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Synthesis of CuCo2O4/BiVO4composites as promise and efficient catalysts for 4-nitrophenol reduction in water: Experimental and theoretical study

Mirzaee Valadi, F ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jece.2021.105408
  3. Publisher: Elsevier Ltd , 2021
  4. Abstract:
  5. This study investigates the synthesis of CuCo2O4, BiVO4, and CuCo2O4/BiVO4 nanocomposite by the solvothermal method. The Physico-chemical properties of the samples were verified through Fourier Transform Infrared (FTIR) spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Transmission Electron microscope (TEM), energy-dispersive X-ray spectroscopy (EDS), Brunauer-Emmett-Teller (BET). Evaluation of catalytic efficiency of the synthesized samples were done in promoting the 4-Nitrophenol reduction to 4-Aminophenol in the existence of high amount of sodium borohydride (NaBH4) as a reducing agent, and the progress of the catalytic reaction was monitored using UV-visible spectrophotometry. The CuCo2O4/BiVO4 nanocomposite exhibited much higher catalytic activity for the 4-Nitrophenol reduction reaction than individual components CuCo2O4 and BiVO4. Furthermore, other analyses such as kinetics and thermodynamics were carried out to understand the catalytic behavior. Work function was calculated by density functional theory (DFT) to investigate the reaction mechanism. The results indicated that nanocomposite CuCo2O4/BiVO4 is a stable and promising catalyst in treating organic wastewater. © 2021 Elsevier Ltd
  6. Keywords:
  7. Bismuth compounds ; Catalyst activity ; Density functional theory ; Enamels ; Energy dispersive spectroscopy ; Field emission microscopes ; Fourier transform infrared spectroscopy ; Nanocomposites ; Reaction kinetics ; Scanning electron microscopy ; Sodium Borohydride ; Transmission electron microscopy ; Wastewater treatment ; Work function ; 4-Nitrophenol ; 4-Nitrophenol reductions ; Catalytic reduction ; Density-functional theory calculations ; Efficient catalysts ; Fourier transform infra reds ; Physicochemical property ; Solvothermal method ; Synergistic effect ; Theoretical study ; Copper compounds
  8. Source: Journal of Environmental Chemical Engineering ; Volume 9, Issue 4 , 2021 ; 22133437 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S2213343721003857