Abstract
S-doped SrTiO3 was synthesized by the solid state reaction method between S and SrTiO3 power under the N2 flow. The effect of temperature, calcination time and S-content on the formation and photocatalytic activity of SrTiO3 were investigated. The morphology and properties of obtained powders were characterized by XRD, UV-DRS, UV-VIS, SEM, BET. The photocatalytic activities of S-doped SrTiO3 was also investigated through the decomposition of methylene blue. As a result, the 10 %S-doped SrTiO3 contributed to the decrease of band gap energy to 2.73 eV and enhanced the photocatalytic activity for methylene blue degradation of 74.5 % after 180 min irradiation.
Highlights
Strontium titanate (SrTiO3) is one of important materials which has applications in photocatalysis and electronics industry and has attracted much attention from both fundamental and practical viewpoints [1]
The results indicated that the amount of sulfur doping could enhance the photocurrent
Each experiment consisted of 0.1 g catalyst, which was dispersed into 200 mL solution of 10 ppm methylene blue, the solution was kept in darkness for 1 hours in order to reach absorption/desorption equilibrium
Summary
Strontium titanate (SrTiO3) is one of important materials which has applications in photocatalysis and electronics industry and has attracted much attention from both fundamental and practical viewpoints [1]. The asprepared S-doped TiO2 nanosized possessed strong absorption for visible light of 400―650 nm, and showed high photocatalytic activity for decomposition of methylene blue under irradiation of visible light. Teruhisa Ohno et al [7] succeeded in preparing S-doped TiO2 photocatalysts which shows relatively high photocatalytic activity under visible light at wavelengths longer than 500 nm, may have a wide range of applications. The modified SrTiO3 by sulfur photocatalytic material were synthesized and characterized using analytical techniques such as XRD, SEM, UV-vis (DRS). Their photocatalytic activities were evaluated by studying the degradation of methylene blue under visible light irradiation
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