Effect of annealing temperature on structure and photocatalytic efficiency of SnO microspheres synthesized by ultrasonic reaction method

• Published in: Ceramics international Vol. 44; no. 18; pp. 23334 - 23338
• Main Authors: Liang, Baoyan, Sun, Changhong, Han, Danhui, Zhang, Wangxi, Zhang, Ruijie, Zhang, Yanli, Liu, Ying
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.12.2018
• Subjects: Annealing; Lattice distortion; Photocatalysis; SnO; SnO2; SnO2; Annealing; Lattice distortion; SnO; Photocatalysis
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2018.09.112

SnO microspheres were synthesized by a simple one-step ultrasonic reaction method. SnO materials were annealed at 150–250 °C to enhance their photocatalytic performance by adjusting their phase composition and lattice distortion. Effects of annealed temperature on the phase composition, microstructure and photocatalytic performance of SnO materials were investigated in detail. The results reveal that the annealing treatment considerably affected phase composition, absorption in the visible light zone, and the photocatalytic activity of the SnO materials. At increased temperature, SnO2 content in the products gradually increased. At 250 °C, SnO materials were transformed to SnO2. Correspondingly, the photocatalytic activity of the samples improved gradually with increasing temperature. The excellent photocatalytic efficiency of 98.3% within 40 min for the SnO microspheres annealed at 225 °C was achieved under the visible-light irradiation. The enhancement of the photocatalytic activity of this sample can be ascribed to lattice distortion of SnO combined with increased SnO2 content.