Details

Autor(en) / Beteiligte

• Wu, Guoling
• Li, Ping
• Xu, Dongbo
• Luo, Bifu
• Hong, Yuanzhi
• Shi, Weidong
• Liu, Chunbo

Titel

Hydrothermal synthesis and visible-light-driven photocatalytic degradation for tetracycline of Mn-doped SrTiO3 nanocubes

Ist Teil von

• Applied surface science, 2015-04, Vol.333, p.39-47

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2015

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •The Mn-doped SrTiO3 samples were synthesized by a hydrothermal method.•The Mn4+ doping can greatly enhance photocatalytic activity for tetracycline degradation under visible light irradiation.•Characterization of Mn doped SrTiO3 by HRTEM-STEM.•The possible photocatalytic mechanism of tetracycline degradation is determined by active species trapping experiments and ESR analysis. Visible-light-driven manganese doped SrTiO3 nanocubes with various manganese atomic percentages in the range of 3–7%, were prepared by a hydrothermal method. These obtained photocatalysts were systematically characterized by XRD, EDX, TEM, STEM, XPS, UV–vis, PL, EIS. The results demonstrated that the Mn4+ has substituted into the lattice of SrTiO3 nanocubes and the absorption onset shifted toward the visible region. It is beneficial to the photocatalytic degradation of tetracycline under the visible light irradiation. Interestingly, the optimal doping atomic percentages at 5% exhibited the highest degradation rates (66.7%) in 60min. The high photocatalytic activity could be ascribed to the Mn doping adjustment the energy band of SrTiO3 and the highly effective separation of photo-generated electron–hole pairs. Furthermore, the possible photocatalytic mechanism has been discussed based on the active species trapping experiments and ESR analysis.