KTaO3-based nanocomposites for air treatment

Combined experimental and computational approach to developing efficient photocatalysts based on Au/Pd–TiO2nanoparticles

“…TiO 2 reactivity in visible light (λ > 400 nm) can be achieved in several ways, through various structure/surface modifications: [11][12][13][14][15][16] (a) metal doping; [17][18][19][20] (b) non-metal doping; [21][22][23] (c) selfdoping (reductive treatments); [24][25][26][27][28][29][30] (d) surface modifications by noble-metal nanoparticles of Ag, Au, Pt, and Pd; [31][32][33][34][35][36][37][38][39][40][41][42][43] (e) the use of dye-modified TiO 2 [44][45][46] and (f) coupling TiO 2 with other semiconductors 47,48 (e.g., CdS). [49][50][51][52] In some cases, such doped or modified TiO 2 showed lower activity in the UV spectral range compared to the pristine TiO 2 . Due to their optical and electronic structure-dependent properties, bimetallic nanoparticles (such as Au/Pd) seem to be a useful and promising type of metal nanoparticles used for TiO 2 modification, aimed at solar-driven environmental applications.…”

Perovskite Strontium Doped Rare Earth Manganites Nanocomposites and Their Photocatalytic Performances

“…In each method there are parameters to play with in order to improve the properties of the required materials. A lot of perovskite oxides have been synthesized such as tantalate [39][40][41][42][43], titanate [14,[44][45][46][47][48][49][50], ferrite, [51,52] vanadium-and niobium-based perovskites [53][54][55][56], and manganites [57,58] and they have shown visible light photocatalytic activity as a result of their unique electronic properties and crystal structures [59]. The reduced band-gap energy values in the doped alkaline rare-earth transition metal perovskite-like structure oxides focus more attention because this property enhances the separation of charge carriers (photogenerated electrons and holes) [60].…”

Some Unitary, Binary, and Ternary Non-TiO2 Photocatalysts

“…Unfortunately, the morphology was not well developed and crystal structures of each single semiconductor were not formed. In four subsequent cycles, the photoactivity using the KTaO 3 /CdS/MoS 2 (10:5:1) ranged 60% after 60 min of irradiation [245]. Hong et al found that highly enhanced photocatalytic activity is due to synergistic effects of heterostructured ZnS/CuS/CdS material which can improve light absorption and charge carriers flow.…”