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- Title
Comparative Photocatalytic Performance on the Degradation of 2-Naphthol Under Simulated Solar Light Using α-BiVO Synthesized by Solid-State and Co-precipitation Methods.
- Authors
González, Lucy; Leyva-Porras, C.; Sánchez-Domínguez, M.; Maza, Iván; Longoria Rodríguez, F.
- Abstract
In this investigation, the photocatalytic activity of α-BiVO in the degradation of 2-naphthol under simulated solar light was evaluated. Bismuth vanadate α-BiVO was synthesized by the solid-state reaction method and by co-precipitation in aqueous media, with the aim of comparing their performance in the photodegradation of the aromatic pollutant. The latter method (co-precipitation) has not been previously reported for the synthesis of α-BiVO. Structural evolution of the oxides precursors was determined by X-ray diffraction. Morphology and optical properties of the solids were analyzed by scanning electron microscopy (SEM) and UV-vis diffuse reflectance spectroscopy (UV-vis), respectively. The results showed that at 800 °C, only α-BiVO was formed in both preparations. The SEM micrographs revealed that the powders were composed of agglomerates with sizes between 0.8-2 μm for those synthesized by co-precipitation and 2-10 μm for those obtained by solid-state reaction. The optical properties indicated that α-BiVO was activated with visible light during the photocatalytic process. The photocatalytic degradation of 2-naphthol was largely influenced at basic pH, degrading 79% of the contaminant in 240 min, with the powder obtained by co-precipitation; meanwhile, for the solid-state preparation, the degradation reached only 55%.
- Subjects
PHOTOCATALYSIS; COPRECIPITATION (Chemistry); SPECTROMETRY; PHENOLS; SOIL degradation
- Publication
Water, Air & Soil Pollution, 2017, Vol 228, Issue 2, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-017-3242-7