Photocatalytic Degradation of NO_𝑥 Using Ni-Containing TiO₂

Table 1

The apparent quantum yields and selectivities of NO₂ of various catalysts: catalyst loading: 0.2 g, intensity of irradiation: 1 mW/cm², inlet concentration of NO, 1 ppm, inlet flow rate, 1 L/min, relative humidity: 55%, reaction temperature, 26°C.

Catalyst	P25	0.05% Ni	0.1% Ni	0.2% Ni	0.5% Ni	1% Ni	4% Ni
Φ (%)	2.13	2.63	2.85	2.58	2.07	1.80	1.30
Sel.NO2 (%)	62.8	30.7	24.4	29.5	36.9	48.5	56.0