Effects of Liquid Ablation Environment on the Characteristics of TiO2 Nanoparticles
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The objective of this study is to investigate the effects of liquid environment on the properties of TiO2 nanoparticles. TiO2 nanoparticles were synthesized by pulsed laser ablation method in distilled water, acetone, and CTAB. To investigate the structural properties of samples X-ray diffraction pattern, transmission electron microscopy, and scanning electron microscopy were employed. UV–Vis–NIR absorption spectroscopy, FTIR and photoluminescence of TiO2 nanoparticles were used to study their optical properties. Results show that ablation liquid environment has strong effect on size and adhesion of nanoparticles. It is found that ablation of Ti target in distilled water medium leads to formation of smaller size nanoparticles with narrower size distributions in comparison with two other liquid environments. Adhesion of nanoparticles produced in the CTAB and acetone environment are smaller than adhesion of nanoparticles produced in the distilled water environment. Direct bandgap energy of nanoparticles was found to be 3.85, 3.72 and 3.18 eV for sample produced in water, CTAB, and acetone medium respectively. TiO2 nanoparticles were found almost spherical in shape and polycrystalline in all liquids.
KeywordsTiO2 nanoparticles Laser ablation Liquid ablation environment
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