Photocatalytic Activity in CH_𝟑CN Related to the Surface Properties of TiO_𝟐 Powders Prepared by Sol-Gel Method

Table 1

Aldehyde conversion and photocatalytic activity (k_a) data obtained in the photo-oxidation with TiO₂ powders.

Sample	Aldehyde yield (%)					10^3ka (min^−1)
	𝑡=15 minutes	𝑡=30 minutes	𝑡=60 minutes	𝑡=120 minutes	𝑡=180 minutes
S100	12	22	35	52	67	6.3
S200	11	22	40	65	81	9.0
S300	20	33	52	77	80	10.2
S350	18	28	43	69	81	9.4
S400	15	26	36	59	69	6.9
S500	14	23	37	57	74	7.4
S700	11	16	27	44	59	4.9
S850	12	17	26	35	57	4.0
S1000	—	1	2	2	6	0.3
P25	14	20	24	33	38	3.1