Synthesis of red-luminescent Eu3+-doped lanthanides compounds hollow spheres

In situ carbon template-based strategy to fabricate ferrite hollow spheres and their magnetic property

“…The exterior of the carbon spheres is hydrophilic and possesses abundant surface functional groups such as -OH and -C¼O. A lot of uniform hollow spheres have been successfully prepared using this excellent sacrificial template with no need of surface modification, differing from the classic silica and polystyrene colloidal spheres [36][37][38][39][40]. Moreover, this procedure has been demonstrated as an effective strategy for the in situ encapsulation of various nanoparticles, in situ synthesis of noble metal-carbon or oxide-carbon core-shell nanostructures and in situ template-based fabrication of series of oxide hollow spheres [41][42][43][44][45].…”

Synthesis and Characterization of CoFe2O4 Hollow Spheres

“…Thus, there are more reports on the preparation of hollow spheres by the hard template method, in which carbon spheres are often used as a template to fabricate hollow spheres as a result of the rich functional groups on the surface. A large number of hollow spheres have been prepared by using carbon spheres as a template, mainly including oxides [15] and metal, [16] and the hydrothermal carbonization route has also been applied in the synthesis of metal/carbon nanocables and metal nanoparticles/carbon nanofiber composites. [17][18][19] However, there are few reports on hollow spheres composed of ternary metal oxides, because it is difficult to form a uniform coating of ternary oxides on the surface of the template.…”

Template-free synthesis and luminescent properties of hollow Ln:YOF (Ln = Eu or Er + Yb) microspheres

“…Less attention has been paid to Ln oxyfluorides (LnOF), which have been suggested as excellent hosts since they combine the main advantages of oxides with those of fluorides [20]. In fact, to best of our knowledge, only a single report on the synthesis of Eu:YOF hollow spheres can be found, which resulted in a rather heterogeneous system consisting of aggregated hollow structures along with some other irregular particles [21].…”