Fabrication of heterostructured BiOBr/Bi{sub 24}O{sub 31}Br{sub 10}/TiO{sub 2} photocatalyst by pyrolysis of MOF composite for dye degradation
- State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211 (China)
- Key Laboratory for Molecular Design and Nutrition Engineering of Ningbo, Ningbo Institute of Technology, Zhejiang University, Ningbo, Zhejiang 315100 (China)
The pyrolysis of metal-organic frameworks has emerged as a promising route to synthesize metal oxides with diverse phase compositions, morphologies, sizes and surface areas. The BiOBr/Bi{sub 24}O{sub 31}Br{sub 10}/TiO{sub 2} (BBT) heterostructures have been achieved for the first time by calcining BiOBr/MIL-125(Ti) composite at 500 °C in air. The BBT-2 composite exhibited the highest photocatalytic performance for degradation of RhB under visible light irradiation. The enhanced photocatalytic activity is attributed to narrower band-gaps and synergistic effect originating from the well-aligned straddling band-structures between BiOBr, Bi{sub 24}O{sub 31}Br{sub 10} and TiO{sub 2}, also result in an faster interfacial charge transfer during the photocatalytic reaction. This work could be conductive to the design of heterostructured photocatalysts contained metal oxide by pyrolytic conversion of metal-organic frameworks for significantly improved photocatalytic performance. - Graphical abstract: A novel BiOBr/Bi{sub 24}O{sub 31}Br{sub 10}/TiO{sub 2} heterostructure was achieved by calcining BiOBr/MIL-125(Ti) composite and exhibited the photocatalytic performance for degradation of RhB. Display Omitted - Highlights: • A novel BiOBr/Bi{sub 24}O{sub 31}Br{sub 10}/TiO{sub 2} heterostructure was achieved by calcining BiOBr/MIL-125(Ti) composite. • The heterostructure exhibited the photocatalytic performance for degradation of RhB. • The enhanced photocatalytic activity is attributed to synergistic effect between BiOBr, Bi{sub 24}O{sub 31}Br{sub 10} and TiO{sub 2}. • This work could be conductive to the design of heterostructured photocatalysts by pyrolytic conversion of MOF.
- OSTI ID:
- 22742052
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 255; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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