Photocatalytic degradation of SO2 using TiO2-containing silicate as a building coating material

Photochemical removal of NO and SO2 from flue gas using UV irradiation

“…, it was found that UV irradiation alone was not effective for NO and SO 2 removal. Krishnan et al revealed the intermolecular collision among gas components made the excited SO 2 return to the ground state easily, inhibiting the SO 2 reaction. The slow reaction of 1 SO 2 –SO 2 under UV irradiation was also confirmed in the study of Shang et al…”

Self-Cleaning Mineral Paint for Application in Architectural Heritage

“…The use of self-cleaning photocatalytic titania additives in paints containing organic binders and additives is controversial, thus limiting their applicability. The use of silicate binder not only prevents the coating from self-degradation but also enhances the photoactivity of the painted surface as the active TiO 2 pigments are more open to the environment due to the porous nature of the coatings [15,16]. It is evidenced from the literature that some previous researchers have studied the effect of alkali silicates as the inorganic binder in paint formulation but this system has not been explored extensively so far, especially in photoactive self-cleaning coatings [11,[15][16][17].…”

“…It is evidenced from the literature that some previous researchers have studied the effect of alkali silicates as the inorganic binder in paint formulation but this system has not been explored extensively so far, especially in photoactive self-cleaning coatings [11,[15][16][17]. Either different types of mineral binders have been investigated [11,17] or commercial silicate paints have been used in paint formulation [15,16]. In any case even when mineral paints are used, some organic components are generally employed [15].…”

“…The use of silicate binder not only prevents the coating from self-degradation but also enhances the photoactivity of the painted surface as the active TiO 2 pigments are more open to the environment due to the porous nature of the coatings [15,16]. It is evidenced from the literature that some previous researchers have studied the effect of alkali silicates as the inorganic binder in paint formulation but this system has not been explored extensively so far, especially in photoactive self-cleaning coatings [11,[15][16][17]. Either different types of mineral binders have been investigated [11,17] or commercial silicate paints have been used in paint formulation [15,16].…”

Influence of domestic and environmental weathering in the self-cleaning performance and durability of TiO2 photocatalytic coatings

“…Subsequently, hydroxyl ions can be preferentially adsorbed into the TiO 2 oxygen vacancies, thus an increased hydrophilicity of the TiO 2 surface is induced [9]. Both the photo-induced hydrophilicity and the photocatalytic degradation of pollutants allow for the exploitation of TiO 2 -based selfcleaning materials in the construction industry [8,10,11]. Currently, many of such light-responsive materials are commercially available [8,9] and the interest in the photocatalysis is confirmed by the increasing number of published papers (> 16800 papers from 2008 to 2017 [12]); however, for the practical application of such a functional coating, crucial information such as the chemical durability of TiO 2 photocatalytic coatings [13][14][15][16][17][18][19][20][21][22] and the influence of weathering on their self-cleaning performance [13,15,17,18,23] are needed.…”