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Parra-Marfil A, Ocampo-Pérez R, Aguilar-Madera CG, Carrasco-Marín F, Pérez-Cadenas AF, Bueno-López A, Bailón-García E. Modeling and experimental analysis of CO 2 methanation reaction using Ni/CeO 2 monolithic catalyst. Environ Sci Pollut Res Int 2024:10.1007/s11356-024-33327-5. [PMID: 38662292 DOI: 10.1007/s11356-024-33327-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 04/11/2024] [Indexed: 04/26/2024]
Abstract
In this study, the effect of the cell density of monolithic catalysts was investigated and further mathematically modeled on cordierite supports used in CO2 methanation. Commercial cordierite monoliths with 200, 400, and 500 cpsi cell densities were coated by immersion into an ethanolic suspension of Ni/CeO2 active phase. SEM-EDS analysis confirmed that, owing to the low porosity of cordierite (surface area < 1 m2 g-1), the Ni/CeO2 diffusion into the walls was limited, especially in the case of low and intermediate cell density monoliths; thus, active phase was predominantly loaded onto the channels' external surface. Nevertheless, despite the larger exposed surface area in the monolith with high cell density, which would allow for better distribution and accessibility of Ni/CeO2, its higher macro-pore volume resulted in some introduction of the active phase into the walls. As a result, the catalytic evaluation showed that it was more influenced by increments in volumetric flow rates. The low cell density monolith displayed diffusional control at flow rates below 500 mL min-1. In contrast, intermediate and high cell density monoliths presented this behavior up to 300 mL min-1. These findings suggest that the interaction reactants-catalyst is considerably more affected by a forced non-uniform flow when increasing the injection rate. This condition reduced the transport of reactants and products within the catalyst channels and, in turn, increased the minimum temperature required for the reaction. Moreover, a slight diminution of selectivity to CH4 was observed and ascribed to the possible formation of hot spots that activate the reverse water-gas shift reaction. Finally, a mathematical model based on fundamental momentum and mass transfer equations coupled with the kinetics of CO2 methanation was successfully derived and solved to analyze the fluid dynamics of the monolithic support. The results showed a radial profile with maximum fluid velocity located at the center of the channel. A reactive zone close to the inlet was obtained, and maximum methane production (4.5 mol m-3) throughout the monolith was attained at 350 °C. Then, linear streamlines of the chemical species were developed along the channel.
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Affiliation(s)
- Adriana Parra-Marfil
- Materiales Polifuncionales Basados en Carbono (UGR-Carbon), Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada (UEQ-UGR), 18071, Granada, ES, Spain
- Centro de Investigación y Estudios de Posgrado (CIEP), Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí (FCQ-UASLP), 78260, San Luis Potosí, MX, Mexico
| | - Raúl Ocampo-Pérez
- Centro de Investigación y Estudios de Posgrado (CIEP), Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí (FCQ-UASLP), 78260, San Luis Potosí, MX, Mexico
| | - Carlos Gilberto Aguilar-Madera
- Facultad de Ciencias de La Tierra, Universidad Autónoma de Nuevo León (UANL), Carretera a Cerro Prieto Km. 8 Ex Hacienda de Guadalupe, 67700, Linares, MX, Mexico
| | - Francisco Carrasco-Marín
- Materiales Polifuncionales Basados en Carbono (UGR-Carbon), Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada (UEQ-UGR), 18071, Granada, ES, Spain
| | - Agustín Francisco Pérez-Cadenas
- Materiales Polifuncionales Basados en Carbono (UGR-Carbon), Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada (UEQ-UGR), 18071, Granada, ES, Spain
| | - Agustín Bueno-López
- Dpto. de Química Inorgánica, Universidad de Alicante (UA), 03080, Alicante, ES, Spain
| | - Esther Bailón-García
- Materiales Polifuncionales Basados en Carbono (UGR-Carbon), Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada (UEQ-UGR), 18071, Granada, ES, Spain.
