Table 2.

List of the samples used together with the initial photoreaction rates, and the conversion (%) 4-NP after 180 min of irradiation time.

Samples a	r0 × 109	r0′ × 109	4-NP
	(mol.L−1.s−1)	(mol.L−1.s−1.m−2)	(%) b converted at 180 min
TiO2	26.59	33.24	93.5
1.0 µmol CuPp(4b)/TiO2	36.36	45.45	95.9
2.0 µmol CuPp(4b)/TiO2	39.62	49.52	97.5
4.0 µmol CuPp(4b)/TiO2	42.48	53.10	97.4
6.0 µmol CuPp(4b)/TiO2	46.70	58.38	98.2
9.0 µmol CuPp(4b)/TiO2	31.21	39.01	97.1
6.0 µmol ZnPp(4a)/TiO2	33.94	42.42	95.1
6.0 µmol CoPp(4c)/TiO2	34.28	42.85	95.4
6.0 µmol FeClPp(4d)/TiO2	18.77	23.46	92.8
6.0 µmol H2Pp(4)/TiO2	22.20	27.75	86.0
4.0 µmol CuPp(3b)/TiO2	34.34	42.92	95.8
6.0 µmol CuPp(3b)/TiO2	42.03	52.54	97.9
6.6 µmol CuPp(3b)/TiO2	41.52	51.90	96.7
6.0 µmol ZnPp(3a)/TiO2	33.55	41.94	94.7
6.0 µmol CoPp(3c)/TiO2	33.72	42.15	93.9
6.0 µmol FeClPp(3d)/TiO2	18.66	23.32	93.3
6.0 µmol H2Pp(3)/TiO2	21.36	26.70	85.5

^a The numbers before the code used for identifying the samples indicate the mg amounts of sensitizer [H₂Pp(a), H₂Pp(a), CuPp(a) or CuPp(a)] per gram of TiO₂; r₀: The initial photoreaction rates per used mass; r₀′: Initial photoreaction rates per used mass and per unit surface area of the catalysts. The BET specific surface areas of all the samples are equal to ca. 8 m^2.g⁻¹, amount of photocatalyst: 0.1 g/125 mL solution; ^b The % conversion of 4-NP was calculated by the following formula C/C₀ × 100.