Corn-like, recoverable γ-Fe(2)O(3)@SiO(2)@TiO(2) photocatalyst induced by magnetic dipole interactions

Corn-like, γ-Fe(2)O(3)@SiO(2)@TiO(2) core/shell heterostructures were synthesized by a modified solvothermal reduction combined with a sol-gel method. SiO(2) shells were first deposited on monodisperse Fe(3)O(4) microspheres by a sol-gel method. Fe(3)O(4)@SiO(2)@TiO(2) corn-like heterostructures wer...

Descripción completa

Detalles Bibliográficos
Autores principales: Wang, Fang, Li, Manhong, Yu, Lifang, Sun, Fan, Wang, Zhuliang, Zhang, Lifang, Zeng, Hao, Xu, Xiaohong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5537353/
https://www.ncbi.nlm.nih.gov/pubmed/28761085
http://dx.doi.org/10.1038/s41598-017-07417-z
Descripción
Sumario:Corn-like, γ-Fe(2)O(3)@SiO(2)@TiO(2) core/shell heterostructures were synthesized by a modified solvothermal reduction combined with a sol-gel method. SiO(2) shells were first deposited on monodisperse Fe(3)O(4) microspheres by a sol-gel method. Fe(3)O(4)@SiO(2)@TiO(2) corn-like heterostructures were then obtained by sequential TiO(2) coating, during which the magnetic dipolar interactions induced the anisotropic self-assembly process. After annealing at 350 °C, the crystalized TiO(2) enhanced photocatalytic activity, while Fe(3)O(4) was converted to γ-Fe(2)O(3). The corn-like γ-Fe(2)O(3)@SiO(2)@TiO(2) photocatalyst can be recycled and reused by magnet extraction. Despite the photocatalytic activity decreased with each cycle, it can be completely recovered by moderate heating at 200 °C.

Ejemplares similares