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Moral-Rodríguez AI, Ramírez-Valencia LD, Bailón-García E, Carrasco-Marín F, Pérez-Cadenas AF. Green synthesis of BiVO 4/Eco-graphene nanostructures for the elimination of sulfamethoxazole by adsorption and photo-degradation using blue LED light. Environ Res 2024; 247:118120. [PMID: 38199476 DOI: 10.1016/j.envres.2024.118120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 12/29/2023] [Accepted: 01/04/2024] [Indexed: 01/12/2024]
Abstract
Photo-catalysts based on BiVO4 (BV) and Eco-graphene (EG) were synthesized and obtained in a single step with high-quality properties. These nanostructures (NEs) were obtained through a green chemistry route and by adding 2, 3, and 5 wt% of a homemade EG. The BV/X EG NEs (where X = corresponds to the weight % of EG) demonstrated high photocatalytic activity, obtaining Sulfamethoxazole degradation percentages of 40, 45, 52, and 57 for BV, BV/2 EG, BV/3 EG, and BV/5 EG respectively, using a blue LED light. In addition, it was observed that the presence of EG slightly affected the surface area and porosity of BV. Moreover, it was observed that the presence of EG stabilized the scheelite monoclinic phase (m-s), and decreased the crystal size and band-gap values of BV-based samples. It was detected that EG contents increased the BV reduction, creating oxygen vacancies and V4+ states, which favored electron transfer, enhanced the photo-catalytic activity, and decreased the recombination rate. The adsorption influence of the BV/EG system was also studied. Finally, the stability tests of these materials after four cycles of reuse allowed keeping practically the full degradation capacity, demonstrating that these NEs represent a promising material driven by visible light that can be used for wastewater decontamination in the presence of drugs.
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Affiliation(s)
- A I Moral-Rodríguez
- UGR-Carbon - Materiales Polifuncionales Basados en Carbono, Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente - Universidad de Granada, ES18071, Granada, Spain.
| | - L D Ramírez-Valencia
- UGR-Carbon - Materiales Polifuncionales Basados en Carbono, Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente - Universidad de Granada, ES18071, Granada, Spain
| | - E Bailón-García
- UGR-Carbon - Materiales Polifuncionales Basados en Carbono, Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente - Universidad de Granada, ES18071, Granada, Spain
| | - F Carrasco-Marín
- UGR-Carbon - Materiales Polifuncionales Basados en Carbono, Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente - Universidad de Granada, ES18071, Granada, Spain
| | - A F Pérez-Cadenas
- UGR-Carbon - Materiales Polifuncionales Basados en Carbono, Dpto. Química Inorgánica - Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente - Universidad de Granada, ES18071, Granada, Spain.
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Serna-Carrizales JC, Zárate-Guzmán AI, Flores-Ramírez R, Díaz de León-Martínez L, Aguilar-Aguilar A, Warren-Vega WM, Bailón-García E, Ocampo-Pérez R. Application of artificial intelligence for the optimization of advanced oxidation processes to improve the water quality polluted with pharmaceutical compounds. Chemosphere 2024; 351:141216. [PMID: 38224748 DOI: 10.1016/j.chemosphere.2024.141216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 12/29/2023] [Accepted: 01/12/2024] [Indexed: 01/17/2024]
Abstract
Sulfamethoxazole and metronidazole are emerging pollutants commonly found in surface water and wastewater. These compounds have a significant environmental impact, being necessary in the design of technologies for their removal. Recently, the advanced oxidation process has been proven successful in the elimination of this kind of compounds. In this sense, the present work discusses the application of UV/H2O2 and ozonation for the degradation of both molecules in single and binary systems. Experimental kinetic data from O3 and UV/H2O2 process were adequately described by a first and second kinetic model, respectively. From the ANOVA analysis, it was determined that the most statistically significant variables were the initial concentration of the drugs (0.03 mmol L-1) and the pH = 8 for UV/H2O2 system, and only the pH (optimal value of 6) was significant for degradation with O3. Results showed that both molecules were eliminated with high degradation efficiencies (88-94% for UV/H2O2 and 79-98% for O3) in short reaction times (around 30-90 min). The modeling was performed using a quadratic regression model through response surface methodology representing adequately 90 % of the experimental data. On the other hand, an artificial neural network was used to evaluate a non-linear multi-variable system, a 98% of fit between the model and experimental data was obtained. The identification of degradation byproducts was performed by high-performance liquid chromatography coupled to a time mass detector. After each process, at least four to five stable byproducts were found in the treated water, reducing the mineralization percentage to 20% for both molecules.
