A new family of BiO(ClxBr1 − x) visible light sensitive photocatalysts |
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| Authors: | Sanaa Shenawi-Khalil Vladimir Uvarov Yulia Kritsman Ella Menes Inna Popov Yoel Sasson |
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| Affiliation: | 1. Casali Institute of Applied Chemistry, The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel;2. The Unit for Nanoscopic Characterization, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel |
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| Abstract: | A new family of BiO(ClxBr1 − x) photocatalysts have been synthesized by a hydrothermal method. The photocatalytic activity of the new material was measured on the degradation of Rhodamine B (RhB) and Acetophenone (AP) and photooxidation of potassium iodide in water under UV–vis and visible light (λ ≥ 420 nm) irradiations. In comparison to Degussa P25, the new photoactive material with x = 0.5 demonstrated 3 times higher rate in removing aqueous RhB under visible light irradiation. A morphology, chemical composition and crystalline structure of BiO(ClxBr1 − x) were characterized using scanning electron microscopy and powder X-ray diffraction. The values of their unit cell parameters depend on Cl/Br ratio and they change according to the Vegard's law. |
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| Keywords: | Photocatalysis Photocatalytic degradation Bismuth Oxyhalides BiOCl-BiOBr Rietveld refinement UV&ndash vis visible light irradiations |
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