A hybrid nitrogen-doped graphene nanosheet-grafted double-walled carbon nanotube (NG-DWCNT) was synthesized by chemical vapor deposition (CVD). Double-walled carbon nanotube (DWCNT) was synthesized by floating catalytic CVD using ferrocene and thiophene dissolved in ethanol. NG was directly grafted onto the DWCNT bundles by thermal CVD using mixed ethanol-urea solution. The NG possess sharp-edged petal-like structure on one-dimensional DWCNT bundle. The NG-DWCNT showed the nitrogen content of approximately 1.93 at%. The NG-DWCNT hybrid nanostructures exhibited a higher specific capacitance of 563 F g⁻¹ than that of the DWCNT and un-doped G-DWCNT. The improvement of capacitance value is attributed to the synergic effect of the nitrogen doping together with the sharp-edged petal-like structure of the NG. The facile technique by CVD method provides a promising approach for simple and low-cost technique to synthesize the NG-DWCNT hybrid nanostructures. A hybrid carbon nanostructure of NG-DWCNT has a potential application in electrochemical conversion and energy storage devices.

通过化学气相沉积 (CVD) 合成了混合氮掺杂石墨烯纳米片接枝的双壁碳纳米管 (NG-DWCNT)。使用溶解在乙醇中的二茂铁和噻吩，通过浮动催化 CVD 合成双壁碳纳米管 (DWCNT)。使用混合乙醇-尿素溶液通过热 CVD 将 NG 直接接枝到 DWCNT 束上。NG在一维DWCNT束上具有锋利的花瓣状结构。NG-DWCNT 的氮含量约为 1.93 at%。NG-DWCNT 混合纳米结构表现出更高的比电容 563 F g ^-1与 DWCNT 和未掺杂的 G-DWCNT 相比。电容值的提高归因于氮掺杂与NG的尖锐花瓣状结构的协同效应。CVD 方法的简便技术为合成 NG-DWCNT 混合纳米结构的简单且低成本的技术提供了一种有前途的方法。NG-DWCNT 的混合碳纳米结构在电化学转换和储能设备中具有潜在的应用。