材料科学
扫描电子显微镜
化学工程
结晶度
碳化硅
化学气相沉积
微观结构
硅
场发射显微术
拉曼光谱
介孔材料
透射电子显微镜
催化作用
纳米技术
复合材料
冶金
衍射
有机化学
化学
工程类
物理
光学
作者
Saheed A. Ganiyu,Oki Muraza,Abbas Saeed Hakeem,Khalid Alhooshani,Muataz Ali Atieh
标识
DOI:10.1016/j.cej.2014.05.150
摘要
Carbon nanostructures (CNSs) in the form of fibers and spheres have been successfully grown on 3 dimensional (3D) macroscopic silicon carbide (SiC) foams with the aid of mesoporous silica-films as interfacial layer via ethylene decomposition on nickel and iron as growth catalysts using chemical vapor deposition (CVD). The effect of growth temperature from 600 to 900 °C on morphology, diameter and specific surface area of as-grown CNSs was studied. The as-grown CNSs were characterized by field emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM) to examine the morphology, diameter, microstructure and defect. Crystallinity and degree of graphitization were determined by X-ray diffraction and Raman spectrometer. Textural properties such as specific surface area, pore size and pore volume were measured by nitrogen gas adsorption–desorption. Uniform distribution of CNSs on 3D SiC-foam was obtained at 700 °C for short synthesis time (30 min), as well as high surface area of above 100 m2/g. Degree of graphitization of CNSs grown on modified SiC substrates by using Ni as growth catalyst was higher than the one with the Fe-growth catalyst.
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