Investigation on Parameters Affecting the Effectiveness of Photocatalytic Functional Coatings to Degrade NO: TiO₂ Amount on Surface, Illumination, and Substrate Roughness

Table 1

Illumination conditions tested.

	Reactor-tube distance	UV-A region (315–400 nm)	VIS region (400–800 nm)
OSRAM Lumilux Cool White T8	45 cm	0.035 W/m^2	2.4 W/m^2
NARVA Blacklight Blue T8	45 cm	1.0 W/m^2	Negligible
	15 cm	3.3 W/m^2	Negligible