Recent intensification strategies of SnO2-based photocatalysts: A review

From Adsorbent to Photocatalyst: The Sensitization Effect of SnO2 Surface towards Dye Photodecomposition

“…Among various semiconducting materials, tin dioxide (SnO 2 ) is a promising candidate for a photocatalyst due to its non-toxicity, stability, high oxidation ability (valence band edge at 3.80 V vs. NHE [ 7 ]), high electron mobility (∼100–200 cm 2 V −1 s −1 [ 8 ]), chemical inertness, photocorrosion resistance, and relatively low cost [ 7 , 8 , 9 ]. However, its photocatalytic activity is limited due to a wide bandgap (3.6–3.8 eV [ 10 ]) and fast recombination of photogenerated charge carriers [ 9 ].…”

“…Among various semiconducting materials, tin dioxide (SnO 2 ) is a promising candidate for a photocatalyst due to its non-toxicity, stability, high oxidation ability (valence band edge at 3.80 V vs. NHE [ 7 ]), high electron mobility (∼100–200 cm 2 V −1 s −1 [ 8 ]), chemical inertness, photocorrosion resistance, and relatively low cost [ 7 , 8 , 9 ]. However, its photocatalytic activity is limited due to a wide bandgap (3.6–3.8 eV [ 10 ]) and fast recombination of photogenerated charge carriers [ 9 ]. To date, various strategies have been applied to extend its absorption range to visible light, such as doping, self-doping, stoichiometry alteration, and the formation of solid solutions or heterojunctions [ 9 , 11 , 12 , 13 ].…”

“…However, its photocatalytic activity is limited due to a wide bandgap (3.6–3.8 eV [ 10 ]) and fast recombination of photogenerated charge carriers [ 9 ]. To date, various strategies have been applied to extend its absorption range to visible light, such as doping, self-doping, stoichiometry alteration, and the formation of solid solutions or heterojunctions [ 9 , 11 , 12 , 13 ]. The latter is a particularly promising approach, as heterostructures also allow better charge-carrier separation and the matching of semiconductors with appropriate band edge potentials for redox reactions [ 9 ].…”

“…To date, various strategies have been applied to extend its absorption range to visible light, such as doping, self-doping, stoichiometry alteration, and the formation of solid solutions or heterojunctions [ 9 , 11 , 12 , 13 ]. The latter is a particularly promising approach, as heterostructures also allow better charge-carrier separation and the matching of semiconductors with appropriate band edge potentials for redox reactions [ 9 ]. Since photogenerated charge carriers are transferred between coupled materials, their interface structure is extremely important [ 14 ].…”

Hydrogen evolution via noble metals based photocatalysts: A review

“…Recently, Passi and Pal have summarized modification strategies including noble metal doping on calcium titanate (CaTiO3) and production of green currency energy [47]. The latest development on SnO2-based photocatalysts such as dye-sensitized and noble metal modified SnO2 has been investigated by Sun et al [48]. In recent years, new semiconductor photocatalysts such as indium vanadate (InVO4) coupling with noble metals have been considered for energy/environmental applications, which Young et al have given an overview on the challenges and future researches [49].…”