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Nb-doped TiO_2 nanoparticles were prepared by hydrothermal treatment of titanate nanotubes in niobium oxalate aqueous solution.The effect of Nb doping and rutile content on the photoelectrochemical performance based on TiO_2 powder electrodes was investigated.The results show that Nb-doped TiO_2 with a small amount of rutile exhibits the enhanced photoelectric conversion efficiency for dye-sensitized solar cell.The highest photoelectric conversion efficiency of 8.53%is obtained for 1%Nb—TiO_2 containing a small amount of rutile.When a small amount of rutile contained in 2%Nb—TiO_2,a higher photoelectric conversion efficiency of8.77%is achieved.
Nb-doped TiO 2 nanoparticles were prepared by hydrothermal treatment of titanate nanotubes in niobium oxalate aqueous solution. The effect of Nb doping and rutile content on the photoelectrochemical performance based on TiO 2 powder electrodes was investigated. The results show that Nb-doped TiO 2 with a small amount of rutile exhibits the enhanced photoelectric conversion efficiency for dye-sensitized solar cell. The highest photoelectric conversion efficiency of 8.53% is obtained for 1% Nb-TiO 2 containing a small amount of rutile.When a small amount of rutile contained in 2% Nb -TiO_2, a higher photoelectric conversion efficiency of 8.77% is achieved.