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Synthesis of BiOI/Mordenite Composites for Photocatalytic Treatment of Organic Pollutants Present in Agro-Industrial Wastewater

Recently, bismuth oxyiodide (BiOI) is an attractive semiconductor to use in heterogeneous photocatalysis processes. Unfortunately, BiOI individually shows limited photocatalytic efficiency, instability, and a quick recombination of electron/holes. Considering the practical application of this semico...

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Autores principales: Gallegos-Alcaíno, Alejandra, Robles-Araya, Nathaly, Avalos, Camila, Alfonso-Alvarez, Alexander, Rodríguez, Carlos A., Valdés, Héctor, Sánchez-Flores, Norma A., Durán-Alvarez, Juan C., Bizarro, Monserrat, Romero-Salguero, Francisco J., Mera, Adriana C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9000862/
https://www.ncbi.nlm.nih.gov/pubmed/35407279
http://dx.doi.org/10.3390/nano12071161
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author Gallegos-Alcaíno, Alejandra
Robles-Araya, Nathaly
Avalos, Camila
Alfonso-Alvarez, Alexander
Rodríguez, Carlos A.
Valdés, Héctor
Sánchez-Flores, Norma A.
Durán-Alvarez, Juan C.
Bizarro, Monserrat
Romero-Salguero, Francisco J.
Mera, Adriana C.
author_facet Gallegos-Alcaíno, Alejandra
Robles-Araya, Nathaly
Avalos, Camila
Alfonso-Alvarez, Alexander
Rodríguez, Carlos A.
Valdés, Héctor
Sánchez-Flores, Norma A.
Durán-Alvarez, Juan C.
Bizarro, Monserrat
Romero-Salguero, Francisco J.
Mera, Adriana C.
author_sort Gallegos-Alcaíno, Alejandra
collection PubMed
description Recently, bismuth oxyiodide (BiOI) is an attractive semiconductor to use in heterogeneous photocatalysis processes. Unfortunately, BiOI individually shows limited photocatalytic efficiency, instability, and a quick recombination of electron/holes. Considering the practical application of this semiconductor, some studies show that synthetic zeolites provide good support for this photocatalyst. This support material permits a better photocatalytic efficiency because it prevents the quick recombination of photogenerated pairs. However, the optimal conditions (time and temperature) to obtain composites (BiOI/ synthetic zeolite) with high photocatalytic efficiency using a coprecipitation-solvothermal growth method have not yet been reported. In this study, a response surface methodology (RSM) based on a central composite design (CCD) was applied to optimize the synthesis conditions of BiOI/mordenite composites. For this purpose, eleven BiOI/mordenite composites were synthesized using a combined coprecipitation-solvothermal method under different time and temperature conditions. The photocatalytic activities of the synthesized composites were evaluated after 20 min of photocatalytic oxidation of caffeic acid, a typical organic pollutant found in agro-industrial wastewater. Moreover, BiOI/mordenite composites with the highest and lowest photocatalytic activity were physically and chemically characterized using nitrogen adsorption isotherms, scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and diffuse reflectance spectroscopy (DRS). The optimal synthesis conditions prove to be 187 °C and 9 h. In addition, the changes applied to the experimental conditions led to surface property modifications that influenced the photocatalytic degradation efficiency of the BiOI/mordenite composite toward caffeic acid photodegradation.
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spelling pubmed-90008622022-04-12 Synthesis of BiOI/Mordenite Composites for Photocatalytic Treatment of Organic Pollutants Present in Agro-Industrial Wastewater Gallegos-Alcaíno, Alejandra Robles-Araya, Nathaly Avalos, Camila Alfonso-Alvarez, Alexander Rodríguez, Carlos A. Valdés, Héctor Sánchez-Flores, Norma A. Durán-Alvarez, Juan C. Bizarro, Monserrat Romero-Salguero, Francisco J. Mera, Adriana C. Nanomaterials (Basel) Article Recently, bismuth oxyiodide (BiOI) is an attractive semiconductor to use in heterogeneous photocatalysis processes. Unfortunately, BiOI individually shows limited photocatalytic efficiency, instability, and a quick recombination of electron/holes. Considering the practical application of this semiconductor, some studies show that synthetic zeolites provide good support for this photocatalyst. This support material permits a better photocatalytic efficiency because it prevents the quick recombination of photogenerated pairs. However, the optimal conditions (time and temperature) to obtain composites (BiOI/ synthetic zeolite) with high photocatalytic efficiency using a coprecipitation-solvothermal growth method have not yet been reported. In this study, a response surface methodology (RSM) based on a central composite design (CCD) was applied to optimize the synthesis conditions of BiOI/mordenite composites. For this purpose, eleven BiOI/mordenite composites were synthesized using a combined coprecipitation-solvothermal method under different time and temperature conditions. The photocatalytic activities of the synthesized composites were evaluated after 20 min of photocatalytic oxidation of caffeic acid, a typical organic pollutant found in agro-industrial wastewater. Moreover, BiOI/mordenite composites with the highest and lowest photocatalytic activity were physically and chemically characterized using nitrogen adsorption isotherms, scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and diffuse reflectance spectroscopy (DRS). The optimal synthesis conditions prove to be 187 °C and 9 h. In addition, the changes applied to the experimental conditions led to surface property modifications that influenced the photocatalytic degradation efficiency of the BiOI/mordenite composite toward caffeic acid photodegradation. MDPI 2022-03-31 /pmc/articles/PMC9000862/ /pubmed/35407279 http://dx.doi.org/10.3390/nano12071161 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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/).
spellingShingle Article
Gallegos-Alcaíno, Alejandra
Robles-Araya, Nathaly
Avalos, Camila
Alfonso-Alvarez, Alexander
Rodríguez, Carlos A.
Valdés, Héctor
Sánchez-Flores, Norma A.
Durán-Alvarez, Juan C.
Bizarro, Monserrat
Romero-Salguero, Francisco J.
Mera, Adriana C.
Synthesis of BiOI/Mordenite Composites for Photocatalytic Treatment of Organic Pollutants Present in Agro-Industrial Wastewater
title Synthesis of BiOI/Mordenite Composites for Photocatalytic Treatment of Organic Pollutants Present in Agro-Industrial Wastewater
title_full Synthesis of BiOI/Mordenite Composites for Photocatalytic Treatment of Organic Pollutants Present in Agro-Industrial Wastewater
title_fullStr Synthesis of BiOI/Mordenite Composites for Photocatalytic Treatment of Organic Pollutants Present in Agro-Industrial Wastewater
title_full_unstemmed Synthesis of BiOI/Mordenite Composites for Photocatalytic Treatment of Organic Pollutants Present in Agro-Industrial Wastewater
title_short Synthesis of BiOI/Mordenite Composites for Photocatalytic Treatment of Organic Pollutants Present in Agro-Industrial Wastewater
title_sort synthesis of bioi/mordenite composites for photocatalytic treatment of organic pollutants present in agro-industrial wastewater
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9000862/
https://www.ncbi.nlm.nih.gov/pubmed/35407279
http://dx.doi.org/10.3390/nano12071161
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