Environmentally and Ecofriendly of Photocatalytic Activity of CdS/ZnO Nanocomposite Synthesized via Hydrothermal Method for Methylene Blue Degradation by Using UVA Light
نویسندگان
1 Department of Dentistry, Dijlah University College, Baghdad, Iraq
2 Ahl Al bayt University, College of Pharmacy, Kerbala, Iraq
3 Department of Sciecnes, Al-Manara College for Medical Sciences, Maysan, Iraq
4 Department of Medical Laboratories Technology, AL-Nisour University College Baghdad, Iraq
5 Department of Clinical Laboratory Sciences, University of Alkafeel, Iraq
6 College of Medicine, University of Al-Ameed, Kerbala, Iraq
7 Mazaya University College, Iraq
doi
10.22052/JNS.2025.02.013چکیده
This study investigates the photocatalytic efficiency of a CdS/ZnO nanocomposite for the decolorization of the cationic dye Methylene Blue (MB). The physicochemical characteristics of the synthesized nanocomposite were systematically characterized using X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray Spectroscopy (EDX), and Transmission Electron Microscopy (TEM). The photocatalytic performance of the CdS/ZnO nanocomposite, functioning as a semiconductor catalyst, was evaluated for the degradation of MB in aqueous solution under UV light irradiation within a slurry photo-reactor system. A comprehensive assessment of operational parameters, including catalyst dosage and initial dye concentration, was conducted to determine their influence on the decolorization kinetics. The results revealed that the photocatalytic decolorization of MB followed a two-stage kinetic process, exhibiting an initial rapid decolorization phase followed by a slower reaction phase. Enhanced decolorization efficiency was observed with decreasing initial MB concentration and increasing UV light intensity. The optimal catalyst loading was identified as approximately 20 mg·L⁻¹, while the most favorable pH for the reaction was around 6.8, aligning with the natural pH of the MB solution.
