| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1524140 | Materials Chemistry and Physics | 2012 | 6 Pages |
Novel hollow β-MnO2 polyhedral nanorods have been successfully synthesized by a simple hydrothermal process. The morphology and structure of the samples obtained at different reaction time have been characterized by XRD, TEM and SEM. The results indicate that β-MnO2 nanorods prepared at reaction time 12 h have hollow, polyhedral structure and uniform size with the length of about 2–3 μm. At longer reaction time, the shells of the hollow β-MnO2 polyhedral nanorods were broken. After analyzing the above results, it's obvious that the reaction time has a great effect on the structure and morphology of the products. The morphology evolution of MnO2 products demonstrates that the growth mechanism of hollow β-MnO2 polyhedral nanorods could be assigned to the cooperation of oriented attachment and Ostwald ripening mechanism.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Hollow polyhedra of β-MnO2 were hydrothermally synthesized. ► The formation process of hollow β-MnO2 polyhedra has been investigated. ► The growth mechanism of hollow β-MnO2 polyhedra was discussed for the first time. ► Hollow β-MnO2 polyhedra form by oriented attachment and Ostwald ripening mechanism.
