Photocatalytic Processes for the Removal of Dye - Green Chemistry for Dyes Removal from Wastewater - page 130

Figure 4.4 Thin Film Fixed Bed Reactor (Copyright 2004 Elsevier) [29].
Figure 4.5 Double Skin Sheet Reactor (Copyright 2004 Elsevier) [29].
orange G, naphthol blue black) have been carried out in natural sunlight
using TiO 2 , ZnO and a few other photocatalysts such as CdS, ZrO 2 , WO3,
etc. [5]. The TiO 2 -based photocatalytic oxidation process became popular
mainly because of the following reasons: i) the processes can be carried
out under ambient temperature and pressure conditions, ii) the oxidant is