Photocatalytic degradation of malachite green dye under UV light irradiation using calcium-doped ceria nanoparticles
Journal: Asian Journal of Nanoscience and Materials (Vol.3, No. 1)Publication Date: 2020-winte
Authors : Ibrahim A. Amar; Hebatallah M. Harara; Qamrah A. Baqul; Mabroukah A. Abdul Qadir; Fatima A. Altohami; Mohammed M. Ahwidi; Ihssin A. Abdalsamed; Fatema A. Saleh;
Page : 1-14
Keywords : dye photodegradation; Nanostructured materials; doped ceria catalyst; Semiconductor; Optical properties;
Abstract
In this study, photocatalytic activity of Ca-doped ceria (CDC) for malachite green (MG) degradation was investigated. CDC was successfully synthesized via co-precipitation method using ammonium oxalate as a precipitating agent. CDC was characterized using Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (XRD), UV-Vis spectroscopy, and scanning electron microscopy (SEM). The band gap energy (Eg) of CDC was found to be 3.96 eV. In addition, the factors affecting the photodegradation of MG including; irradiation time, photocatalyst dosage, initial dye concentration, and solution temperature were studied. The results revealed that CDC could degrade approximately 93% of MG dye at the concentration of 6 mg/L, irradiation time of 90 min, photocatalyst dosage of 0.1 g, and solution temperature of 35 °C. The obtained results indicate that CDC is a promising material for the photocatalytic applications and can be used to eliminate very toxic dyes such as MG.
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