Tuning the luminescence performance of CdO nanoparticles via Tb₂O₃ inclusion

Abstract

The strategy of this work is mainly concentrated on tuning the performance of CdO nanoparticles (NPs) via Tb2O3 addition. Precipitation method is utilized for the NPs synthesis, where Tb2O3 concentrations were 0%, 5%, 10% and 15%. The prepared samples are examined using different analytical techniques. SEM and TEM results showed that Tb2O3 acted as passivation agent for the growth of CdO NPs and annulled particles agglomeration. There is a harmony in crystallites size calculated from XRD and TEM (47–55 nm), whereas, the maximum value is obtained for 5% of Tb2O3. The molecular analysis using FTIR elucidated the stability of the absorption bands for the mixed phase samples comparing with the single one, in agreement with XRD results. The estimated Eg values are ranged within (2.90–2.94) ± 0.02 and are increased slightly with Tb2O3 content. The photoluminescence (PL) spectra using different excitation wavelengths showed two overlapped emission peaks for the mixed phase Tb2O3 - CdO NPs, where the positions and the shape of these peaks appeared to be independent on excitation wavelength. The maximum PL intensity is recorded for the 5% of Tb2O3 using an excitation wavelength of 365 nm. The high intensive of visible emission using different excitation wavelengths suggested the possibility of their use in diverse applications such as light emitting diodes, optical sensor as well as in cathode ray tubes.

Hydrothermal Synthesis of CuO/WO3 Hybrid Bifunctional Composites with Unprecedented Dark Adsorption and Photocatalysis

“…The adsorption methods are exceptional because they are easy to implement, inexpensive, and very successful at removing organic dyes. [2,12,[14][15][16][17][18][19][20] An approach that can be adjusted for improved efficiency, this method entails physically or chemically attaching dye molecules to the surface of a solid substance. Although there has been a lot of research on photocatalysis using semiconductor materials capabilities to convert solar energy into usable form for degrading pollutants, this study presents a new strategy by putting dark adsorption ahead of sunlightassisted photocatalysis.…”

“…Adsorption, photocatalysis, and biological approaches are among the many that have been investigated. The adsorption methods are exceptional because they are easy to implement, inexpensive, and very successful at removing organic dyes [2,12,14–20] . An approach that can be adjusted for improved efficiency, this method entails physically or chemically attaching dye molecules to the surface of a solid substance.…”

Development of VSe2@ Cu2Se nano-composites via facile one-pot hydrothermal method for pharmaceutical applications

“…These particles would have the qualities of both nanoparticles at the same time while preserving their distinct traits. There have been numerous reports of these composites performing admirably when combined with their distinct states (Abu-Dief et al 2020, Abu-Dief et al 2021, Awad, Abu-Dief 2022, Alahmadi et al 2023. Complementary applications of multiple pharmaceuticals are widespread in the medical sector, where two distinct drugs fail to provide the desired effect when used separately, but have significant benefits when used together (Hurwitz et al 2004).…”