Effects of Calcination Temperature on Properties of Boron Doped TiO2 Photocatalyst Prepared Using Solvothermal Method

Abstract

Boron doped TiO₂ based photocatalysts were prepared by solvothermal method at different calcination temperatures. Anatase TiO₂ crystallite sizes of the samples that are calcinated at 300, 400, 500 and 600 ºC are 10.6, 13.3, 19.0 and 28.4 nm, respectively. All the surfaces are rough with small holes and particles distributing on the large particles. The cell volumes of the samples become larger and specific surface areas of the samples decline at higher calcination temperature due to accelerated crystal growth at high temperature. High temperature treatment leads to enlarged average pore size and shrinking pore volume. The sample prepared at 400 ºC shows the optimal photocatalytic degradation activity. Adsorption capacity declines constantly along with increasing calcination temperature.