Facile aqueous synthesis of Bi4O5Br2 nanosheets for improved visible-light photocatalytic activity
| Autor: | Bouasavanh Souvanhthong, Hongmei Ma, Gongjuan Wu, Yan Zhao, Yawen Li, Jingzhe Zhao |
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| Rok vydání: | 2018 |
| Předmět: |
Fabrication
Materials science Aqueous solution Process Chemistry and Technology 02 engineering and technology Electronic structure Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Chemical engineering law Materials Chemistry Ceramics and Composites Photocatalysis Irradiation Absorption (chemistry) 0210 nano-technology Electron paramagnetic resonance |
| Zdroj: | Ceramics International. 44:5392-5401 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2017.12.168 |
| Popis: | Bi4O5Br2 nanosheets have been fast synthesized via a facile aqueous method. The morphology, crystal structure, optical property, and electronic structure of the obtained samples were discussed. During the reaction process, it was found that the reaction parameters including the amount of NaBr and the amount of NaOH significantly influenced the composition and structure of the samples. The photocatalytic performance of the prepared samples was explored by degrading BPA under visible-light irradiation. Bi4O5Br2 nanosheets exhibited enhanced photocatalytic activity in comparison to BiOBr or Bi5O7Br, which can be attributed to its higher visible-light absorption and lower interface charge transport resistance. Additionally, the photocatalytic degradation mechanism over Bi4O5Br2 nanosheets was also investigated. h+ and •O2− were the main photoactive species during the visible-light photocatalytic process by quencher experiments and EPR results. This study is expected to provide new insights into the development on facile fabrication and potential application of Bi-deficient bismuth oxybromide photocatalysts. |
| Databáze: | OpenAIRE |
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