Synthesis and photocatalytic efficiency of sol-gel Al³⁺-doped TiO₂ thin films: correlation between the structural, morphological and optical properties

Enhanced Structural, Optical, And Photocatalytic Activities Of Cuo/Tio2:Zro2 Catalysts For Degrading Methyl Orange (MO) Dye Under UV–Visible Irradiation.

“…In order to solve these problems, several methods have been studied such as i) modifying the surface area, crystallinity, and porosity of TiO2 particles, ii) doping and codoping the surface with metals (Al, Se, Er, Ba, Cd, and Co) [14][15][16][17][18][19] and nonmetals (N, S, and C) [20][21][22], and iii) combining p-type materials with TiO2 particles to be a p-n heterojunction semiconductor [23]. Among them, coupling TiO2 with another semiconductor with a small bandgap such as CuO, PbS and CdS, is a promising strategy for increasing the activity in the visible-light region or allowing photogenerated electrons to be transferred from the conduction band to other semiconductors to inhibit recombination of the electron-hole pair.…”