One-pot preparation of iron/alumina catalyst for the efficient growth of vertically-aligned carbon nanotube forests

Abstract : 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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https://hal.archives-ouvertes.fr/hal-02185081
Contributor : L2c Aigle <>
Submitted on : Tuesday, July 16, 2019 - 2:03:43 PM
Last modification on : Wednesday, July 17, 2019 - 1:31:02 AM

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  • HAL Id : hal-02185081, version 1

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Arthur Roussey, Nicolas Venier, Hussein Fneich, Lucas Giardella, Thomas Pinaud, et al.. One-pot preparation of iron/alumina catalyst for the efficient growth of vertically-aligned carbon nanotube forests. MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS, 2019, 245, pp.37-46. ⟨hal-02185081⟩

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