Abstract
3D hybrid nanostructures connecting 1D carbon nanotubes (CNTs) with 2D graphene have attracted more and more attentions due to their excellent chemical, physical and electrical properties. In this study, we firstly report a novel and facile one-step process using template-directed chemical vapor deposition (CVD) to fabricate highly nitrogen doped three-dimensional (3D) N-doped carbon nanotubes/N-doped graphene architecture (N-CNTs/N-graphene). We used nickel foam as substrate, melamine as a single source for both carbon and nitrogen, respectively. The morphology and microstructure were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, isothermal analyses, X-ray photoelectron microscopy and Raman spectra. The obtained 3D N-CNTs/N-graphene exhibits high graphitization, a regular 3D structure and excellent nitrogen doping and good mesoporosity.
Highlights
A viable approach to achieving a robust 3D hybrid architecture is by integrating different low-dimensional nanostructures [1]
We reported, for the first time, one-step chemical vapor deposition (CVD) method to synthesize three-dimensional nanostructure consisting of N-doped carbon nanotubes/N-doped graphene (N-Carbon nanotubes (CNTs)/N-graphene) can be grown on a nickel foam substrate using low-cost material melamine as a single source for both carbon and nitrogen, respectively
The N-CNTs/N-graphene are synthesized from one-dimensional N-doped carbon nanotubes and two-dimensional N-doped graphene which grown on the surface of nickel foam possessing interconnected porous 3D structure at 800 ◦C
Summary
A viable approach to achieving a robust 3D hybrid architecture is by integrating different low-dimensional nanostructures [1]. Owing to the unique mechanical strength, large surface-to-volume ratio and high electrical property, CNTs have become a promising choice for potential applications, such as energy storage [12], supercapacitors, batteries [13] and nanoelectronic devices [14]. The synthesis of three-dimensional carbon architectures from CNT and graphene effectively reduces the aggregation and stacking which occur among layers of graphene and CNTs [15]. 3D carbon architectures built from CNTs and graphene has attracted numerous attention [16,17,18,19] due to the extraordinary mechanical and electrical properties and potential possibilities in a variety of applications for example, lithium-sulfur batteries [20], supercapacitors [21] and energy storage [22] The synthesis of three-dimensional carbon architectures from CNT and graphene effectively reduces the aggregation and stacking which occur among layers of graphene and CNTs [15]. 3D carbon architectures built from CNTs and graphene has attracted numerous attention [16,17,18,19] due to the extraordinary mechanical and electrical properties and potential possibilities in a variety of applications for example, lithium-sulfur batteries [20], supercapacitors [21] and energy storage [22]
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