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Title: | Fe-TiO2/AC and Co-TiO2/AC Composites: Novel Photocatalysts Prepared from Waste Streams for the Efficient Removal and Photocatalytic Degradation of Cibacron Yellow F-4G Dye | Authors: | MACHADO GARCIA, Roberto CARLEER, Robert Arada Pérez, Maria PUENTE TORRES, Jeamichel Gu, Ying SAMYN, Pieter YPERMAN, Jan |
Issue Date: | 2021 | Publisher: | MDPI | Source: | Catalysts, 11 (10) (Art N° 1137) | Abstract: | Fe-TiO2/AC and Co-TiO2/AC composites were prepared from activated carbon (AC) derived from residues of peanut hulls and TiO2 photocatalyst, electrochemically prepared from titanium scrap, and doped with Fe and Co, respectively. The adsorption capacity and photocatalytic activity of the Fe-TiO2/AC and Co-TiO2/AC composites were studied for removing and degrading Cibacron Yellow F-4G (CYF-4G) from wastewater. Doped ACs were characterized by thermogravimetric (TGA), scanning electron microscopy (SEM), X-ray diffraction (XRD), a new X-ray absorption technique (XRA), and elemental analysis (EA). Interesting relationships were found between SEM, XRA, and TGA data and the doped amount of catalyst on ACs. Optimal dye adsorption was found at a pH of 2.0. The CYF-4G adsorption kinetics are followed according to the pseudo-second order model. The experimental data revealed that the Langmuir model fit better than the Freundlich and Temkin models. A decrease in adsorption capacity was observed when the catalyst dope percentage increased. A removal and degradation efficiency of the dye close to 100% was achieved around 120 min. A synergistic adsorption and photocatalytic degradation effect of the Fe-TiO2/AC and Co-TiO2/AC composites could be observed when adsorption experiments were conducted under simulated visible radiation. | Keywords: | peanut hull;activated carbon;CYF-4G;Fe-TiO2/AC and Co-TiO2/AC composites;photocatalytic degradation | Document URI: | http://hdl.handle.net/1942/35464 | e-ISSN: | 2073-4344 | DOI: | 10.3390/catal11101137 | ISI #: | 000712427000001 | Rights: | 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2022 |
Appears in Collections: | Research publications |
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catalysts-11-01137-v3.pdf | Published version | 4.37 MB | Adobe PDF | View/Open |
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