Preparation of Fluorine-Doped TiO₂ Photocatalysts with Controlled Crystalline Structure

Table 2

BET surface area and porosity of TiO₂ powders calcinated at different temperatures.

Nominal name	Calcination temperatures
	400^°C		500^°C		600^°C
	BETSSA (m^2/g)	Porosity (%)	BETSSA (m^2/g)	Porosity (%)	BETSSA (m^2/g)	Porosity (%)
TF0	156.06	55.34	92.19	47.77	31.67	32.34
F/Ti = 0
TF10	48.48	32.15	32.89	22.41	18.79	10.23
F/Ti = 10/90
TF20	14.13	22.57	20.91	13.06	30.29	7.32
F/Ti = 20/80