Enhanced photo-catalytic activity of TiO2 nanostructured thin films under solar light by Sn and Nb co-doping

Machine Learning Band Gaps of Doped-TiO2 Photocatalysts from Structural and Morphological Parameters

“…The experimental data used, shown in Table (columns 1–5), are obtained from the literature. ,− The data set covers a wide range of anatase TiO 2 that are prepared through different synthesis methods and doped with various elements. A total of 60 TiO 2 photocatalysts with the energy band gap, E g , ranging from 2.280 to 3.250 eV are explored.…”

“…Metal ions, such as Zr, Cr, and W, are reported to inhibit the anatase-to-rutile phase transformation. , Transition metals, such as Cu, and rare-earth metals, such as La, lead to the lattice deformation and the formation of oxygen vacancies, resulting in an impurity state in the TiO 2 band gap, which improves the absorption of visible light by narrowing the band gap. , Nonmetal doping, such as the nitrogen incorporation into the TiO 2 lattice or on its surface, has been reported to benefit the improvement of photoefficiency under UV/visible light . Both single doping and codoping methods have been applied to the TiO 2 photocatalyst fabrication by incorporating various elements into the crystal structure. ,− The addition of foreign elements results in lattice distortions and changes in the E g due to electronegativities, ionic radius differences, and introductions of impurity states . In addition to chemical doping, various preparation methods of TiO 2 photocatalysts can influence the band gap narrowing differently.…”

“…It is, therefore, of great importance to investigate correlations among the tunability of the E g , lattice parameters, and the surface area. Qualitative analysis on the effect of dopant types and levels on the E g of TiO 2 photocatalysts has been conducted through experiments. ,− Quantitative analysis through thermodynamics models and first-principle models has been utilized to aid the understanding of the optical performance of these materials and facilitate the tuning of doped-TiO 2 E g . , However, these models require a significant amount of data inputs, such as variables for equations of state and orbital configurations, which can only be obtained by extensive measurements. The requirement of computational power also increases significantly when it comes to the codoping situation.…”

Synthesis of nanosized amorphous and nanocrystalline TiO2 for photochemical oxidation of methomyl insecticide in aqueous media

“…Recently, nanostructured materials reveal a high surface area to volume ratio with unique characteristics for efficient photocatalytic treatment. Previous studies have focused on the synthesis of the unique properties of nanostructured titanium dioxide for improving its catalytic performance (Hochbaumand and Yang, 2010; Kaleji et al , 2013). One approach for achieving a sustainable photocatalyst with an efficient cost is the use of amorphous materials.…”