Growth Time Influence on Optical and Electrical Properties of TiO2 Nanorods Prepared via Hydrothermal Method

Abstract

On a fluorine doped tin oxide (F: SnO2) coated glass substrate, TiO2 nanorod arrays (NRAs) were produced, successfully generated hydrothermally with an extended period of time (4, 6, 10, 20 and 30 h). Growth time and their effects on, morphological, structural, optical, and electrical characteristics of Titanium dioxide nanorods (NRs) were investigated by, Field Emission Scanning Electron Microscopy, X-ray Diffraction, Fourier Transform Infrared spectroscopy and ultraviolet-visible spectroscopy methods. X-ray diffraction revealed the development of TiO2 nanorods in the tetragonal rutile structure of the produced TiO2 NRs with the maximum (002) peak strength. NRs had a tetragonal shape with square top facets, according to images showed by a Field-Emission Scanning Electron Microscope (FESEM). The range of nanorods’ diameter were detected to be (40.05-225.26) nm, respectively based on FESEM measurements. While Fourier Transform Infrared spectroscopy (FT-IR) showed a wide, band about 2952 cm-1. TiO2 NRs’ optical and electrical characteristics have been investigated. According to optical absorption tests, there was no discernible change in band distance with increasing growth time. For TiO2 nanorods primed with 4, 6, 10, 20 and 30 hours of reaction period, the band gap energy was found to be 3.14, 3.0, 3.12, 3.1, and 3.09 eV. The value of the energy gap reduced as reaction time increased from 4 to 30 hours, then increased as reaction time increased.