Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1609975 | Journal of Alloys and Compounds | 2015 | 8 Pages |
Abstract
Uniform yolk-shell Au@Y2O3:Eu3+ sub-microsphere phosphors were successfully prepared through urea-assisted homogeneous precipitation method by using carbon spheres as templates. The structure, morphology, photoluminescence and photocatalytic properties of the as-prepared Au@Y2O3:Eu3+ microspheres were subsequently investigated. The results indicate that the Y2O3:Eu3+ microspheres can be well indexed to the cubic Y2O3 phase. Furthermore, the Au@Y2O3:Eu3+ microsphere is able to maintain the spherical morphology and good dispersion of the carbon sphere template. The yolk-shell Au@Y2O3:Eu3+ spheres exhibit the bright luminescence of Eu3+. The photocatalysis of the Y2O3:Eu3+ shell and the Au core occur simultaneously, thereby significantly decreasing the absorbance of rhodamine B solutions. This work provides a strategy for inhibiting aggregation of noble metal nanoparticles during high-temperature calcinations and leaching of noble metal nanoparticles into a solution through a mesoporous shell. Ultimately, a multifunctional nanostructure was obtained by combining a specific metal core with an oxide shell.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Chao Li, Ling Xu, Yirong Zhao, Jiali Sun, Diping He, Huan Jiao,