Photocatalytic Activity of Rutile Ti1−xSnxO2Solid Solutions

A spatially resolved study on the Sn diffusion during the sintering process in the active layer of dye sensitised solar cells

“…The chemical state of the diffused SnO 2 and the effect on the performance of the cell needs further attention because of its unknown effect to the overall performance of DSSCs. These effects may not necessarily be negative, as reported in literature the photocatalytic activity of TiO 2 has been increased when using semiconductor coupled systems like SnO 2 /TiO 2 , [16][17][18] in particular doping the anatase lattice with Sn cations enhances the separation of photogenerated pairs. 19 Obviously, as reported in literature, higher sintering temperatures cause an excellent removal of organic binders and solvents.…”

Electronic and structural properties of SnxTi1−xO2 solid solutions: a periodic DFT study

“…Thus, if suitable electron and hole scavengers are available to trap the electron or hole, recombination is suppressed and the photoactivity of the semiconductor catalyst is enhanced. Lin et al found that Sn substitution for Ti in rutile TiO 2 increases the photoactivity of the rutile by 15 times for the oxidation of acetone [8]. Furthermore, the activity increases with increasing Sn in Sn x Ti 1−x O 2 solid solution, and it peaks at a tin content of 0.075.…”

“…In addition, the use of Sn x Ti 1−x O 2 solid solution in environmental catalysis has also been examined because of its photocatalytic activity as it exhibits high quantum yield. It has been shown that small Sn substitution for Ti in rutile TiO 2 increases the photoactivity of the rutile by 15 times for the oxidation of acetone [8]. Addition of Sn into TiO 2 , endows the catalyst with major photoactivity to decompose methyl orange which is an organic compound model that exhibits good resistance to light degradation [9].…”

“…The knowledge of the bulk electronic structure of this mixed oxide would aid in the design of gas sensing devices and catalysts exhibiting unique features. Therefore, the structural and electronic properties of Sn x Ti 1−x O 2 solid solutions have been subjected to extensive experimental [1,[3][4][5][6]8,[12][13][14][15][16][17][18][19] and recent theoretical [20] studies. A detailed understanding of the electronic structure of Sn x Ti 1−x O 2 solid solution, however, lags behind these achievements.…”

Electronic Structure and Origin of Visible-Light Activity of C-Doped Cubic In2O3 from First-Principles Calculations

“…However, its widespread application has been restricted to ultraviolet light (λ < 385 nm) due to its wide band gap (~3.2 eV for anatase and 3.0 eV for rutile). To shift the absorption edge to the visible light region, much experimental and theoretical activity to specify and fabricate such photocatalysts has been reported, e.g., by anionic or cationic impurity doping [2,3,4], dye sensitization, and in combination with smaller band gap semiconductor [5,6]. However, there exist typically some drawbacks in TiO 2 -based photocatalysts, such as the large formation energy required by impurity doping, fast electron-hole recombination, and small gap narrowing.…”