Effect Grinding of Graphite on Structural and Morphological Characteristics of Carbon Nanotubes Grown by Microwave Oven

Abstract

The influence of graphite grinding time on the formation of carbon nanotubes (CNTs), is investigated. Graphite with different grinding time is used for the growth of CNTs by a cost-effective method using a microwave oven. The samples produced using the different grinding time contain nanotubes with an average diameter in the range 31–50 nm as observed by field emission scanning electron microscopy (FESEM). The lowest intensity ratio of D and G bands (ID/IG) and full width at half maximum of G as identified by Raman spectroscopy for grinding time 20 minute indicates the improved crystallinity of CNTs.

Facile and Nondestructive Transformation of Intrinsic Hydrophobic Behavior of a Carbon Nanotubes Sheet to Hydrophilic

“…The G peak corresponding to the tangential stretching mode E 2g with the in-plane motion of a C atom represents a highly ordered graphitic structure. The appearance of a D peak corresponding to the breathing mode of a hexagonal ring of C atoms is a signature of disorder in the structure, and the 2D peak appears as an overtone of D. , The I D / I G ratio of the intensities of the D and G peaks is a measure of the defect level in the CNTs. − A lesser value of I D / I G signifies a lesser amount of defects in the CNTs. The I D / I G values measured for the pristine and NMP-treated CNTs sheets were around of 0.40 and 0.35 respectively, indicating that NMP treatment has not degraded the CNTs or created new defects in the CNTs after NMP treatment.…”