Abstract
Green catalyst derived from plants, a cheap and abundant natural source, is used for the synthesis of multi-walled carbon nanotubes (MWNTs). The concept is unconventional and practically realized into existence by simple CVD growth while keeping away the potential hazards caused by metal catalyst on environment and living organisms. The notable points to mention of such growth are: (1) grown CNTs are free from toxic metal catalyst, (2) low growth temperature (575 °C) required and produced high yield vis-à-vis any other catalyst used so far reported, and (3) no need of expensive and complex systems for its synthesis. Besides, growth of SWNT as well as carbon nano-belts with hollow rectangular cross-section is observed when growth temperature increased to 800 °C, specifically, for the wall-nut extract. The samples were characterized by microscopic and spectroscopic analysis and the results verified our study. The present work provides innovative technique and may open up new avenues for CNTs synthesis and its applications.
Highlights
Since the discovery of carbon nanotubes in 1990 (Iijima 1991), CNTs trigger the real field of nanotechnology due its remarkable physical and chemical properties
Growth of SWNT as well as carbon nano-belts with hollow rectangular cross-section is observed when growth temperature increased to 800 °C, for the wall-nut extract
An unconventional concept is employed for the synthesis of CNTs, where extract from green plant is used as catalyst
Summary
Synthesis of carbon nanotubes using green plant extract as catalyst: unconventional concept and its realization. Received: 8 August 2017 / Accepted: 11 September 2017 / Published online: 16 September 2017 Ó The Author(s) 2017.
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