Study of the Optical, Structural and Adsorption Properties of Tellurium Oxide Nanoparticles and Graphene Nanosheets Prepared by Q-Switched Nd-YAG pulsed Laser"

Document Type : Research Paper


1 department of laser physics, College of Science for Woman, Babylon University, Hilla, Babil. Iraq

2 Department of human anatomy, College of Medicine, University of Babylon, Hilla, Babylon/ Iraq


Tellurium oxide nanoparticles (TeO2NPs) and graphene nanosheets ( GNS ) were synthesized using a Q-Switched Nd-YAG Pulsed Laser in Liquid ( PLAL) with a wavelength of 1064 nm, number of pulses 500, an energy per pulse of 80 mJ, a frequency of 6 Hz, and a pulse duration of 10 nsec. X-ray diffraction, FTIR, scanning electron microscopy (SEM), EDX, and UV-Vis Spectroscopy were all used to analyze TeO2NPs and GNS. TeNPs were produced with a crystallite size of 39.6 nm. All of the reflections peaks can be indexed on a tetragonal α-TeO2. XRD results show obtaining graphene nanosheet (GNS) from graphite using pulsed laser ablation in liquid. SEM results showed that spherical nanoparticles were obtained, and it was noted that there were some agglomerates with an average particle size of 65 nm. This is for TeO2NPs, as for graphene, it was observed that graphene sheets were obtained. EDX results showed the presence of some impurities in the samples prepared for TeO2NPs and GND. The results of FTIR showed that there is an absorption band at 561.5 cm1 for TeO2NPs and 1643 cm-1 for graphene, respectively. The UV-visible spectroscopy results showed that there is a peak absorption at 292 nm with an energy gap of 1.4 eV for TeO2NPs and 266 nm for graphene sheet, respectively.