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首页> 外文期刊>RSC Advances >Amine-rich ionic liquid grafted graphene for sub-ambient carbon dioxide adsorption
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Amine-rich ionic liquid grafted graphene for sub-ambient carbon dioxide adsorption

机译：富含胺的离子液体嫁接石墨烯，用于亚环境二氧化碳吸附

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摘要

The present study describes the synthesis of the adsorptivity based amine-rich ionic liquid (ARIL), namely, 3,5-diamino-1-methyl-1,2,4-triazolium tetrafluoroborate grafted graphene (HEG/ARIL), and its application in carbon dioxide adsorption. This ionic liquid occurs in the solid form at standard atmospheric temperature and pressure, and forms solid-like short range ordering on a graphitic substrate. Molecular vibrational spectroscopy suggests that the ARIL molecules are physically adsorbed on the graphene surface with no detectable chemical interactions. The CO2 adsorption on ARIL is not significantly accompanied by chemical interaction with the amine groups under sub-ambient conditions. The adsorption capacity of ARIL attained a significant improvement when it was grafted onto graphene. The favourability and energy of adsorption suggest that the cumulative interaction of CO2 with ARIL moieties is weaker than that with residual oxygen-containing functional groups in graphene. The adsorbate retention of graphene is largely increased upon grafting ARIL. The isosteric heat and entropy of CO2 adsorption on the HEG/ARIL is lower than that found on pristine HEG. Conclusively, ARIL functionalization improved the CO2 adsorption capacity and decreased the interaction energy between CO2 and graphene, because it enhances the density of the low affinity adsorption sites.
机译：本研究描述了富含吸附型胺类离子液体（ArIL）的合成，即3,5-二氨基-1-甲基-1,2,4-三唑四氟硼酸盐接枝石墨烯（HEG / ARIN）及其应用在二氧化碳吸附中。该离子液体在标准大气温度和压力下以固体形式发生，并在石墨基材上形成固体的短距离排序。分子振动光谱表明ArIL分子物理上吸附在石墨烯表面上，没有可检测的化学相互作用。在亚环境条件下，基础上的CO 2吸附不显着伴随与胺基的化学相互作用。当将其移植到石墨烯上时，ArIL的吸附容量达到了显着的改善。吸附的增强性和能量表明CO2与芳基部分的累积相互作用比石墨烯中的残留含氧官能团的累积相互作用较弱。在嫁接基础上，石墨烯的吸附保留在很大程度上增加。 HEG / ARIN上的CO2吸附的梭形热量和熵低于原始HEG上发现的CO 2吸附。结论，Ari官能化改善了CO 2吸附能力并降低了CO 2和石墨烯之间的相互作用能量，因为它增强了低亲和力吸附位点的密度。

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  • 来源
    《RSC Advances》 |2016年第4期|共9页
  • 作者

    Tamilarasan P.; Ramaprabhu S.;

  • 作者单位

    IITM Dept Phys NFMTC AENL Madras Tamil Nadu India;

    IITM Dept Phys NFMTC AENL Madras Tamil Nadu India;

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