Nickel-doped cerium dioxide nanoparticles exhibit room temperature ferromagnetism due to high oxygen mobility within the doped CeO2 lattice. CeO2 is an excellent doping matrix as it can lose oxygen whilst retaining its structure. This leads to increased oxygen mobility within the fluorite CeO2 lattice, leading to the formation of Ce3+ and Ce4+ species and hence doped ceria shows a high propensi...

Sr2SiS4:Ce3+ is an efficient blue-emitting (460 nm) phosphor, excitable with light of wavelengths up to 420 nm. From the excitation spectrum, we construct the energy level scheme and use it to check the predictive power of the Dorenbos model, relating the positions of the Ce3+ energy levels with those of Eu2+ in the same host. For strontium thiosilicate, this method gives excellent results and ...

The role of surface and subsurface O vacancies for gold adsorption on crystalline CeO2(111) films has been investigated by scanning tunneling microscopy and density functional theory. Whereas surface vacancies serve as deep traps for the Au atoms, subsurface defects promote the formation of characteristic Au pairs with a mean atom distance of two ceria lattice constants (7.6 Å). Hybrid density ...

In this paper, Ce-doped La1-xCexMnO3 perovskite catalysts are prepared by the sol–gel method, and promotion effect of Ce doping on LaMnO3 for CO oxidation is investigated. The characterized X-ray diffractograms, Raman, N2 physisorption isotherms, temperature-programed reduction with H2, transmission electron microscopy, photoelectron spectroscopy. results show that greatly improves catalytic ac...

In this work, YBO3 phosphors doped with Ln3+ (Ce3+, Tb3+, Eu3+) ions were synthesized by a facile hydrothermal method using high temperature and pressure environment. Structural property characterizations show all the samples have similar spherical morphology hexagonal crystal structure good crystallinity. PL spectra CIE calculation that color of can be easily controlled species atomic content ...

Y3(Al,Ga)5O12 (YAGG) materials doped with Ce3+, Cr3+ and Pr3+ were synthesized by using a modified Pechini method subsequently annealed in air at selected temperatures between 900 1500 °C. According to X-ray powder diffraction (XRPD) transmission electron microscopy (TEM) analyses, the particles size distributions become large broad, respectively, due sintering agglomeration high annealing temp...

The luminescence efficiency of Ce3+ in garnet phosphors is among the most stable for luminescent materials. Still, it has been observed to be reduced at high incident blue flux (known as droop) due nonlinear processes caused by lumen density inside Herein, shown that case Ce3+-doped concentrator rods, droop can explained excited-state absorption (ESA) mainly green light trapped rods. ESA spectr...