氧化石墨烯基复合材料对Cr(Ⅵ)的吸附研究

李冬坤1, 单凤君1, 王双红2

化工新型材料 ›› 2019, Vol. 47 ›› Issue (2) : 149 -153.

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化工新型材料 ›› 2019, Vol. 47 ›› Issue (2) : 149-153.
科学研究

氧化石墨烯基复合材料对Cr(Ⅵ)的吸附研究

    李冬坤1, 单凤君1, 王双红2
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GO based composite for adsorption of Cr(Ⅵ) in aqueous solution

  • Li Dongkun1, Shan Fengjun1, Wang Shuanghong2
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摘要

以氧化石墨烯(GO)、氧化铈(CeO2)和改性壳聚糖(DCS)为原料,采用溶液共混法合成氧化石墨烯基复合材料(DCG)。研究了DCG对Cr(Ⅵ)的静态吸附性能,考察了DCG用量、Cr(Ⅵ)质量浓度、吸附时间和吸附温度对吸附效果的影响。实验结果表明,DCG质量浓度为2g/L、废水中Cr(Ⅵ)质量浓度为20mg/L、吸附温度为25℃、吸附时间为90min时吸附效果最好。傅里叶变换红外光谱、扫描电子显微镜和X射线衍射分析表明,DCG为较厚的片层结构,片层表面附着大量点状物,羟基、羧基和氨基为主要活性吸附位点。复合材料DCG明显改变了GO、CeO2和DCS三者的团聚性和亲水性,充分发挥了各自的吸附性能。

Abstract

Graphene oxide (GO),ceria(CeO2) and modified chitosan (DCS) were used as the raw materials,GO based composite was synthesized via mix-solution.The static adsorption property of Cr in the solution was investigated.Then the different experimental parameters,such as DCG dosage,the initial Cr(Ⅵ) concentration,the adsorption time and temperature were examined to investigate their effects on adsorption of chromium by DCG.The results showed that when DCG dosage,the initial concentrtion of Cr(Ⅵ) in wastewater,adsorption time and temperature were 2g/L,20mg/L,25℃and 90min respectively,the adsorption performance was well.FT-IR,SEM and XRD analysis indicated that DCG was a thicker lamellar structure,and a large number of spots were attached to the lamellae surface.The hydroxyl,carboxyl and amino groups were the main sites of active adsorption.The aggregation and hydrophilicity of GO,CeO2 and DCS were well changed in DCG.Therefore,the DCG composite brought into full play the adsorption properties.

关键词

氧化石墨烯 / 改性壳聚糖 / 氧化铈 / 吸附

Key words

graphene oxide / modified chitosan / ceria / adsorption

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氧化石墨烯基复合材料对Cr(Ⅵ)的吸附研究[J]. 化工新型材料, 2019, 47(2): 149-153 DOI:

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