Characterization of Chitosan-Titanium Oxide-Silver Nanocomposite Synthesized by Pulsed Laser Ablation in Liquid

Abstract

Chitosan-titanium oxide-silver CS-TiO2 -Ag nanocomposite was successfully synthesized using pulsed laser ablation in liquid with a frequency of 1 Hz and energy of 500 mJ, and the number of pulses of titanium and silver plates was 1000 and 500, respectively. The resulting nanocomposite was characterized using various techniques, including FTIR, UV-vis, X-ray diffraction, and SEM. The FTIR analysis showed that the chemical bonds of chitosan were superimposed with silver and titanium oxide. UV-vis spectrum showed that the absorbance peaks for CS-Ag and CS-TiO2 at 399.9 nm and 242 nm, respectively, and the calculating energy gaps of the CS-TiO2 ,CS-Ag and CS-TiO2 -Ag nanocomposites are found to be (4.18 , 2.82 and 2.74 ) eV, respectively. The SEM images for CS-TiO2 -Ag showed that the shape as semi-spherical, and the average grain size of the nanoparticles is 95 nm. Moreover, the X-ray diffraction analysis revealed that TiO2 and Ag were polycrystalline and that the average crystallite sizes for CS-Ag, CS-TiO2 , and CS-TiO2 -Ag were 5.96, 5.96, and 5.95 nm, respectively. This study demonstrated that pulsed laser ablation in liquid is an easy and safe method for synthesizing CS-TiO2 -Ag nanocomposites that can be used in various applications. The characterization techniques used in this study provided valuable insights into the properties and structures of the synthesized nanocomposite material.