UNSPECIFIED (2011) Size-controllable synthesis of functional heterostructured TiO2âWO3 coreâshell nanoparticles. Journal of Nanoparticle Research, 13 (11). pp. 5909-5917.
Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.
Mono and bicomponent TiO2 and WO3 nanoparticles were synthesized inside VycorÂ® glass pores, by cycles of impregnation of the glass with the respective oxide precursor followed by its thermal decomposition. The impregnation-decomposition cycle (IDC) methodology promoted a linear mass increase of the glass matrix, and allowed tuning the nanoparticle size. X-ray diffraction and Raman spectroscopy data allowed identifying the formation of TiO2 as anatase phase, while WO3 is a mixture of the Î³-WO3 (monoclinic) and Î´-WO3 (triclinic) phases. High resolution transmission electron microscopy images revealed that for 3, 5, and 7 IDC, the TiO2 nanoparticles obtained presented average diameters of 3.4, 4.3, and 5.1Â nm, and the WO3 nanoparticles have 2.9, 4.6, and 5.7Â nm sizes. These TiO2 and WO3 monocomponent nanoparticles were submitted to IDC with the other oxide precursor, resulting in bicomponent nanoparticles. The broadening and shift of the Raman bands related to titanium and tungsten oxides suggest the formation of hetero-structure coreâshell nanoparticles with tunable core sizes and shell thicknesses.
|Deposited By:||Prof. Alexey Ivanov|
|Deposited On:||05 Jan 2012 09:30|
|Last Modified:||05 Jan 2012 09:42|
Repository Staff Only: item control page