A doable, low cost, green and scalable method is demonstrated to synthesize N-doped graphene/CNTs composite using humic acid (HA) and urea via ball mill technique. The structural characterizations were investigated by scanning electron microscopy (SEM), Raman spectroscopy, and X-ray diffraction (XRD). SEM investigations reveal a highly porous morphology of the synthesized powder. It was also observed that, some carbon nanotubes were unzipped as well as completely opened CNTs due to the synthesis process. Additionally, this study found that urea and HA crucially impacted synthesis process. N-doping was confirmed by EDX measurements and a remarkable enhancement in surface area was detected using surface area sorption (BET) analyzer. The presented method is very practical and can be scaled up for industrial applications with recyclable materials. By optimizing the preparation conditions, it is possible to achieve a significant impact toward enhancing the desired properties of the synthesized nanocomposite.

证明了一种可行的，低成本，绿色和可扩展的方法，该方法可通过球磨技术使用腐殖酸（HA）和尿素合成N掺杂的石墨烯/ CNTs复合材料。通过扫描电子显微镜（SEM），拉曼光谱和X射线衍射（XRD）研究了结构特征。SEM研究表明，合成粉末具有高度多孔的形态。还观察到，由于合成过程，一些碳纳米管被解压缩以及完全打开的CNT。此外，这项研究还发现尿素和HA对合成过程具有至关重要的影响。通过EDX测量证实了N掺杂，并且使用表面积吸收（BET）分析仪检测到表面积显着增加。所提出的方法是非常实用的，并且可以利用可回收材料扩大到工业应用。