Influences of inorganic binder on photocatalytic oxidation (PCO) and degradation of nano/micro TiO2 containing acrylic composites

Photocatalytic paints for NOx removal: Influence of various weathering conditions

“…The STO profile illustrated in Figure 2(a) is interesting in that there is negligible NO2 generated throughout the irradiation period, which is unusual for any photocatalytic film, given reaction eqns ( 1) -(3), and suggests that for this non-weathered film, little or none of the NO2 generated in the photocatalytic reaction ( 2) is lost to the flowing gas stream passing through the reactor, for reasons that remain unclear. Unfortunately, this and other work [10][11][12][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] shows that this highly desirable feature (i.e. one in which only NO is removed and no NO2 is generated) is absent in all weathered commercial photocatalytic paints and photocatalytic films, coated on an inert substrate like glass, when tested under the NO ISO conditions.…”

“…For example, if the ratio is set too high, the photocatalytic activation of the paint film will be ineffective and the film will have a low activity, whereas if set too low, the organic resin will be rapidly destroyed and the paint film longevity will be severely compromised due to photochalking. Although many studies have been carried out on the ability of photocatalytic paints to remove NOx, VOC's and other pollutants [10][11][12][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30], in most a photocatalytic form of TiO2, such as P25 TiO2, or VLP 7000, has simply been added to a commercial paint [10,12,17,[19][20][21][25][26][27][28][29].…”

Highly Porous SnO2/TiO2 Heterojunction Thin-Film Photocatalyst Using Gas-Flow Thermal Evaporation and Atomic Layer Deposition

“…However, despite their high performance, particle-type photocatalysts require additional separation processes in the suspension system, leading to high costs. Additionally, they cause secondary contamination resulting from the organic and inorganic binders in the synthesis and deposition process, thereby limiting their application [18][19][20]. Furthermore, most fabrication methods for particle-type heterojunctions involve complicated preparation processes and exhibit lower microstructure and chemical composition reproducibility [21].…”

Facile synthesis of C, N-TiO2 nanorods via layered Ti 3 O 7 2 − -TMAH interlaminar bonding interaction and their enhanced catalytic performance

“…Photocatalytic nanomaterials have excellent degradation performance due to their high specific surface area [10][11][12]. In particular, TiO 2 nanomaterials appear to be a promising green catalyst due to its environmental safety, low cost and no secondary pollution [13][14][15][16]. However, low visible light utilization, the rapid recombination of electron-hole pairs and few surface reactive sites have obviously limited their practical applications [17].…”