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TiO2 anatase nanocrystals were surface modified by deposition of V(V) species. The starting amorphous TiO2 nanoparticles were prepared by hydrolytic processing of TiCl4-derived solutions. A V-containing solution, prepared from methanolysis of VCl4, was added to the TiO2 suspension before a solvothermal crystallization step in oleic acid. The resulting materials were characterized by X-ray diffraction, transmission electron microscopy (TEM), Fourier transform infrared, Raman, and magic angle spinning solid-state 51V nuclear magnetic resonance spectroscopy (MAS NMR). It was shown that in the as-prepared nanocrystals V was deposited onto the surface, forming Ti–O–V bonds. After heat treatment at 400 °C, TEM/electron energy loss spectroscopy and MAS NMR showed that V was partially inserted in the anatase lattice, while the surface was covered with a denser V–O–V network. After heating at 500 °C, V2 …
American Chemical Society
Publication date: 
26 Sep 2013

Mauro Epifani, Raül Díaz, Carmen Force, Elisabetta Comini, Teresa Andreu, Reza R Zamani, Jordi Arbiol, Pietro Siciliano, Guido Faglia, Joan R Morante

Biblio References: 
Volume: 117 Issue: 40 Pages: 20697-20705
The Journal of Physical Chemistry C