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Affiliation(s)
- Juan Carlos Serna-Carrizales
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, San Luis Potosí, 78210, Mexico
| | - Ana I Zárate-Guzmán
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, San Luis Potosí, 78210, Mexico; Grupo de Investigación en Materiales y Fenómenos de Superficie, Departamento de Biotecnológicas y Ambientales, Universidad Autónoma de Guadalajara, Av. Patria 1201, C.P, 45129, Zapopan, Jalisco, Mexico.
| | - Rogelio Flores-Ramírez
- Programa Multidisciplinario de Posgrado en Ciencias Ambientales, Universidad Autónoma de San Luis Potosí, Av. Manuel Nava No. 201, San Luis Potosí, 78210, Mexico
| | | | - Angélica Aguilar-Aguilar
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, San Luis Potosí, 78210, Mexico
| | - Walter M Warren-Vega
- Grupo de Investigación en Materiales y Fenómenos de Superficie, Departamento de Biotecnológicas y Ambientales, Universidad Autónoma de Guadalajara, Av. Patria 1201, C.P, 45129, Zapopan, Jalisco, Mexico
| | - Esther Bailón-García
- Grupo de Investigación en Materiales de Carbón, Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Campus Fuente Nueva S/n, 18071, Granada, Spain
| | - Raúl Ocampo-Pérez
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, San Luis Potosí, 78210, Mexico
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Valencia-Valero LC, Fajardo-Puerto E, Elmouwahidi A, Bailón-García E, Carrasco-Marín F, Pérez-Cadenas AF. Facile Synthesis of Carbon-Based Inks to Develop Metal-Free ORR Electrocatalysts for Electro-Fenton Removal of Amoxicillin. Gels 2024; 10:53. [PMID: 38247776 PMCID: PMC10815112 DOI: 10.3390/gels10010053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/04/2024] [Accepted: 01/09/2024] [Indexed: 01/23/2024] Open
Abstract
The electro-Fenton process is based on the generation of hydroxyl radicals (OH•) from hydroxide peroxide (H2O2) generated in situ by an oxygen reduction reaction (ORR). Catalysts based on carbon gels have aroused the interest of researchers as ORR catalysts due to their textural, chemical and even electrical properties. In this work, we synthesized metal-free electrocatalysts based on carbon gels doped with graphene oxide, which were conformed to a working electrode. The catalysts were prepared from organic-gel-based inks using painted (brush) and screen-printed methods free of binders. These new methods of electrode preparation were compared with the conventional pasted method on graphite supports using a binder. All these materials were tested for the electro-Fenton degradation of amoxicillin using a homemade magnetite coated with carbon (Fe3O4/C) as a Fenton catalyst. All catalysts showed very good behavior, but the one prepared by ink painting (brush) was the best one. The degradation of amoxicillin was close to 90% under optimal conditions ([Fe3O4/C] = 100 mg L-1, -0.55 V) with the catalyst prepared using the painted method with a brush, which had 14.59 mA cm-2 as JK and a H2O2 electrogeneration close to 100% at the optimal voltage. These results show that carbon-gel-based electrocatalysts are not only very good at this type of application but can be adhered to graphite free of binders, thus enhancing all their catalytic properties.
