Relationship between Synthesis Conditions and Photocatalytic Activity of Nanocrystalline TiO₂

Table 2

Physicochemical properties of the TiO₂ nanoparticles synthesized with different molar ratios of water and TTIP. The TiO₂ synthesis was carried out at pH 7 and at a calcination temperature of 600^°C.

Molar ratio (—)	Phase content^a	𝑆bBET (m^2 g^−1)	Pore volume^b (mm^3 g^−1)	Crystalline size^c (nm)
2	(A): 100	29.6	38	18.2
5	(A): 100	38.2	69	18.0
10	(A): 100	44.0	58	19.2
20	(A): 100	51.0	92	18.5
50	(A): 82.5	63.9	110	(A): 18.5
	(R): 17.5			(R): 19.3

^aA and R represent anatase and rutile, respectively.
^bValue calculated from nitrogen adsorption isotherm.
^cValue calculated using the Scherrer’s equation [22].