Scientific Reports 5: Article number: 9561; published online: 31 March 2015; updated: 14 May 2018

This Article contains an error. The Authors stated that the cell volume and lattice parameters were derived using Scherrer’s formula. These parameters were actually calculated using Bragg’s law.

In the Results section,

“The cell volume and lattice parameters can be derived from the diffraction peaks corresponding to crystal planes (101) and (200) in the XRD patterns using Scherrer’s formula, for which of Ni-TiO2 are larger than those of pure TiO2 (Table 1).”

should read:

“The cell volume and lattice parameters can be derived from the diffraction peaks corresponding to crystal planes (101) and (200) in the XRD patterns using Bragg’s law, for which of Ni-TiO2 are larger than those of pure TiO2 (Table 1).”

This change does not affect the conclusions of the article. The authors apologize for the error.