During the experiment, it is found that the calcination of TiO2 (P25) at 500 degree centigrade without decreasing the BET surface area. Is it meaning for publish the phenomenon?
It would be reasonable to think about the pre-history of your sample before and after thermal treatment. Is there any phenomenon in the absence of changes? Is any desorption process pass during thermal treatment?
In the experiment, we performed doping of P25 (commercial TiO2) whose BET area is around 50 m2/g. After doping by calcination at 500 degree for 2 h, BET tests were performed to P25 and the doped samples. The BET surface areas of all samples around 50 m2/g. However, calcination of P25 at 500 degree for 2 h without doping, the BET surface are decreases to 40 m2/g. We do not understand what happens?