Bi2O3 quantum-dot decorated nitrogen-doped Bi3NbO7 nanosheets: in situ synthesis and enhanced visible-light photocatalytic activity

作者：Hou, Jungang^*; Wang, Zheng; Jiao, Shuqiang; Zhu, Hongmin

来源：CrystEngComm, 2012, 14(18): 5923-5928.

DOI：10.1039/c2ce25504a

• ARCHITECTURES
• DESIGN
• H-2

The Bi2O3 quantum dots decorated nitrogen doped Bi3NbO7 nanosheets (Bi2O3/N-Bi3NbO7) were successfully synthesized via a facile in situ hydrothermal process as a straightforward protocol. The peony-like N-Bi3NbO7 hierarchical architectures decorated with surface enrichment of Bi2O3 quantum dots were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectra, UV-vis diffuse reflectance spectrum and photoluminescence spectra. The as-prepared Bi2O3/N-Bi3NbO7 heterostructures exhibited higher photocatalytic activities in the decomposition of model pollutants under visible-light irradiation than N-Bi3NbO7 nanosheets in the absence of any expensive metal components and co-catalysts, which could be attributed to the enhanced light absorbance multiple reflections in the heterostructures, the enhanced photosensitizing effect of the surface enriched Bi2O3 quantum dots and the strong interaction between Bi2O3 and N-Bi3NbO7. Furthermore, the Bi2O3/N-Bi3NbO7 heterostructures exhibited strong durability that may be ascribed to the high hydrothermal stability of the flower-like structure and the inhibition of Bi2O3 leaching owing to its tight chemical bonding with N-Bi3NbO7 nanosheets.

• 出版日期2012
• 单位北京科技大学