1. Mn-Modified CdO Nanorods: Physical, Optical, Electrical, and Photocatalytic Investigations
- Author
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Abdallah, Alaa, Aridi, Amani, Halabi, Rana, Noun, Manale, and Awad, Ramadan
- Abstract
The presence of dyes in water is a significant contributor to water pollution, posing threats to both aquatic ecosystems and human health. To address this issue, metal oxide nanomaterials, particularly CdO, have gained attention for their efficacy in wastewater treatment through efficient photodegradation of dyes. In this study, CdO and Cd0.995Mn0.005O (CdMnO) nanorods were synthesized using the co-precipitation method. Structural characterization through powder X-ray diffraction (PXRD), transmission electron microscope (TEM), and Raman analysis confirmed the purity of the synthesized nanorods. Mn doping induced slight variations in the lattice parameter and reduced the crystallite size. The two-dimensional nanowires to nanorods morphology of CdO and CdMnO samples were revealed by TEM, with an average diameter of 17.10 and 15.99 nm, respectively. Optical analysis demonstrated a significant reduction in the bandgap energy of CdO upon Mn doping. Moreover, the photoluminescence (PL) analysis indicated that Mn2+dopant ions reduced the recombination rate of photogenerated electron-hole pairs, Cd interstitials, and oxygen vacancies. CdMnO exhibited higher conductivity and lower activation energy compared to pure CdO. Additionally, 90.3% and 97.8% of Congo red dye were degraded after 60 min of UV irradiation duration in the presence of CdO and CdMnO photocatalysts, respectively. The enhanced photocatalytic activity was attributed to the slow recombination rate of CdMnO, as indicated by PL analysis.
- Published
- 2024
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