Hydrothermal Synthesis of Ce-Doped CdS Nanomaterials for Visible-Light Photocatalytic Applications in Energy and Environmental Systems

Document Type : Research Article

Authors

Department of Chemistry, Sayyed Jamaleddin Asadabadi University, Asadabad, Iran

10.22091/jaem.2026.15160.1038

Abstract

CexCd1–xS (0 ≤ x ≤ 0.08) nanoparticles with varying cerium doping levels were successfully synthesized via a hydrothermal method. The structural, morphological, compositional, and optical properties of the prepared samples were systematically characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), and UV–Vis diffuse reflectance spectroscopy (DRS). The photocatalytic activity of pure and Ce-doped CdS nanoparticles was evaluated through the visible-light-driven decolorization of Reactive Blue 19 in aqueous solution. Among the investigated compositions, the sample containing 6% Ce exhibited the highest photocatalytic efficiency compared to other dopant concentrations. The effects of key operational parameters—including cerium content, catalyst dosage, initial dye concentration, and the presence of radical scavengers—were systematically examined. The addition of radical scavengers such as iodide, carbonate, sulfite, and 1,4-benzoquinone significantly suppressed the decolorization efficiency, indicating the crucial role of reactive species in the degradation process. Overall, the results demonstrate that Ce-doped CdS nanoparticles, particularly at an optimal doping level of 6%, exhibit enhanced visible-light photocatalytic performance and promising reusability, highlighting their potential application in the removal of organic pollutants from wastewater.

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