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Affiliation(s)
| | - Edgar Fajardo-Puerto
- UGR-Carbon, Materiales Polifuncionales Basados en Carbono, Dpto. Química Inorgánica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada (UEQ-UGR), 18071 Granada, Spain; (L.C.V.-V.); (A.E.); (E.B.-G.); (F.C.-M.)
| | | | | | | | - Agustín Francisco Pérez-Cadenas
- UGR-Carbon, Materiales Polifuncionales Basados en Carbono, Dpto. Química Inorgánica, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada (UEQ-UGR), 18071 Granada, Spain; (L.C.V.-V.); (A.E.); (E.B.-G.); (F.C.-M.)
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Ramírez-Valencia LD, Bailón-García E, Moral-Rodríguez AI, Carrasco-Marín F, Pérez-Cadenas AF. Carbon Gels-Green Graphene Composites as Metal-Free Bifunctional Electro-Fenton Catalysts. Gels 2023; 9:665. [PMID: 37623120 PMCID: PMC10454076 DOI: 10.3390/gels9080665] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/09/2023] [Accepted: 08/16/2023] [Indexed: 08/26/2023] Open
Abstract
The Electro-Fenton (EF) process has emerged as a promising technology for pollutant removal. However, the EF process requires the use of two catalysts: one acting as an electrocatalyst for the reduction of oxygen to H2O2 and another Fenton-type catalyst for the generation of ·OH radicals from H2O2. Thus, the search for materials with bifunctionality for both processes is required for a practical and real application of the EF process. Thus, in this work, bifunctional electrocatalysts were obtained via doping carbon microspheres with Eco-graphene, a form of graphene produced using eco-friendly methods. The incorporation of Eco-graphene offers numerous advantages to the catalysts, including enhanced conductivity, leading to more efficient electron transfer during the Electro-Fenton process. Additionally, the synthesis induced structural defects that serve as active sites, promoting the direct production of hydroxyl radicals via a 3-electron pathway. Furthermore, the spherical morphology of carbon xerogels enhances the accessibility of the reagents to the active sites. This combination of factors results in the effective degradation of Tetracycline (TTC) using metal-free catalysts in the Electro-Fenton process, achieving up to an impressive 83% degradation without requiring any other external or additional catalyst.
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Affiliation(s)
- Lilian D. Ramírez-Valencia
- Materiales Polifuncionales Basados en Carbono (UGR-Carbon), Dpto. Química Inorgánica-Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente-Universidad de Granada (UEQ-UGR), ES18071 Granada, Spain; (E.B.-G.); (A.I.M.-R.); (F.C.-M.)
| | | | | | | | - Agustín F. Pérez-Cadenas
- Materiales Polifuncionales Basados en Carbono (UGR-Carbon), Dpto. Química Inorgánica-Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente-Universidad de Granada (UEQ-UGR), ES18071 Granada, Spain; (E.B.-G.); (A.I.M.-R.); (F.C.-M.)
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Barranco-López A, Moral-Rodríguez AI, Fajardo-Puerto E, Elmouwahidi A, Bailón-García E. Highly graphitic Fe-doped carbon xerogels as dual-functional electro-Fenton catalysts for the degradation of tetracycline in wastewater. Environ Res 2023; 228:115757. [PMID: 36967002 DOI: 10.1016/j.envres.2023.115757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/06/2023] [Accepted: 03/22/2023] [Indexed: 05/16/2023]
Abstract
Fe-doped carbon xerogels with a highly developed graphitic structure were synthesized by a one-step sol-gel polymerization. These highly graphitic Fe-doped carbons are presented as promising dual-functional electro-Fenton catalysts to perform both the electro-reduction of O2 to H2O2 and H2O2 catalytic decomposition (Fenton) for wastewater decontamination. The amount of Fe is key to the development of this electrode material, since affects the textural properties; catalyzes the development of graphitic clusters improving the electrode conductivity; and influences the O2-catalyst interaction controlling the H2O2 selectivity but, at the same time is the catalyst for the decomposition of the electrogenerated H2O2 to OH• radicals for the organic pollutants oxidation. All materials achieve the development of ORR via the 2-electron route. The presence of Fe considerably improves the electro-catalytic activity. However, a mechanism change seems to occur at around -0.5 V in highly Fe-doped samples. At potential lower than -0.5 eV, the present of Feδ+ species or even Fe-O-C active sites favour the selectivity to 2e-pathway, however at higher potentials, Feδ+ species are reduced favoring a O-O strong interaction enhancing the 4e-pathway. The Electro-Fenton degradation of tetracycline was analyzed. The TTC degradation is almost complete (95.13%) after 7 h of reaction without using any external Fenton-catalysts.
