Hybrid bismuth oxyhalides@gypsum as self-cleaning composites: novel aspects of a sustainable photocatalytic technology for solar environmental cleanup

Hani Gnayem, Vladimir Uvarov, Ofer Lahad, Yoel Sasson

Research output: Contribution to journalArticlepeer-review

Abstract

Herein we report the fabrication of a novel heterojunctioned BiOClxBr1-x@gypsum composite and its application as a self-cleaning surface for the straightforward use in construction and building materials. The morphology, chemical composition and crystal structure of the hybrid material were characterized using X-ray diffraction and scanning electron microscopy. The photocatalytic activity of the new composite was investigated for the degradation of naphthalene and rhodamine B (RhB) under visible light (λ ≥ 420 nm) irradiation. Our results show rapid and complete destruction of the RhB dye after only 4 minutes under Xe visible light irradiation (422-740 nm) and 2.5 minutes under mild sunlight illumination. Total organic carbon measurements could verify the absolute mineralization of the recalcitrant naphthalene contamination, as a state of the art example, within 20 minutes of visible light illumination.

Original languageAmerican English
Pages (from-to)66650-66656
Number of pages7
JournalRSC Advances
Volume5
Issue number82
DOIs
StatePublished - 29 Jul 2015

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering

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