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Triethylenetetramine-modified hollow Fe3O4/SiO2/chitosan magnetic nanocomposites for removal of Cr(VI) ions with high adsorption capacity and rapid rate
Microporous and Mesoporous Materials ( IF 4.8 ) Pub Date : 2020-01-24 , DOI: 10.1016/j.micromeso.2020.110041
Xiang Wang , Xijian Liu , Changwei Xiao , Hang Zhao , Minyi Zhang , Nannan Zheng , Wenyan Kong , Ling Zhang , Haikuan Yuan , Lijuan Zhang , Jie Lu

In our work, the triethylenetetramine-modified hollow Fe3O4/SiO2/chitosan magnetic nanocomposites (Fe3O4/SiO2/CS-TETA) were successfully fabricated by a facile way. Due to hollow and porous nano structure, as well as modification by TETA, the Fe3O4/SiO2/CS-TETA nanocomposites have more and stronger adsorption sites for chromium ions. The adsorption capacity of Cr(VI) ions was as high as 254.6 mg g-1 and the adsorption equilibrium time was within 15 min, which are much superior than most similar adsorbents. In addition, the good magnetic recovery and reuse of the hollow Fe3O4/SiO2/CS-TETA nanocomposites gives them excellent practical application capabilities for removal of Cr(VI) ions from wastewater. Thus, hollow Fe3O4/SiO2/CS-TETA nanocomposites can be used as an ideal adsorbent for the recycle removal of Cr(VI) ions from wastewater.



中文翻译:

三亚乙基四胺改性的中空Fe 3 O 4 / SiO 2 /壳聚糖磁性纳米复合材料具有高吸附能力和高速率去除Cr(VI)离子

在我们的工作中,通过简便的方法成功地制备了三亚乙基四胺改性的空心Fe 3 O 4 / SiO 2 /壳聚糖磁性纳米复合材料(Fe 3 O 4 / SiO 2 / CS-TETA)。Fe 3 O 4 / SiO 2 / CS-TETA纳米复合材料由于具有中空多孔的纳米结构以及经TETA改性,对铬离子的吸附位点越来越强。Cr(VI)离子的吸附容量高达254.6 mg g -1,并且吸附平衡时间在15分钟内,这比大多数相似的吸附剂要好得多。此外,空心铁具有良好的磁性回收和再利用3 O 4 / SiO 2 / CS-TETA纳米复合材料具有出色的实际应用能力,可从废水中去除Cr(VI)离子。因此,中空的Fe 3 O 4 / SiO 2 / CS-TETA纳米复合材料可以用作从废水中循环去除Cr(VI)离子的理想吸附剂。

更新日期:2020-01-24
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