催化作用
材料科学
碳纳米管
化学工程
图层(电子)
化学气相沉积
涂层
纳米技术
沉积(地质)
氢氧化物
纳米颗粒
碳纤维
铝
盐(化学)
冶金
复合材料
化学
有机化学
沉积物
生物
古生物学
工程类
复合数
作者
Arthur Roussey,Nicolas Venier,Hussein Fneich,Lucas Giardella,Thomas Pinaud,Said Tahir,Mario Pelaez-Fernandez,Raul Arenal,Ahmad Mehdi,Vincent Jourdain
标识
DOI:10.1016/j.mseb.2019.05.005
摘要
The catalytic growth of vertically-aligned carbon nanotubes (VA-CNTs) forest usually requires thin catalyst films deposited by multi-step and costly physical vapor deposition techniques. Here, we demonstrate that an efficient catalyst and its supporting layer for VACNT growth can be prepared by using a simple solution of Fe(NO3)3 and Al(NO3)3 deposited on silica in a single step. This process being much simpler and cheaper than existing preparation methods, it can easily be transferred to industry for the low-cost, thin and large-area coating of catalyst for VA-CNT growth. Our study shows that aluminum hydroxides preferentially react with the SiO2 surface while iron hydroxides tend to form oxide or hydroxide nanoparticles, thus allowing preparation of an aluminum-based buffer layer with iron-based nanoparticles at its surface. Optimization of the Fe/Al ratio and salt concentrations yielded catalysts with performances similar to standard Fe/Al2O3 catalysts prepared by physical vapor deposition.
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