Sodium doping in brookite TiO₂ enhances its photocatalytic activity.

ABSTRACT: We report in this work that sodium doping of brookite TiO₂ effectively enhances its photocatalytic activity, which becomes three times higher than that of the quasi-spherical brookite TiO₂. The results demonstrated that the sodium-doped brookite Na _x Ti_{1- x} O₂ can be stable up to 500 °C. At 600°C, the sodium in the brookite precipitates in the form of Na₂CO₃, and above 700 °C, the brookite Na _x Ti_{1- x} O₂ transforms into Na₂Ti₆O₁₃ by a twinning process with the orientation relationship of [1-2-3]_Matrix//[1-23]_Twins and (-2-10)_Matrix//(1-1-1)_Twins. The differ

SUBMITTER: Zhuang B 

PROVIDER: S-EPMC9273989 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature