Coated mesh photocatalytic reactor for air treatment applications: comparative study of support materials

Abstract

An experimental comparative study of different meshes as support materials for photocatalytic applications in gas phase is presented. The photocatalytic oxidation of dichloromethane in air was addressed employing different coated meshes in a laboratory-scale, continuous reactor. Two fiberglass meshes and a stainless steel mesh were studied regarding the catalyst load, adherence, and catalytic activity. Titanium dioxide photocatalyst was immobilized on the meshes by dip-coating cycles. Results indicate the feasibility of the dichloromethane elimination in the three cases. When the number of coating cycles was doubled, the achieved conversion levels were increased twofold for stainless steel and threefold for the fiberglass meshes. One of the fiberglass meshes (FG2) showed the highest reactivity per mass of catalyst and per catalytic surface area.

Anticorrosion Coated Stainless Steel as Durable Support for C-N-TiO2 Photo Catalyst Layer

“…The photo catalytic coating was confirmed by the presence of Ti and N in SS/C-N-TiO 2 mesh shown by the elemental composition in Table 1 . From SEM and EDS results obtained on SS/C-N-TiO 2 sample, the sol-gel based coating of C-N-TiO 2 was adhering on SS support and is comparable to the highlights of Passalía et al [ 53 ].…”

“…The photo catalytic coating was confirmed by the presence of Ti and N in SS/C-N-TiO 2 mesh shown by the elemental composition in Table 1. From SEM and EDS results obtained on SS/C-N-TiO 2 sample, the sol-gel based coating of C-N-TiO 2 was adhering on SS support and is comparable to the highlights of Passalía et al [53]. The EDS results of uncoated discs and those of C-N-TiO 2 deposited on anticorrosion meshes by pyrolysis of the sol gel layer disclosed are shown in Table 1a,b.…”