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Article

Photocatalytic Degradation of Tetracycline by ZnO/γ-Fe2O3 Paramagnetic Nanocomposite Material

1
Department of Biological and Environmental Sciences and Technologies, University of Salento, Via per Monteroni, 73100 Lecce, Italy
2
Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, INSTM, Via G. Giusti 9, 50121 Firenze, Italy
3
Department of Engineering of Innovation, University of Salento, Via per Monteroni, 73100 Lecce, Italy
4
Department of Chemical Engineering, An-Najah National University, P.O. Box 7, Nablus, Palestine
5
Department of Cultural Heritage, University of Salento, Via D. Birago, 64, 73100 Lecce, Italy
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(8), 1458; https://doi.org/10.3390/nano10081458
Received: 6 July 2020 / Revised: 21 July 2020 / Accepted: 24 July 2020 / Published: 25 July 2020
In recent years, the presence of numerous xenobiotic substances, such as antibiotics, has been detected in water environments. They can be considered as environmental contaminants, even if their effect on human health has yet to be totally understood. Several approaches have been studied for the removal of these kinds of pollutants. Among these compounds, tetracycline (TC), a broad-spectrum antibiotic, is one of the most commonly found in water due to its widespread use. In the context of reducing the presence of TC in aqueous solution, in this contribution, a composite catalyst based on zinc oxide (ZnO) and iron oxide (γ-Fe2O3) was developed and its photocatalytic properties were investigated. The catalytic materials were synthesized by a microwave-assisted aqueous solution method and characterized by Field Emission Scanning Electron Microscope (FESEM), X-Ray Fluorescence (XRF) and Brunauer−Emmett−Teller (BET) analysis. The TC concentration was evaluated by spectrophotometer measurements at specific time intervals. The performed photocatalytic experiments clearly demonstrated that the ZnO/γ-Fe2O3 composite catalyst presents significant photocatalytic activity, indeed a TC degradation efficiency of 88.52% was registered after 150 min. The presence of iron oxide in the structure of the catalyst enhances both the surface area and the pore volume, facilitating the adsorption of the analyte on the surface of nanostructures, a fundamental phase to optimize a photodegradation process. Moreover, ZnO was found to play the key role in the photocatalytic process assisted by γ-Fe2O3 which enhanced the TC degradation efficiency by 20%. View Full-Text
Keywords: tetracycline; photocatalytic degradation; zinc oxide; iron oxide; nanocomposite catalyst tetracycline; photocatalytic degradation; zinc oxide; iron oxide; nanocomposite catalyst
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MDPI and ACS Style

Semeraro, P.; Bettini, S.; Sawalha, S.; Pal, S.; Licciulli, A.; Marzo, F.; Lovergine, N.; Valli, L.; Giancane, G. Photocatalytic Degradation of Tetracycline by ZnO/γ-Fe2O3 Paramagnetic Nanocomposite Material. Nanomaterials 2020, 10, 1458. https://doi.org/10.3390/nano10081458

AMA Style

Semeraro P, Bettini S, Sawalha S, Pal S, Licciulli A, Marzo F, Lovergine N, Valli L, Giancane G. Photocatalytic Degradation of Tetracycline by ZnO/γ-Fe2O3 Paramagnetic Nanocomposite Material. Nanomaterials. 2020; 10(8):1458. https://doi.org/10.3390/nano10081458

Chicago/Turabian Style

Semeraro, Paola, Simona Bettini, Shadi Sawalha, Sudipto Pal, Antonio Licciulli, Fabio Marzo, Nicola Lovergine, Ludovico Valli, and Gabriele Giancane. 2020. "Photocatalytic Degradation of Tetracycline by ZnO/γ-Fe2O3 Paramagnetic Nanocomposite Material" Nanomaterials 10, no. 8: 1458. https://doi.org/10.3390/nano10081458

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