Influence of relative humidity on the photocatalytic oxidation (PCO) of toluene by TiO2 loaded on activated carbon fibers: PCO rate and intermediates accumulation

VOCs elimination and health risk reduction in e-waste dismantling workshop using integrated techniques of electrostatic precipitation with advanced oxidation technologies

“…An increase of benzaldehyde concentration is also observed at the PC unit's outlet (Fig. S12), which may be due to extra benzaldehyde being generated as an intermediate from large molecular weight AHs during PC treatment [14,40]. A similar result was reported by Kim et al concerning PC treatment of toluene in the laboratory [41].…”

Effect of key parameters on the photocatalytic oxidation of toluene at low concentrations in air under 254+185nm UV irradiation

“…Formaldehyde yield was highly dependent on the relative humidity, particularly for the experiment carried out at short residence time, in which Y F reached values as high as ~20% for intermediate RH levels (10% and 33%). Instead, dry air conditions did not favor the formation of formaldehyde in either case, suggesting that the presence of surface OH groups may play an important role in the pathways leading to formation of this byproduct, presumably through oxidative cleavage of the methyl group (side chain), as opposed to the oxidation of the aromatic ring [46]. The population of surface OH is regenerated through dissociative chemisorption of water vapor under humidified air, thus becoming a limiting factor under dry air [39,40,43].…”

Photocatalytic oxidation of gaseous ammonia over fluorinated TiO2 with exposed (001) facets

“…Selective catalytic oxidation (SCO) is an effective method to degrade NH 3 , but the oxidation reaction generally requires a high temperature [5][6][7]. Photocatalytic oxidation (PCO) could eliminate the indoor air pollutants such as formaldehyde and volatile organic compounds under ultraviolet (UV) light irradiation at ambient temperature; therefore, it is a promising method for indoor air NH 3 destruction [8][9][10][11]. A few studies have been focused on the photocatalytic removal of gaseous NH 3 .…”