Rhodium doping augments photocatalytic activity of barium titanate: effect of electronic structure engineering

Abstract

Environmentally friendly BaTiO3 is emerging as a potential photocatalyst due to its tunable electronic structure. Although originally believed to be poor photocatalyst due to its wide band gap several strategies...

Vanadium doped CaTiO3 cuboids: role of vanadium in improving the photocatalytic activity

“…The thermodynamic parameters such as, activation energy (Ea), free energy of activation (ΔG # ), enthalpy of activation (ΔH # ) and entropy of activation (ΔS # ) were computed by employing activation complex theory and Eyring equation. 35,51 From the values tabulated we observe that higher energy of activation is required for the photodegradation of MB without catalyst, whereas relatively lower energy of activation is needed in the presence of CaTiO3 and V-doped CaTiO3 catalysts. This confirms that the catalyst alters the path of the reaction by lowering the activation energy barrier.…”

“…These binding energy values confirmed the existence of +4 oxidation state for Ti in the 1.0 V sample (Figure 4b). 50,51 Further, it is observed that the shift in the peaks for Ca 2p3/2 (346.2 eV in CaTiO3) and 2p1/2 (349.9 eV in CaTiO3) is less compared to Ti 2p3/2 (458.1 eV in CaTiO3)…”

“…Comparison of the photocatalytic activity of 1.0 V with the previously reported ones show that our material is highly efficient (Table S1). 24,25,30,32,35,50,51,[61][62][63][64][65] where, Co is the initial concentration of dye, C is the concentration of the dye at irradiation time 't' and 'k' is the first order rate constant. 'k' is calculated from the slope of the linear fit of -ln(C/Co) versus 't'.…”

Role of Surface Defects and Optical Band-gap Energy on Photocatalytic Activities of Titanate-based Perovskite Nanomaterial

“…Bhat et al [50] reported the influence of Rh occupying sites in BaTiO 3 electronic structure. The samples were prepared by one-pot hydrothermal method and photocatalytic activities of the samples were evaluated against MB under visible light source.…”

One-step preparation of RGO/Fe3O4–FeVO4 nanocomposites as highly effective photocatalysts under natural sunlight illumination

“…Different approaches like doping and compositing used to enhance the structural properties and photodegradation efficiency of the prepared nanomaterials. Various modified metal oxide such as, Vanadium doped CaTiO 3 11 , Rh doped SrTiO 3 12 , Rhodium doping barium titanate 13 , Graphene Wrapped SrTiO3 Nanocomposite 14 , … etc. have been prepared by different approaches and applied as efficient photocatalysts.…”