1. 3D/2D Ln3+-doped BiOBr/rGO heterostructure with enhanced photocatalytic performance
- Author
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Jie Yin, Shujuan Yao, Wei Wang, Yanhui Sun, Xingchuan Zhao, Hua Yang, Ke Wu, Hu Xing, and Xiaozhen Ren
- Subjects
Materials science ,Oxide ,Bioengineering ,02 engineering and technology ,010402 general chemistry ,Photochemistry ,01 natural sciences ,law.invention ,chemistry.chemical_compound ,law ,General Materials Science ,Photodegradation ,Absorption (electromagnetic radiation) ,Graphene ,Doping ,Heterojunction ,General Chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,chemistry ,Modeling and Simulation ,Photocatalysis ,0210 nano-technology ,Visible spectrum - Abstract
Three-dimensional/two-dimensional (3D/2D) rare earth Ln3+ (Ln = Er or Eu)-doped BiOBr wrapped with reduced graphene oxide (Bi-Ln/rGO) was obtained via a two-step solvothermal–hydrothermal process. The doping of Ln3+ and the construction of heterojunction between 3D Ln3+-doped BiOBr microspheres and 2D rGO nanosheets were beneficial to the wide absorption of visible light and the efficient separation of photoinduced electrons and holes, further improving the photocatalytic activity of Bi-Ln/rGO composites for RhB photodegradation. The photocatalytic activity of Bi-Ln/rGO was higher than those of pure BiOBr, Ln3+-doped BiOBr, and BiOBr/rGO. The radical-trapping experiments on active species indicated that h+ and ·O2− were mainly responsible for the photodegradation of RhB. The mechanism of the enhanced photocatalytic performance was proposed on the basis of radical-trapping experiments on active species.
- Published
- 2019