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A corn stalk-derived porous carbonaceous adsorbent for adsorption of ionic liquids from aqueous solution

机译：用于吸附来自水溶液的离子液体的玉米茎衍生的多孔碳质吸附剂

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摘要

Corn stalks were used to prepare a porous carbonaceous material with a high surface area of 2442 m(2) g(-1) by the hydrothermal carbonization of corn stalks followed by chemical activation. The prepared corn stalk-derived carbonaceous material (CSCM) was used for the adsorption of ionic liquids (ILs), and showed super performance for the adsorption of ILs from aqueous solution and adsorption capacities of 0.52 and 2.41 mmol g(-1) were obtained for [Bmim]Cl and [Bmim][NTf2], respectively. Adsorption was fast that the equilibrium could be reached within about 1 min. The influence of the chemical structure of different ILs on the adsorption onto the CSCM adsorbent was examined where it was revealed that the adsorption capacities of the CSCM for a series of ILs increased with increasing the length of the alkyl chain of the imidazolium cation and the hydrophobicity of the IL anions, followed the sequence of Cl- < [TFA](-) < [BF4](-) < [OTf](-) < [PF6](-). The results of this work provide a facile method for the preparation of a highly efficient adsorbent from renewable agricultural waste that has potential applications in the environmental and chemical fields.
机译：用玉米秸秆的水热碳化随后通过化学活化制备玉米秸秆，制备具有2442米（2）克（-1）的高表面积为2442米（2 )g（-1）的碳质材料。使用制备的玉米茎衍生的碳质材料（CSCM）用于吸附离子液体（ILS），并显示出从水溶液中吸附ILS的超级性能，并获得0.52和2.41mmol G（-1）的吸附容量对于[BMIM] CL和[BMIM] [NTF2]。吸附速度快，即在约1分钟内可以达到平衡。检查不同ILS对CSCM吸附剂吸附到CSCM吸附剂上的化学结构的影响，其中揭示了CSCM对一系列ILS的吸附能力随着咪唑鎓阳离子和疏水性的烷基链的长度而增加IL阴离子，遵循Cl- <[TFA]（ - ）<[BF4]（ - ）<ε（ - ）<[PF6]（ - ）的序列。该作品的结果提供了一种适用于制备从环境和化学领域具有潜在应用的可再生农业废物高效吸附剂的容易方法。

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  • 来源
    《RSC Advances》 |2016年第39期|共9页
  • 作者

    Wang Yu; Shen Feng; Qi Xinhua;

  • 作者单位

    Chinese Acad Agr Sci Agroenvironm Protect Inst Minist Agr 31 Fukang Rd Tianjin 300191 Peoples R China;

    Chinese Acad Agr Sci Agroenvironm Protect Inst Minist Agr 31 Fukang Rd Tianjin 300191 Peoples R China;

    Chinese Acad Agr Sci Agroenvironm Protect Inst Minist Agr 31 Fukang Rd Tianjin 300191 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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