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首页> 外文期刊>RSC Advances >Magnetic graphene oxide-nano zero valent iron (GO-nZVI) nanohybrids synthesized using biocompatible cross-linkers for methylene blue removal
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Magnetic graphene oxide-nano zero valent iron (GO-nZVI) nanohybrids synthesized using biocompatible cross-linkers for methylene blue removal

机译：磁性石墨烯氧化物 - 纳米零价铁（Go-NZVI）纳米胺，用于使用生物相容性交联剂合成用于亚甲基蓝色去除剂

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摘要

GO and nZVI have been used for removing different contaminants from aqueous solution; however, difficulty in the separation of GO, and the aggregation propensity of nZVI particles prevent them from having efficient practical applications. In this study, a green synthesis method was performed to prepare nanohybrids of GO and nZVI to provide an adsorbent with high adsorption efficiency that can be removed from aqueous solution easily by magnetic separation. GO-nZVI nanohybrids were synthesized by using biocompatible cross linkers named 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) and N-hydroxysuccinimide (NHS). The effect of the nZVI ratio in the synthesized nanohybrids was studied at three different ratios of GO:nZVI, 1:1, 1:5 and 1:10. SEM/EDS, HRTEM, STEM/EDS, XRD, Raman, FTIR, and TGA analyses were conducted to provide physical and chemical properties of the adsorbents. The performance of nZVI and GO-nZVI nanohybrids as an adsorbent have been studied for methylene blue (MB) removal from an aqueous solution with an initial concentration of 12 mg L-1 at adsorbent dosages of 0.1, 0.3, 0.5, and 1 mg mL(-1). Results indicated that GO-nZVI (1:5) provided the highest MB removal (99.1%) by using 10 mL of the 1 mg mL(-1) adsorbent. After regeneration of the GO-nZVI (1:5) nanohybrids with ethanol, 84.3%, 67.2%, and 63.0% of MB removal were achieved in the first to third regeneration cycle. Results also showed that the GO-nZVI nanohybrids were not affected by aggregation compared to nZVI.
机译：Go和Nzvi已被用于从水溶液中去除不同的污染物;然而，在去分离的情况下，NZVI颗粒的聚集倾向阻止它们具有有效的实际应用。在该研究中，进行绿色合成方法以制备Go和NZVI的纳米苞剂，以提供高吸附效率的吸附剂，其可以通过磁性分离容易地从水溶液中除去。通过使用名为1-乙基-3-（3-二甲基氨基丙基）和N-羟基琥珀酰亚胺（NHS）的生物相容的交联链接合成Go-NZVI纳米嗜含量。在三种不同的GO比例中研究了NZVI比在合成的纳米冬冬胺中的影响：NZVI，1：1,1：5和1:10。进行SEM / EDS，HRTEM，茎/ EDS，XRD，拉曼，FTIR和TGA分析以提供吸附剂的物理和化学性质。作为吸附剂的NZVI和Go-NZVI纳米胺的性能已经研究了从水溶液中除去亚甲基蓝（Mb），初始浓度为0.1,0.3,0.5和1mg mL的吸附剂剂量为12mg L-1 （-1）。结果表明，通过使用10mL的1mg mL（-1）吸附剂，提供了最高的MB去除（99.1％）。在乙醇的Go-NZVI（1：5）的再生后，在第一至第三再生循环中达到84.3％，67.2％和63.0％的MB去除。结果还表明，与NZVI相比，Go-NZVI纳米嗜含量不受聚集的影响。

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  • 来源
    《RSC Advances》 |2019年第2期|共11页
  • 作者

    Mehrabi Novin; Masud Arvid; Afolabi Moyosore; Hwang Jinwoo; Ortiz Gabriel A. Calderon; Aich Nirupam;

  • 作者单位

    SUNY Buffalo Dept Civil Struct &

    Environm Engn Buffalo NY 14260 USA;

    SUNY Buffalo Dept Civil Struct &

    Environm Engn Buffalo NY 14260 USA;

    Georgia Inst Technol Sch Civil &

    Environm Engn Atlanta GA 30332 USA;

    Ohio State Univ Ctr Electron Microscopy &

    Anal Dept Mat Sci &

    Engn Columbus OH 43212 USA;

    Ohio State Univ Ctr Electron Microscopy &

    Anal Dept Mat Sci &

    Engn Columbus OH 43212 USA;

    SUNY Buffalo Dept Civil Struct &

    Environm Engn Buffalo NY 14260 USA;

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