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Affiliation(s)
- A Barranco-López
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
| | - A I Moral-Rodríguez
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
| | - E Fajardo-Puerto
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
| | - A Elmouwahidi
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
| | - E Bailón-García
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain.
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Fajardo-Puerto E, Elmouwahidi A, Bailón-García E, Pérez-Cadenas AF, Carrasco-Marín F. From Fenton and ORR 2e−-Type Catalysts to Bifunctional Electrodes for Environmental Remediation Using the Electro-Fenton Process. Catalysts 2023. [DOI: 10.3390/catal13040674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
Currently, the presence of emerging contaminants in water sources has raised concerns worldwide due to low rates of mineralization, and in some cases, zero levels of degradation through conventional treatment methods. For these reasons, researchers in the field are focused on the use of advanced oxidation processes (AOPs) as a powerful tool for the degradation of persistent pollutants. These AOPs are based mainly on the in-situ production of hydroxyl radicals (OH•) generated from an oxidizing agent (H2O2 or O2) in the presence of a catalyst. Among the most studied AOPs, the Fenton reaction stands out due to its operational simplicity and good levels of degradation for a wide range of emerging contaminants. However, it has some limitations such as the storage and handling of H2O2. Therefore, the use of the electro-Fenton (EF) process has been proposed in which H2O2 is generated in situ by the action of the oxygen reduction reaction (ORR). However, it is important to mention that the ORR is given by two routes, by two or four electrons, which results in the products of H2O2 and H2O, respectively. For this reason, current efforts seek to increase the selectivity of ORR catalysts toward the 2e− route and thus improve the performance of the EF process. This work reviews catalysts for the Fenton reaction, ORR 2e− catalysts, and presents a short review of some proposed catalysts with bifunctional activity for ORR 2e− and Fenton processes. Finally, the most important factors for electro-Fenton dual catalysts to obtain high catalytic activity in both Fenton and ORR 2e− processes are summarized.
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Serna-Carrizales JC, Zárate-Guzmán AI, Aguilar-Aguilar A, Forgionny A, Bailón-García E, Flórez E, Gómez-Durán CFA, Ocampo-Pérez R. Optimization of Binary Adsorption of Metronidazole and Sulfamethoxazole in Aqueous Solution Supported with DFT Calculations. Processes (Basel) 2023. [DOI: 10.3390/pr11041009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023] Open
Abstract
Sulfamethoxazole [SMX] and metronidazole [MNZ] are emergent pollutants commonly found in surface water and wastewater, which can cause public health and environmental issues even at trace levels. An efficient alternative for their removal is the application of adsorption technology. The present work evaluated single and binary adsorption processes using granular activated carbon (CAG F400) for SMX and MNZ in an aqueous solution. The binary adsorption process was studied using a Box–Behnken experimental design (RSD), and the results were statistically tested using an analysis of variance. Density functional theory (DFT) modeling was employed to characterize the interactions between the antibiotics and the CAG F400 surface. For the individual adsorption process, adsorption capacities (qe) of 1.61 mmol g−1 for SMX and 1.10 mmol g−1 for MNZ were obtained. The adsorption isotherm model that best fit experimental data was the Radke–Prausnitz isotherm model. The adsorption mechanism occurs through electrostatic and π-π dispersive interactions. For the binary adsorption process, the total binary adsorption capacity achieved was 1.13 mmol g−1, evidencing competitive adsorption. The significant factors that determine the removal of SMX and MNZ from a binary solution were the solution pH and the initial concentration of antibiotics. From DFT studies, it was found that SMX adsorption on CAG F400 was favored with adsorption energy (Eads) of −10.36 kcal mol−1. Finally, the binary adsorption results corroborated that the adsorption process was favorable for both molecules.
