Fabrication and characterization of a novel magnetic recyclable ternary photocatalyst Dy(OH)3/ZnO/SrFe12O19

• Published in: Optical materials 2024-09, Vol.155, p.115875, Article 115875
• Main Authors: Wang, Yanxi, Zou, Yi, Chen, Rui, Xiong, Tao, Jin, Gang, Xu, Longjun, Liu, Chenglun
• Format: Article
• Language: English
• Subjects: Dy(OH)3/ZnO/SrFe12O19; Magnetic photocatalyst; Wastewater treatment
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2024.115875

In this work, a novel magnetic photocatalyst Dy(OH)3/ZnO/SrFe12O19 (DZS) was prepared by simple hydrothermal method. Especially, 15-DZS-5 (Dy(OH)3 15 %, SrFe12O19 5 %) had the highest photocatalytic activity, and could completely degrade RhB when exposed to simulative sunlight for 70 min. Furthermore, 15-DZS-5 has the widest photoresponse range, the narrowest band gap, the lowest electron hole recombination rate and the best conductivity due to the photosensitization effect of SrFe12O19 and Dy(OH)3 successfully separating the electrons and holes of ZnO by photoelectron capture. In addition, the saturation magnetization of 15-DZS-5 is 3.9 emu/g, and the degradation of RhB is over 88 % after five cycles, showing good magnetic recovery and stable photocatalytic activity. ·OH and ·O2− were the chief active groups in the photocatalytic RhB with 15-DZS-5 sample, and the influence of ·OH was more significant. •A novel magnetic photocatalyst Dy(OH)3/ZnO/SrFe12O19 (DZS) is successfully fabricated by hydrothermal method.•DZS presents an excellent degradation rate of RhB, and is easily recovered with magnet.•DZS still maintains high photocatalytic performance after five cycles.