来源：ACS PublicationsUp to date, the development of highly efficient, visible light-active catalysts remains a formidable challenge due to the enhanced rising of atmospheric CO2 concentration. This study discusses a class of ceria-based high-entropy oxides designed to optimize charge carrier dynamics, surface reactivity, and CO2 activation efficiency. Due to the advantages of high configurational entropy and multi-element synergy, these materials achieved improved photocatalytic performance, surpassing conventional ceria-based systems. Structural and spectroscopic analyses reveal that Pr3+/Pr4+ ...
Release time:
2026
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来源：ACS PublicationsAmong rare-earth ions, Dy3+ uniquely enables intrinsic white-light emission and is therefore considered a promising activator for solid-state lighting. However, its parity-forbidden 4f–4f transitions lead to intrinsically weak absorption and limited emission intensity. Ce3+ was identified as an efficient sensitizer in the host LiSrY2(BO3)3 (LSYB) to enhance Dy3+ emission through energy transfer. A series of Ce3+-singly doped, Dy3+-singly doped, and Ce3+/Dy3+ codoped phosphors were successfully synthesized via a high-temperature solid-state reaction. Under 347 nm excitation, ...
Release time:
2026
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来源：ACS PublicationsThe heteroanionic rare-earth germanide oxide Sm26.25Ge22.75O5 was obtained by arc melting. The crystal structure determined by single-crystal X-ray diffraction (space group P4/nmm, a = 14.9838(2), c = 10.5353(1) Å) features [Sm6O] octahedra and capped [Sm8Ge] prisms that are condensed to Sm30Ge4O5 superclusters. These clusters form an interpenetrating framework with polyanionic Ge chains. Chemical bonding analysis reveals the substantial role of oxygen in stabilizing the structure: in the hypothetical oxygen-free compound, significant electron localization appears at th...
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2026
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来源：ACS PublicationsUnderstanding and modeling energy transfer mechanisms in rare-earth-doped nanomaterials are essential for advancing luminescent technologies used in bioimaging, optical thermometry, and solid-state lasers. In this work, we investigate the photoluminescence dynamics of Yb3+ and Er3+ ions in Y2O3 nanoparticles over a wide concentration range (0.5–17%), using both direct and up-conversion excitation. Luminescence decays of green, red, and near-infrared transitions were measured and analyzed using a single rate equation model incorporating radiative and non-radiative processes, ...
Release time:
2026
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