Abstract
TiO2 nanoparticles and TiO2@MWCNTs nanocomposites were created using pulsed Nd: YAG laser ablation in liquid. The former was prepared by laser ablation of Ti target immersed in water with laser energy of 120 mJ at 100 pulses, while the latter was achieved by irradiating a mixture of as-prepared TiO2NPs, and different concentrations ratios (8, 16, and 25) % of carbon nanotubes with laser energy of 100 mJ at 25 pulses. Fourier transformed infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), and Transmission electron microscopy (TEM) analysis exhibited the variation in the structure of the nanocomposites. The FTIR results demonstrated the formation of nanocomposites. Raman spectra results displayed that the crystalline phase of nanocomposites contains two major phases: anatase and brookite. XRD results revealed the diffraction peaks of the titanium oxide for both anatase and brookite phases, in addition to the carbon nanotube peaks. TEM images confirmed that the titanium oxide nanoparticles are attached to the walls of MWCNTs, and completely covered by graphene sheets. The energy bandgap value of TiO2NPs decreased from (3.7–3.35) eV with the addition of different concentration ratios of MWCNTs. Zeta potential results of the nanocomposites showed an increase as the concentration ratios of MWCNTs increased. Hence, this method is ideal for creating contamination-free nanostructures of various morphologyic and sizes that can be used in a variety of field in the future.
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Khashan, K.S., Hadi, A.A. & Hasan, I.F. Green synthesis of TiO2@MWCNTs composites by pulsed laser ablation in liquid. Appl. Phys. A 128, 835 (2022). https://doi.org/10.1007/s00339-022-05984-1
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DOI: https://doi.org/10.1007/s00339-022-05984-1