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Carrales-Alvarado DH, Leyva-Ramos R, Bailón-García E, Carrasco-Marín F, Villela-Martinez DE. Synthesis, characterization, and application of pristine and clay-templated carbon xerogel microspheres for removing diclofenac and heavy metals from water solution. Environ Sci Pollut Res Int 2023; 30:34684-34697. [PMID: 36515879 DOI: 10.1007/s11356-022-24615-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Organic xerogel microspheres (SX) were synthesized by inverse emulsion sol-gel polymerization and carbonized to obtain carbon xerogel spheres (SXCs). The catalyst was K2CO3 or Fe(C2H3O2)2, and the clay sodium sepiolite (SNa) or exfoliated vermiculite (Vexf) was added during the synthesis. Depending on the catalyst and clays, the SXCs were designated SXC-K, SXC-Fe, Vexf-K, Vexf-Fe, SNa-Fe, and SNa-K. At pH = 7 and T = 25 °C, the SXCs' adsorption capacities towards diclofenac (DCF) in water increased as follows: SXC-K < Vexf-Fe < SXC-Fe < SNa-Fe < SNa-K < Vexf-K and this order is associated with the SXCs' surface area and mesopore volume. The Vexf-K displayed the highest capacity for DCF due to its optimal textural and chemical properties, and the DCF maximum uptake was 560 mg/g at pH = 6 and T = 35 °C. The adsorption capacity towards Cd2+ and Pb2+ decreased as SX-K > SX-Fe > SXC-K > SXC-Fe, indicating that the non-carbonized materials (SX) presented higher adsorption capacity than the SXCs because the SXs had a higher acidic site content. Adding SNa or Vexf to SXs enhanced the adsorption capacity towards Cd(II), and SNa-SX-K presented an exceptionally high capacity of 182.7 mg/g. This synergistic effect revealed that the Cd2+ was adsorbed on the SX-K acidic sites and by cation exchange on the SNa.
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Affiliation(s)
- Damarys H Carrales-Alvarado
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. M. Nava No.6, S.L.P. 78210, San Luis Potosí, México
| | - Roberto Leyva-Ramos
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. M. Nava No.6, S.L.P. 78210, San Luis Potosí, México.
