ZrCl4 as precursors. The as-synthesized ZrO2-C composites were observed to have high specific surface areas and a chrysanthemum-like structure. High-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, infrared spectroscopy, X-ray diffraction, and Raman analyses revealed that the ZrO2-C composites were composed of graphitized carbon and numerous ZrO2 nanoparticles (3-4 nm in diameter). The ZrO2-C composites were successfully used as adsorption materials to remove 2,4,6-trichlorophenol (TCP) from simulated water samples. The results showed that ZrO2-C exhibited a much higher adsorption capacity for TCP than did some reported carbon materials. The hydrophobic interaction and/or pi-pi stacking interaction between TCP and the carbon phase, hydrogen bonding with functional groups of ZrO2-C, and metal-anion binding with ZrO2 nanoparticles contributed to the high adsorption ability. Generally, TCP uptake was favorable in an acidic environment and increased as the initial TCP concentration and temperature were increased. The adsorption process obeyed pseudo-second-order kinetics, and the adsorption isotherms could be well described by the Freundlich equation.
机译：在目前的研究中，通过使用本发明的无碱酸和ZrCl4作为前体，通过简单方法合成一种新颖的纳米淀粉氧化锆 - 碳（ZrO2-C）复合材料的实例。观察到和合成的ZrO2-C复合材料具有高比表面积和菊花状结构。高分辨率透射电子显微镜，X射线光电子体光谱，红外光谱，X射线衍射和拉曼分析显示，ZrO2-C复合材料由石墨化碳和无数ZrO2纳米颗粒（直径为3-4nm）组成。 ZrO2-C复合材料成功用作吸附材料，以从模拟水样中除去2,4,6-三氯苯酚（TCP）。结果表明，ZrO2-C对TCP的吸附能力较高，而不是一些报告的碳材料。 TCP和碳相之间的疏水相互作用和/或PI-PI堆叠相互作用，氢键与ZrO2-C的官能团的氢键，以及与ZrO2纳米颗粒的金属阴离子结合有助于高吸附能力。通常，TCP吸收在酸性环境中有利，随着初始TCP浓度和温度增加而增加。吸附过程遵循伪二阶动力学，并且通过Freundlich方程可以很好地描述吸附等温。

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  • 来源
    《RSC Advances》 |2015年第94期|共9页
  • 作者

    Tan Yixin; Zhu Lehui; Niu Hongyun; Cai Yaqi; Wu Fengchang; Zhao Xiaoli;

  • 作者单位

    Nanchang Univ Dept Resources Environm &

    Chem Engn Jiangxi 330031 Nanchang Provin Peoples R China;

    Nanchang Univ Dept Resources Environm &

    Chem Engn Jiangxi 330031 Nanchang Provin Peoples R China;

    Chinese Acad Sci Res Ctr Ecoenvironm Sci State Key Lab Environm Chem &

    Ecotoxicol Beijing 100085 Peoples R China;

    Chinese Acad Sci Res Ctr Ecoenvironm Sci State Key Lab Environm Chem &

    Ecotoxicol Beijing 100085 Peoples R China;

    Chinese Res Inst Environm Sci State Key Lab Environm Criteria &

    Risk Assessment Beijing 100012 Peoples R China;

    Chinese Res Inst Environm Sci State Key Lab Environm Criteria &

    Risk Assessment Beijing 100012 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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