Structural and Optical Properties of ZnO-TiO2 Nanocomposite Synthesized with Various Molar Ratios by Hydrothermal Technique

• Published in: Materials Science Forum
• Main Author: Nor A.M.; Malek M.F.; Mohamed R.; Mahmood M.R.
• Format: Conference paper
• Language: English
• Published: Trans Tech Publications Ltd 2022
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127166548&doi=10.4028%2fp-37v3am&partnerID=40&md5=632b3b04bdd71366c620c9afafd28e3c

Zinc oxide-titanium dioxide (ZnO-TiO2) have been successfully synthesized by hydrothermal method. ZnO-TiO2 nanocomposite were prepared at different molar ratio 100:0, 100:0, 30:70, 50:50 and 70:30. The objective of this research is to determine the effect of molar ratios on the structural and optical properties of ZnO-TiO2 nanocomposite. The samples were analyzed using X-ray diffraction (XRD) analysis, Field-emission scanning electron microscopy (FESEM) and UV-Vis spectroscopy. Based on the XRD results, it is revealed that ZnO-TiO2 nanocomposite consists of hexagonal wurtzite structure of ZnO and mixed of anatase/ rutile phase of TiO2. FESEM images showed ZnO in rod-like structure while TiO2 is formed in nanoparticle. ZnO-TiO2 composite is formed combination of rod-like and nanoparticles. UV-Vis spectra showed that all samples exhibited good absorption towards UV region. The calculated energy band gaps of ZnO-TiO2 composite are 2.92 eV which is slightly smaller compared to bulk ZnO and TiO2. The tuning energy band gaps of ZnO-TiO2 composite samples is a good indicator for use in catalytic activities. © 2022 Trans Tech Publications Ltd, Switzerland.