UV-A photocatalytic treatment of Legionella pneumophila bacteria contaminated airflows through three-dimensional solid foam structured photocatalytic reactors

TiO2 photocatalysis for the degradation of pollutants in gas phase: From morphological design to plasmonic enhancement

“…Keller's group made nice advancements in this domain by using foam-like supports for various gas phase applications, including disinfection of airborne bacteria. [139][140][141] An alternative strategy has been explored by Tytgat et al, who fabricated self-supporting TiO 2 foams using a direct foaming technique ( Figure 7b). [142] It was shown that these TiO 2 foams were active towards PCO of ethylene in the gas phase.…”

β-SiC alveolar foams as a structured photocatalytic support for the gas phase photocatalytic degradation of methylethylketone

“…Recently, in the wake of the interest they received as support in thermal catalysis, three-dimensionally ordered porous solid alveolar foams attracted growing attention in photocatalysis and were reported to be a very interesting structural support for use as photocatalytic filters [3] for their capacity to increase the light penetration within the monolithic reactors and their ability to process high flow rates with very low pressure drops. They consist of cellular monoliths characterized by the geometric structure of the cells (i.e., shape and size) and the way they are distributed, their most characteristic parameters being the cell size, the strut or bridge diameter and the window size or pore diameter [10,11]. A recent model developed for ␤-SiC foams by Edouard based on the packing of regular pentagonal dodecahedron (Fig.…”

“…The use of ␤-SiC alveolar foams as structured photocatalyst support remains scarce in comparison to that of metallic and ceramic foams -mainly made of nickel or aluminum [13][14][15][16][17], and alumina or cordierite [18][19][20][21][22][23][24], respectively -and in a lesser extent to that of polymeric [11] and carbon foams [25,26]. However, they benefit from a high thermal and chemical stability, that allows the monolith to operate safely in severe basic or acidic reaction conditions.…”

Inactivation of airborne viruses using vacuum ultraviolet photocatalysis for a flow-through indoor air purifier with short irradiation time

“…The majority of studies on UV PCO have focused on water disinfection using TiO 2 aqueous suspensions or self-decontaminating TiO 2 surfaces (Guo et al 2012;Rincón and Pulgarin 2004;Sunada et al 1998); only a few studies have been conducted on UV photocatalytic disinfection of airborne bacteria or viruses, which are often called bioaerosols (Daikoku et al 2015;Josset et al 2010;Keller et al 2005;Lin et al 2010;Pal et al 2008;Pigeot-Remy et al 2014;RodriguesSilva et al 2017). Furthermore, VUV photocatalytic inactivation of bioaerosols has not been explored yet (Table 1).…”

“…The performance of UV photocatalysis is influenced by several factors such as relative humidity (RH), irradiation time, distance between the catalyst and the lamp, shape of the catalyst, specific energy input, ratio of catalyst area to reactor volume (S/V; m 2 /m 3 ), and ratio of reactor volume to the power of the lamp (V/P; m 3 /W) (Josset et al 2010;Mo et al 2005). In this study, we evaluated the feasibility of a high flow-rate VUV photocatalysis system for inactivating airborne viruses in terms of these factors.…”