Surface compositional, structural and optical properties of nanohybrid TiO2/ZnO coated silicone surface

• Main Authors: Abdullah, S. (Author), Achoi, M.F (Author), Gambar, M.Z.M (Author), Rusop, M. (Author)
• Format: Article
• Language: English
• Published: Institute of Physics Publishing 2013
• Subjects: Crystallite size; Different precursors; Energy gap; Field emission scanning electron microscopes; Molar concentration ratio; Molecular concentration; Morphological characterization; Nanostructured materials; Nanotechnology; Optical band gap energy; Optical band gaps; Optical properties; Oxide minerals; Scanning electron microscopy; Silicones; Sol-gel spin coating; Sol-gels; Structural and optical properties; Titanium; Titanium dioxide; Titanium oxides; X ray diffraction; Zinc; Zinc oxide
• Online Access: View Fulltext in Publisher; View in Scopus
• ISBN: 17426588 (ISSN)
• DOI: 10.1088/1742-6596/431/1/012012

This paper reports on preparation and characterizations of nanohybrid TiO2/ZnO using sol-gel spin-coating techniques. The study involved of modification band-gap energy of Titanium dioxide (TiO2) at different precursor molecular concentration of Zinc oxide (ZnO). The Field Emission Scanning Electron Microscope (FESEM) for morphological characterization showed the existence of TiO2 and ZnO particles at 20 nm scale of magnification. The compositional of both particles were then confirmed using Energy Disperse Analyzer X-Ray (EDAX) analysis which indicates the elements of Ti, O and Zn exhibited EDAX spectras at about 0.5 and 1.0 keV while silicone (Si) at 1.75 keV. The X-Ray diffraction (XRD) characterized the structural properties of anatase and rutile for TiO2, and zincite for ZnO, then crystallite size for both elements. AT optimum molar concentration ratio of nanohybrid TiO2/ZnO is 1:4 (0.20M), the crystallite size, d, is 23.71 nm with peak of anatase found at diffraction angle of 48.05° and 62.50° while at 33.25° and 55.06° is rutile phase, respectively. We have found the distribution of nanohybrid TiO2/ZnO particles dispersed homogeneously since the particles were not bonded together with increasing ZnO molar concentration. From Ultra-Violet/Visible-near-infrared spectroscopy (UV-Vis-NiR), we have found the optical band-gap energy of nanohybrid TiO 2/ZnO was increased at 3.38 eV, while the transmittance percentage is 88.67%. This studied was successfully improved the optical band-gap energy of TiO2 and the results suggests for improvement of optical band-gap energy TiO2.