Facile green synthesis of BiOBr nanostructures with superior visible-light-driven photocatalytic activity

Seema Garg, Mohit Yadav, Amrish Chandra, Sameer Sapra, Soniya Gahlawat, Pravin P. Ingole, Milica Todea, Eniko Bardos, Zsolt Pap, K. Hernádi

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Abstract

Novel green bismuth oxybromide (BiOBr-G) nanoflowers were successfully synthesized via facile hydrolysis route using an Azadirachta indica (Neem plant) leaf extract and concurrently, without the leaf extract (BiOBr-C). The Azadirachta indica leaf extract was employed as a sensitizer and stabilizer for BiOBr-G, which significantly expanded the optical window and boosted the formation of photogenerated charge carriers and transfer over the BiOBr-G surface. The photocatalytic performance of both samples was investigated for the degradation of methyl orange (MO) and phenol (Ph) under the irradiation of visible light. The leaf extract mediated BiOBr-G photocatalyst displayed significantly higher photocatalytic activity when compared to BiOBr-C for the degradation of both pollutants. The degradation rate of MO and Ph by BiOBr-G was found to be nearly 23% and 16% more when compared to BiOBr-C under visible light irradiation, respectively. The substantial increase in the photocatalytic performance of BiOBr-G was ascribed to the multiple synergistic effects between the efficient solar energy harvesting, narrower band gap, high specific surface area, porosity, and effective charge separation. Furthermore, BiOBr-G displayed high stability for five cycles of photocatalytic activity, which endows its practical application as a green photocatalyst in the long run.

Original languageEnglish
Article number1273
JournalMaterials
Volume11
Issue number8
DOIs
Publication statusPublished - Jul 24 2018

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Keywords

  • Bismuth oxybromide
  • Hydrolysis
  • Methyl orange
  • Phenol
  • Photocatalysis

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Garg, S., Yadav, M., Chandra, A., Sapra, S., Gahlawat, S., Ingole, P. P., Todea, M., Bardos, E., Pap, Z., & Hernádi, K. (2018). Facile green synthesis of BiOBr nanostructures with superior visible-light-driven photocatalytic activity. Materials, 11(8), [1273]. https://doi.org/10.3390/ma11081273