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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：使用生物相容性交联剂合成的磁性氧化石墨烯-纳米零价铁（GO-nZVI）纳米杂合物，用于亚甲基蓝的去除

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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已用于从水溶液中去除不同的污染物。但是，GO的分离困难，nZVI颗粒的聚集倾向使它们无法有效地实际应用。在这项研究中，进行了绿色合成方法来制备GO和nZVI的纳米杂化物，以提供具有高吸附效率的吸附剂，该吸附剂可以通过磁分离轻松地从水溶液中去除。 GO-nZVI纳米杂化物是通过使用生物相容性交联剂1-乙基-3-（3-二甲基氨基丙基）-碳二亚胺（EDC）和N-羟基琥珀酰亚胺（NHS）合成的。在GO 3 ∶nZVI，1 2 ∶1、1、1 2 ∶5和1 2 ∶10的三种不同比率下研究了nZVI比率在合成的纳米杂化物中的作用。进行了SEM / EDS，HRTEM，STEM / EDS，XRD，拉曼，FTIR和TGA分析，以提供吸附剂的物理和化学性质。已经研究了nZVI和GO–nZVI纳米杂化物作为吸附剂的性能，其以0.1、0.3、0.5和0.5的吸附剂剂量从初始浓度为12 mg L〜（？1）的水溶液中去除亚甲基蓝（MB）。 1 mg毫升〜（？1）。结果表明，通过使用10 mL 1 mg mL〜（？1）吸附剂，GO–nZVI（1？：？5）提供了最高的MB去除率（99.1％）。用乙醇再生GO–nZVI（1？：？5）纳米杂化物后，在第一个至第三个再生周期中，分别去除了84.3％，67.2％和63.0％的MB。结果还表明，与nZVI相比，GO–nZVI纳米杂交体不受聚集的影响。

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