Doping of fluorine into SrTiO3 by spray pyrolysis for H2 evolution under visible light irradiation

Synergistic Performance between Visible-Light Photocatalysis and Thermocatalysis for VOCs Oxidation over Robust Ag/F-Codoped SrTiO3

“…The presence of the F 1s peak around 684.2 eV in F-STO and Ag/F-STO (Figure 2a) indicates the successful introduction of fluorine ions into the STO lattice, which is easily achieved through partial substitution of oxygen ions by fluorine ions due to their similar ionic size. 27,28 In the Ti 2p spectra (Figure 2b), the Ti 2p 3/2 and Ti 2p 1/2 of both STO and Ag/STO, respectively, locate at 458.7 and 464.5 eV, suggesting the Ti 4+ state in these samples. 29 Upon fluorine doping, the negative shift of the Ti 2p peaks to lower binding energies is observed in both F-STO and Ag/F-STO, which is related to partial formation of Ti 3+ as a charge compensation for fluorine ions substitution.…”

“…UV–vis absorption spectra of STO, F-STO, Ag/STO, and Ag/F-STO are shown in Figure a. As compared, Ag/STO and Ag/F-STO show a remarkable higher visible light absorption than STO and F-STO due to the SPR effect of Ag NP. , Besides, F – doping in F-STO and Ag/F-STO enhances the visible-light absorption to some content, which is attributed to the formation of the acceptor Ti 3+ level caused by F – doping . For the pristine semiconductor, the band gaps of STO and F-STO are estimated from the tangent lines by the square root of the Kubelka–Munk function against photon energy , (Figure S2, Supporting Information).…”

“…16,20 Besides, F − doping in F-STO and Ag/F-STO enhances the visible-light absorption to some content, which is attributed to the formation of the acceptor Ti 3+ level caused by F − doping. 27 For the pristine semiconductor, the band gaps of STO and F-STO are estimated from the tangent lines by the square root of the Kubelka−Munk function against photon energy 7,8 (Figure S2, Supporting Information). In this way, the band gaps of STO (∼3.28 eV) and F-STO (∼3.26 eV) are calculated.…”

Synergistic Effect of Metal Complex and Dual Doped Graphitic Carbon Nitride for Superior Photocatalytic Hydrogen Evolution

“…Numerous photocatalysts have been synthesized to be used as a potential catalyst for H 2 production using sunlight or visible light irradiation. In the pursuit of an efficient photocatalytic hydrogen evolution reaction (HER), numerous metal oxides such as SrTiO 3 , BiVO 4 , WO 3 ; metal sulfides such as Co 9 S 8 , MoS 2 ; and metal phosphides such as Ni 2 P were synthesized and examined.…”

Synthesis of SrTiO3–TiN Nanocomposites with Enhanced Photocatalytic Activity under Simulated Solar Irradiation

“…Because of its high photosensitivity, suitable band gap and good structural stability, which leads to relatively high driving force for the reduction–oxidation procedures, respectively, some kinds of semiconductor included titanium dioxide, zinc oxide and tungsten oxide, etc., have been proven to be promising photocatalyst in organic pollution degradation. In addition, many efforts have been taken to extend the photoresponse to visible region and reduce the combination of photogenerated electrons and holes including doping metal elements (Co 2+ , Ru 3+ , Fe 3+ , Cr 3+ and Mn 3+ ), − , narrow band gap semiconductors coupling and some investigations demonstrate that compared with a single semiconductor, composite semiconductors possess enhanced photoelectrochemical properties.…”