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Templated synthesis of nitrogen-doped graphene-like carbon materials using spent montmorillonite

机译：使用Chent Montmorililonite的模特合成氮掺杂石墨烯样碳材料

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摘要

Montmorillonite (Mt) as an environmentally-friendly, low-cost, and highly-efficient adsorbent for cationic dyes has a promising application in dye wastewater treatment. However, proper disposal of the spent Mt is still a challenge holding back the wide application of Mt. This article reports a simple method which can synthesize N-doped graphene-like carbon materials using the spent Mt after the adsorption of crystal violet (CV). The spent Mt was pyrolyzed under the protection of N-2 to carbonize the adsorbed CV within the interlayer space of Mt, and the interlayer spacing of Mt decreased from 11.0 angstrom to approximately 3.6 angstrom, close to the thickness of a single graphene layer (3.4 angstrom). After demineralization (i.e., washing with a mixture of HF and HCl), the carbon material was released from the interlayer space of Mt. Raman spectra showed the presence of both the D-band and G-band on the obtained carbon materials, and transmission electron microscopy observed the thin layers of carbon material. X-ray photoelectron spectroscopy results indicated the simultaneous presence of pyridinic, pyrrolic, and quaternary N on the carbon materials. In addition, the percentage of pyridinic N increases with increasing pyrolysis temperature; whereas that of quaternary N decreases and of pyrrolic N remains relatively constant. The above results suggested the successful synthesis of N-doped graphene-like carbon material. Finally, the obtained materials show interesting electrocatalytic activity for the oxygen reduction reaction and show potential to be used as efficient metal-free electrocatalysts in fuel cells.
机译：Montmorillonite（MT）作为阳离子染料的环保，低成本和高效的吸附剂在染料废水处理中具有有希望的应用。然而，仍然适当处理的使用MT仍然是持有MT的广泛应用的挑战。本文报告了一种简单的方法，可以使用在晶体紫（CV）吸附后使用Chent MT合成N掺杂的石墨烯样碳材料。在N-2的保护下碳化的MYR被热解，以碳化在MT的中间层空间内的吸附性CV，并且MT的层间间距从11.0埃到大约3.6埃倾斜下降，接近单个石墨烯层的厚度（3.4埃）。脱矿质后（即用HF和HCl的混合物洗涤），碳材料从Mt的层间空间中释放。拉曼光谱显示在所得碳材料上的D频带和G波段的存在，以及透射电子显微镜观察薄层碳材料。 X射线光电子能谱结果表明碳材料上同时存在吡啶，吡咯和季N.此外，吡啶n的百分比随着热解温而增加;虽然四元数n降低，但吡咯n保持相对恒定。上述结果表明，成功合成了N掺杂的石墨烯样碳材料。最后，所获得的材料显示出氧还原反应的有趣电催化活性，并显示出在燃料电池中用作有效的无金属电催化剂的潜力。

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  • 来源
    《RSC Advances》 |2015年第10期|共7页
  • 作者

    Zhu Runliang; Chen Qingze; Wang Xin; Wang Shuangyin; Zhu Jianxi; He Hongping;

  • 作者单位

    Chinese Acad Sci Guangzhou Inst Geochem Guangdong Prov Key Lab Mineral Phys &

    Mat Res &

    D CAS Key Lab Mineral &

    Metallogeny Guangzhou 510640 Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Geochem Guangdong Prov Key Lab Mineral Phys &

    Mat Res &

    D CAS Key Lab Mineral &

    Metallogeny Guangzhou 510640 Guangdong Peoples R China;

    Hunan Univ State Key Lab Chem Biosensing &

    Chemometr Coll Chem &

    Chem Engn Changsha 410082 Hunan Peoples R China;

    Hunan Univ State Key Lab Chem Biosensing &

    Chemometr Coll Chem &

    Chem Engn Changsha 410082 Hunan Peoples R China;

    Chinese Acad Sci Guangzhou Inst Geochem Guangdong Prov Key Lab Mineral Phys &

    Mat Res &

    D CAS Key Lab Mineral &

    Metallogeny Guangzhou 510640 Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Geochem Guangdong Prov Key Lab Mineral Phys &

    Mat Res &

    D CAS Key Lab Mineral &

    Metallogeny Guangzhou 510640 Guangdong Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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