Deconvolution of the EPR spectra of vanadium oxide nanotubes

► Characterization of continuous wave EPR spectra of vanadium oxide nanotubes. ► A deconvolution approach based on the Krylov basis diagonalization method (KBDM). ► The method is suitable for fast and routine spectral analysis. ► Results confirm the coexistence of two isolated V4+ species in the nanotubes.