Journal
MATERIALS
Volume 13, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/ma13061322
Keywords
bismuth vanadate; cooper oxide; 4-nitrophenol; photoelectrocatalysis; degradation
Categories
Funding
- Brazilian National Council for Scientific and Technological Development - CNPq [404556/2018-1, 404086/2016-0, 305627/2018-0, 302874/2017-8, 427452/2018-0]
- Sao Paulo Research Foundation (FAPESP) [2014/50945-4, 2017/10118-0]
- INCTAA [CNPq 465768/2018-8, FAPESP 2014/50951-4]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [001]
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The present work reports the degradation of 4-nitrophenol using BiVO4/CuO hybrid material synthesized by the precipitation of BiVO4 in the presence of CuO. Morphological and structural characterizations were performed using X-ray diffraction and scanning electronic microscopy coupled to energy dispersive X-ray spectroscopy. Through the calculation of the Kubelka-Munk function applied to diffuse reflectance spectrophotometry data, the hybrid material presented absorption edge of 1.85 eV. The formation of p-n heterojunction between BiVO4 and CuO renders the hybrid material suitable for the construction of a photoanode employed in hydroxyl radical generation. UV-vis spectrophotometry and high-performance liquid chromatography experiments were performed in order to monitor the degradation of 4-nitrophenol and the formation of secondary products. Additional information regarding the hybrid material was obtained through ion chromatography and total organic carbon analyses. The application of BiVO4/CuO-based photocatalyzer led to a 50.2% decrease in total organic carbon after the degradation of 4-nitrophenol. Based on the results obtained in the study, BiVO4/CuO has proved to be a promising material suitable for the removal of recalcitrant compounds in water treatment plants.
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