New compound ScTiNbO_6 synthesized via phase transformation from anatase to srilankite-like structure

摘要

A new srilankite-like compound ScTiNbO_6 was synthesized as a single phase at 900 ℃ via phase transformation using anatase-type nanopartides that were directly formed from solution mixture of Sc (NO_3)_3, TiOSO_4, and NbCl_5 under mild and weakly basic hydrothermal condition at 180 ℃ for 5 h. Anatase-type Sc_(0.5)Ti_2Nb_(0.5)O_6 nanopartides transformed into rutile phase at 1000 ℃ The new phase that was appeared via phase transformation was identified as srilankite-like structure with a trace of symptomatic wolframite, α-PbO_2 related structure. The optical band gap of ScTiNbO_6 was 3.58 eV. This titania-base material has potential for application as catalyst and photoluminescence, etc.