Photocatalytic study of methyl orange dye in UV exposure by using ZnO nanoparticles. (2020)

• Record Type: Journal Article
• Authors: Sahoo, Rajashree; Khatua, Lizina; Das, Susanta Kumar
• Is Part Of: Materials today. Volume 33:Part 8(2020)
• Page Start: 5592
• Page End: 5594
• Publication Date: 2020
• Subjects: Laboratory grade powder -- Mechanical grinding -- X-ray diffraction -- Transmission electron microscope; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2020.03.575
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: The ZnO nanoparticles were prepared by mechanical grinding method of the laboratory grade powder. X-ray diffraction (XRD), Transmission electron microscope (TEM), Diffuse reflectance spectra (DRS) characterizations were done for the conformity of phase formation, particle size estimation and optical property study. XRD result shows ZnO nanoparticles are of hexagonal wurzite phase and TEM image shows the diameter and length of the nanoparticles are 59.34 nm and 300 nm respectively. DRS image shows the band edge absorption spectra is coming around 380 nm. The photocatalytic activity was investigated under the UV exposure using laboratory grade ZnO nanoparticles for the decomposition of Methyl Orange (MO) dye. The MO dye decomposition took 60 min for the complete decomposition of dye. The reaction rate and kinetics is also studied. The reaction rate constant is found to be 0.05 min −1 and also it follows pseudo-fast order reaction kinetics. These materials are low cost materials and showing excellent photocatalytic activity.