Comparison on photocatalytic degradation of gaseous formaldehyde by TiO2, ZnO and their composite

KTaO3-based nanocomposites for air treatment

“…The advantage is that photocatalytic methods allow removing VOCs, NO x , SO 2 , deodorants, and microorganisms at the same system [3]. It was previously reported that photodegradation could be used to remove toluene [4][5][6] styrene [4] and formaldehyde [7] from the gas phase. Based on the literature data, it could be concluded that the efficiency of the photocatalytic air treatment system depends on activity and surface area of the photocatalyst and type and power of irradiation source.…”

Photocatalytic degradation of endocrine disruptor Bisphenol-A in the presence of prepared CexZn1−xO nanocomposites under irradiation of sunlight

“…It is a synthetic method where particle size can be controlled easily at low process temperature (Chauhan et al, 2012). Excellent photo catalytic activity of ZnO for liquid pollutants has been reported Habibi and Askari, 2011), but little is known for degradation of volatile organic compounds (Liao et al, 2012). Generation and recombination of photo induced electrons and holes are critical in photocatalysis.…”

Preparation of Gd-doped TiO2 hollow spheres with enhanced photocatalytic performance

“…In order to improve its photocatalytic activity, many attempts have been made: coupling TiO 2 with other semiconductors of narrow band gap such as PbS [5,6], making composites with other oxide semiconductors such as WO 3 , ZnO and SiO 2 [7][8][9], doping TiO 2 with metals or nonmetals, e.g., Ag, Pd, Pt, N [10][11][12][13], etc. Recently, because of their low density and large specific surface area, TiO 2 hollow spheres have been intensively studied [14][15][16].…”