Large-scale fabrication of H2(H2O)Nb2O6 and Nb2O5 hollow microspheres
Liu, Meinan & Xue, Dongfeng (2010) Large-scale fabrication of H2(H2O)Nb2O6 and Nb2O5 hollow microspheres. Materials Research Bulletin, 45(3), p. 333.
Hollow micro-sized H2(H2O)Nb2O6 spheres constructed by nanocrystallites have been successfully synthesized via a bubble-template assisted hydrothermal process. In the reaction process, H2O2 acts as a bubble generator and plays a key role in the formation of the hollow structure. An in situ bubble-template mechanism has been proposed for the possible formation of the hollow structure. The spherelike assemblies of these H2(H2O)Nb2O6 nanoparticles have been transformed into their corresponding pseudohexagonal phase Nb2O5 through a moderate annealing dehydration process without destroying the hierarchical structure. Optical properties of the as-prepared hollow spheres were investigated. It is exciting that the absorption edge of the hollow Nb2O5 microspheres shifts about 18 nm to the violet compared with bulk powders in the UV/vis spectra, indicating its superior optical properties.
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|Item Type:||Journal Article|
|Keywords:||Oxides, Chemical Synthesis, Microstructure, Optical Properties|
|Subjects:||Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > MACROMOLECULAR AND MATERIALS CHEMISTRY (030300) > Synthesis of Materials (030306)|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering|
Past > Schools > School of Engineering Systems
|Copyright Owner:||Copyright 2009 Elsevier Ltd All rights reserved.|
|Deposited On:||15 Mar 2011 13:38|
|Last Modified:||01 Mar 2012 00:31|
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