Hydrothermal Synthesis of Fe/N Co-Doped Titanium Dioxide and its Sterilization Activity via E. Coli under Visible Light Irradiation
Using TiOSO4 as precursor, Fe(NO3)3⋅9H2O as the source of Fe, CN3H5⋅HCl as the source of N, Fe/N co-doped TiO2 powder has been prepared by hydrothermal method. The as-prepared powders were characterized by XRD, BET, TEM and UV-Vis spectrophotometer. The nanocrystalline Fe/N Co-doped TiO2 powders are composed of anatase and show light-yellow in color. The grain size is about 11.1nm and the specific surface area is 145m2/g. XPS results show that N atoms and Fe atoms were incorporated into the lattice of TiO2 and the concentration of N and Fe doped in TiO2 was 0.8at% and 2.2at%, respectively. The UV-Vis diffuse reflection spectra indicate that the absorption edges of the co-doped TiO2 powders has well red-shifted into visible light region up to 606nm. The Fe/N co-doped TiO2 exhibits excellent photocatalytic activity by sterilizing E. coli completely within 1 hour under visible light irradiation.
Wei Pan and Jianghong Gong
Y. Wei et al., "Hydrothermal Synthesis of Fe/N Co-Doped Titanium Dioxide and its Sterilization Activity via E. Coli under Visible Light Irradiation", Key Engineering Materials, Vols. 368-372, pp. 1489-1492, 2008