Single step process for the synthesis of carbon nanotubes and metal/alloy-filled multiwalled carbon nanotubes
Department of Physics, Alternative Energy Technology Laboratory, Indian Institute of Technology Madras, Chennai, Tamilnadu, 600036, India
Nanoscale Research Letters 2007, 2:75-80 doi:10.1007/s11671-006-9033-5Published: 6 January 2007
A single-step approach for the synthesis of multi-walled nanotubes (MWNT) filled with nanowires of Ni/ternary Zr based hydrogen storage alloy has been illustrated. We also demonstrate the generation of CO-free hydrogen by methane decomposition over alloy hydride catalyst. The present work also highlights the formation of single-walled nanotubes (SWNT) and MWNTs at varying process conditions. These carbon nanostructures have been characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution TEM (HRTEM), Energy dispersive X-ray analysis (EDX) and Raman spectroscopy. This new approach overcomes the existing multi-step process limitation, with possible impact on the development of future fuel cell, nano-battery and hydrogen sensor technologies.