Photocatalytic niobium and tantallum doped monodispersed nanoparticles of titania for visible-ligt applications

0345884 - ÚACH 2011 RIV CZ eng C - Conference Paper (international conference)
Štengl, Václav - Houšková, Vendula - Bakardjieva, Snejana - Murafa, Nataliya
Photocatalytic niobium and tantallum doped monodispersed nanoparticles of titania for visible-ligt applications.
NANOCON 2009 Conference Proceedings. Ostrava: TANGER, 2009, s. 249-263. ISBN 978-80-87294-13-0.
[Nanocon 2009 / Conference with International Participation /1./. Rožnov pod Radhoštěm (CZ), 20.10.2009-22.10.2009]
Institutional research plan: CEZ:AV0Z40320502
Keywords : titania * peroxo-complexes * niobium
Subject RIV: CA - Inorganic Chemistry

Niobium or tantalum doped anatase were prepared by thermal hydrolysis of peroxotitanium complex aqueous solutions dissolving niobium or tantalum peroxo-comples at 100 degrees C for 3 days The synthesized samples were characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), High Resolution Transmission Electron Microscopy (HRTEM), surface area (BET) and porosity determination (BJH) The photocatalytic activity of doped titania samples was determined by decomposition of salicylic acid during irradiation at 365 nm and 400 nm Niobium-doping caused the increase of unit cell constants of anatase and the shape change of anatase crystallites from spindle-like to cubic-like structure. The niobium and tantalum doping increases the stability of anatase to above 1000 degrees C by inhibiting the growth of Mania crystallites.
Permanent Link: http://hdl.handle.net/11104/0187062