Oct 15, 2013

Single walled carbon nanotube-metal oxide nanocomposites for reversible and reproducible storage of hydrogen

ACS Applied Materials & Interfaces
D SilambarasanK Iyakutti

Abstract

Composite material consisting of single walled carbon nanotubes (SWCNTs) and metal oxide nanoparticles has been prepared and their hydrogen storage performance is evaluated. Metal oxides such as tin oxide (SnO2), tungsten trioxide (WO3), and titanium dioxide (TiO2) are chosen as the composite constituents. The composites have been prepared by means of ultrasonication. Then, the composite samples are deposited on alumina substrates and at 100 °C in a Sieverts-like hydrogenation setup. Characterization techniques such as transmission electron microscopy (TEM), Raman spectroscopy, scanning electron microscopy (SEM), powder X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, energy dispersive spectroscopy (EDS), CHN elemental analysis, and thermogravimetric (TG) measurements are used to analyze the samples at various stages of experiments. Hydrogen storage capacity of the composites namely, SWCNT-SnO2, SWCNT-WO3, and SWCNT-TiO2 are found to be 1.1, 0.9, and 1.3 wt %, respectively. Hydrogenated composite samples are stable at room temperature and desorption of hydrogen is found to be 100% reversible. Desorption temperature ranges and binding energy ranges of hydrogen have been measured from the desorption studie...Continue Reading

Mentioned in this Paper

Pigment Dispersion Syndrome (Disorder)
X-Ray Diffraction
Energy Dispersive Spectroscopy
Spectrum Analysis
Nanotubes, Carbon
Surgical Pathology Scanning Electron Microscopy
Scanning Electron Microscopy
Spectrum Analysis, Raman
Transmission Electron Microscopy
Titanium dioxide

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