Controllable synthesis of bifunctional material Ca2Ti2O6:Eu3+ and its comparative study on luminescence and photocatalytic properties with CaTiO3:Eu3+

Wang, Yulu; Qian, Benfu; Zhao, Qianran; Duan, Tianzheng; Xie, Funa; Zou, Haifeng; Song, Yanhua; Zhou, Xiuqing; Ye, Sheng

doi:10.1016/j.ceramint.2022.02.272

Cited by 9 publications

(2 citation statements)

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“… 47 Besides, the 5 D 0 → 7 F 1 , 7 F 2 , and 7 F 4 transitions all split into different peaks due to the energy level splitting originated from different Eu 3+ -site occupations. 27 , 47 In contrast to Eu 2 O 3 , the doped nanoparticles exhibited a distinct decrease of the peak intensities, and those for both EF3.0 and EF5.0 demonstrated to be even lower than that of EF1.0, indicating that photogenerated carrier recombination in EF3.0 and EF5.0 was relatively less and Fe doping significantly inhibited the recombination process. One possible scenario could be due to the oxygen vacancies introduced by the doping of Fe 3+ cations, which act as trapping centers for photogenerated electrons, increasing the lifetime of photogenerated carriers.…”

Section: Resultsmentioning

confidence: 99%

“…It is observed that peaks corresponding to the electric dipole transition ( 5 D 0 → 7 F 2 ) are much stronger than those for other transitions, indicating that the Eu 3+ hosts occupied low-symmetry sites without inversion centers . Besides, the 5 D 0 → 7 F 1 , 7 F 2 , and 7 F 4 transitions all split into different peaks due to the energy level splitting originated from different Eu 3+ -site occupations. , In contrast to Eu 2 O 3 , the doped nanoparticles exhibited a distinct decrease of the peak intensities, and those for both EF3.0 and EF5.0 demonstrated to be even lower than that of EF1.0, indicating that photogenerated carrier recombination in EF3.0 and EF5.0 was relatively less and Fe doping significantly inhibited the recombination process. One possible scenario could be due to the oxygen vacancies introduced by the doping of Fe 3+ cations, which act as trapping centers for photogenerated electrons, increasing the lifetime of photogenerated carriers.…”

Section: Resultsmentioning

confidence: 99%

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Enhanced Photocatalytic Degradation of Rhodamine B Dye by Iron-Doped Europium Oxide Nanoparticles

Zhao,

Jing,

Dai

et al. 2024

ACS Omega

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As a wide-bandgap rare-earth oxide, Eu2O3 was often utilized as an auxiliary material of other photocatalysts because its photocatalytic performance was limited by the luminescence characteristics of Eu3+ and low light utilization. In this study, we improved the photocatalytic degradation performance of the Eu2O3 nanoparticles by doping with Fe cations. The Eu2O3 nanoparticles with different Fe-doping concentrations (1, 3, and 5%, noted as EF1.0, EF3.0, and EF5.0, respectively) were synthesized via chemical precipitation and calcination methods. It was found that doping could reduce Eu2O3’s bandgap, which probably originated from the introduction of oxygen vacancies with lower energy levels than the conduction band of Eu2O3. Compared with the undoped Eu2O3 nanoparticles with a removal efficiency of 22% for degrading rhodamine B dye within 60 min, the photocatalytic degradation efficiencies of EF1.0, EF3.0, and EF5.0 were demonstrated to be improved to 42, 48, and 33%, respectively, and EF3.0’s performance was the best. The enhanced photocatalytic performance of the doped samples was related to the oxygen vacancies acting as capture centers for electrons, such that the photogenerated electron–hole pairs were efficiently separated and the redox reactions on the surface of the nanoparticles were enhanced accordingly. Additionally, the enhanced light absorption and broadened spectral band further improved EF3.0’s degradation efficiency.

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Section: Resultsmentioning

confidence: 99%