tailieunhanh - Photocatalytic activities of sulfur doped SrTiO3 under simulated solar irradiation

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 eV and enhanced the photocatalytic activity for methylene blue degradation of % after 180 min irradiation. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 19, SOÁ K6- 2016 Photocatalytic activities of sulfur doped SrTiO3 under simulated solar irradiation Hong Khanh Le Kieu Oanh Pham Thy Thong Tran Minh Vien Le – Email: lmvien@ Inorganic Chemical Engineering Department, Ho Chi Minh City University of Technology (Manuscript Received on July, 2016, Manuscript Revised on September, 2016) ABSTRACT S-doped SrTiO3 was synthesized by the solid state reaction method between S and BET. The photocatalytic activities of S-doped SrTiO3 was also investigated through the SrTiO3 power under the N2 flow. The effect of decomposition of methylene blue. As a result, temperature, calcination time and S-content on the formation and photocatalytic activity of the 10 %S-doped SrTiO3 contributed to the decrease of band gap energy to eV and SrTiO3 were investigated. The morphology and properties of obtained powders were enhanced the photocatalytic activity for methylene blue degradation of % after 180 characterized by XRD, UV-DRS, UV-VIS, SEM, min irradiation. Keywords: S-doped SrTiO3, photocatalytic activity, methylene blue. 1. INTRODUCTION Strontium titanate (SrTiO3) is one of important materials which has applications in large energy gap (–), and thus, more than 95% solar light would be wasted [3]. In recent years, some groups have carried photocatalysis and electronics industry and has attracted much attention from both fundamental out the studies on the doping sulfur into TiO2 lattice to red shift the absorption edge. It was and practical viewpoints [1]. As an efficient found that sulfur is more efficient for improving photocatalyst, strontium titanate (SrTiO3) has been widely researched for the degradation of the photocatalytic activity under visible light region [4]. For example, Zhou Zhiqiang et al [5] various organic contaminants, such as dyes and other organic compounds, contributing to solve prepared S-doped nanosized TiO2. The asprepared .