| | - Esther Bailón-García
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avda. Fuentenueva S/N, 18071, Granada, Spain
| | - Francisco Carrasco-Marín
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avda. Fuentenueva S/N, 18071, Granada, Spain
| | - Diana E Villela-Martinez
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. M. Nava No.6, S.L.P. 78210, San Luis Potosí, México
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Parra-Marfil A, López-Ramón MV, Aguilar-Aguilar A, García-Silva IA, Rosales-Mendoza S, Romero-Cano LA, Bailón-García E, Ocampo-Pérez R. An efficient removal approach for degradation of metformin from aqueous solutions with sulfate radicals. Environ Res 2023; 217:114852. [PMID: 36457238 DOI: 10.1016/j.envres.2022.114852] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/18/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
Metformin consumption for diabetes treatment is increasing, leading to its presence in wastewater treatment plants where conventional methods cannot remove it. Therefore, this work aims to analyze the performance of advanced oxidation processes using sulfate radicals in the degradation of metformin from water. Experiments were performed in a photoreactor provided with a low-pressure Hg lamp, using K2S2O8 as oxidant and varying the initial metformin concentration (CA0), oxidant concentration (Cox), temperature (T), and pH in a response surface experimental design. The degradation percentages ranged from 26.1 to 87.3%, while the mineralization percentages varied between 15.1 and 64%. Analysis of variance (ANOVA) showed that the output variables were more significantly affected by CA0, Cox, and T. Besides, a reduction of CA0 and an increase of Cox up to 5000 μM maximizes the metformin degradation since the generation of radicals and their interaction with metformin molecules are favored. For the greatest degradation percentage, the first order apparent rate constant achieved was 0.084 min-1. Furthermore, while in acidic pH, temperature benefits metformin degradation, an opposite behavior is obtained in a basic medium because of recombination and inhibition reactions. Moreover, three degradation pathways were suggested based on the six products detected by HPLC-MS: N-cyanoguanidine m/z = 85; N,N-dimethylurea m/z = 89; N,N-dimethyl-cyanamide m/z = 71 N,N-dimethyl-formamide m/z = 74; glicolonitrilo m/z = 58; and guanidine m/z = 60. Finally, it was shown that in general the toxicity of the degradation byproducts was lower than the toxicity of metformin toward Chlamydomonas reinhardtii.
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Affiliation(s)
- A Parra-Marfil
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, 78260, Mexico; Grupo de Investigación en Materiales del Carbón, Facultad de Ciencias, Universidad de Granada, Campus Fuente Nueva s/n., 18071, Granada, Spain.
| | - M V López-Ramón
- Grupo de Investigación en Materiales de Carbón y Medio Ambiente, Facultad de Ciencias Experimentales, Campus Las Lagunillas s/n, 23071, Jaén, Spain.
| | - A Aguilar-Aguilar
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, 78260, Mexico.
| | - I A García-Silva
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, 78260, Mexico
| | - S Rosales-Mendoza
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, 78260, Mexico.
| | - L A Romero-Cano
- Grupo de Investigación en Materiales y Fenómenos de Superficie, Departamento de Ciencias Biotecnológicas y Ambientales, Universidad Autónoma de Guadalajara, Av. Patria 1201, C.P. 45129, Zapopan, Jalisco, Mexico.
| | - E Bailón-García
- Grupo de Investigación en Materiales del Carbón, Facultad de Ciencias, Universidad de Granada, Campus Fuente Nueva s/n., 18071, Granada, Spain.
| | - R Ocampo-Pérez
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, 78260, Mexico.
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11
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Onrubia-Calvo JA, Quindimil A, Davó-Quiñonero A, Bermejo-López A, Bailón-García E, Pereda-Ayo B, Lozano-Castelló D, González-Marcos JA, Bueno-López A, González-Velasco JR. Kinetics, Model Discrimination, and Parameters Estimation of CO 2 Methanation on Highly Active Ni/CeO 2 Catalyst. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00164] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Jon A. Onrubia-Calvo
- Department of Chemical Engineering, Faculty of Science and Technology, University of the Basque Country UPV/EHU, Barrio Sarriena s/n, 48940 Leioa, Bizkaia Spain
| | - Adrián Quindimil
- Department of Chemical Engineering, Faculty of Science and Technology, University of the Basque Country UPV/EHU, Barrio Sarriena s/n, 48940 Leioa, Bizkaia Spain
| | - Arantxa Davó-Quiñonero
- Department of Inorganic Chemistry, University of Alicante, Carretera de San Vicente s/n, 03080 Alicante, Spain
| | - Alejandro Bermejo-López
- Department of Chemical Engineering, Faculty of Science and Technology, University of the Basque Country UPV/EHU, Barrio Sarriena s/n, 48940 Leioa, Bizkaia Spain
| | - Esther Bailón-García
- Department of Inorganic Chemistry, University of Alicante, Carretera de San Vicente s/n, 03080 Alicante, Spain
| | - Beñat Pereda-Ayo
- Department of Chemical Engineering, