Raman spectra of ZnO-V2O5 nanoparticles with and without thermal treatment. Samples 1 h.Cal and 1 h.Et.Cal exhibit a strong paramagnetic component attributed to the formation of secondary phases containing V+3 ions. The peaks in the intervals 200 to 360 and 780 to 1,000 cm−1 are attributed to ZnV2O4 phase. The weak and broad peaks for sample 1 h centered at 420 and 900 cm−1 are attributed to amorphous material linked to V+3 ions.
Olive-Méndez et al. Nanoscale Research Letters 2014 9:169 doi:10.1186/1556-276X-9-169