Abstract
In this work, the effect of γ-irradiation with 1.25 MeV average energy (Co-60) was studied on the structural, optical and morphological properties of chemical vapour deposited MWCNTs at 10–60 kGy dose. The XRD spectra with the peak at 2θ ~ 26.08° of (002) plane confirm the MWCNTs formation and conspicuous modifications were observed after γ- irradiation. The UV–Vis studies show that the UV lower wavelength shifts towards the higher region with increasing γ- dose, bandgap decreasing from 3.57 eV to 3.33 eV (372 nm–347 nm) because of the generation of charge trapping of the radiolytic holes or electrons, which change the valence and conduction bandgap in electronic states. The FTIR results provided confirmation of the attachment of hydroxyl and carboxyl functional groups to the MWCNTs sidewalls whereas after γ- irradiation caused significant changes in the structure of the sidewalls of MWCNTs. The Raman spectra confirmed the ID/IG ratio decreases after γ- irradiation which is due to the enhancement in defects through the interaction between MWCNTs and photons during γ-irradiation. The TEM and FESEM results confirmed the inter-mingling or agglomeration of the network of nanotubes having varying diameters of about 40–60 nm on account of the interaction of γ-ray. SAED pattern shows a dispense halo pattern due to the presence of amorphous carbon.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
