Journal
DIAMOND AND RELATED MATERIALS
Volume 91, Issue -, Pages 98-106Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.diamond.2018.11.012
Keywords
Carbon nanotubes; Bio-char; Microwave-assisted CVD; Carbon structure
Categories
Funding
- National Natural Science Foundation of China [21676132, 21476100]
Ask authors/readers for more resources
Microwave-assisted chemical vapor deposition (CVD) was employed for the synthesis of carbon nanotubes (CNTs) on pine nut shell (PNS) chars. The impact of reaction temperature, catalyst, carbon source, and the renewable carbon substrate on the synthesis of the CNTs were investigated. Microwave irradiation, the type of carbon source, and the presence of nickel catalyst were found to be the governing factors during the formation and growth of CNTs at low temperatures. 600 degrees C was found to be the optimum temperature for the formation of the CNTs. The high-resolution transmission electron microscope (HRTEM) results showed that the CNTs synthesized at 600 degrees C had a multiwall structure and a d-spacing of 0.34 nm. The diameter and length of CNTs were similar to 50 nm and 2600-3200 nm, respectively. Raman spectroscopy analysis revealed that a high degree of carbon order was achieved at 600 degrees C due to the formation of CNTs on the surface of bio-char. The formation and growth mechanisms of CNTs under microwave irradiation were proposed and discussed.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available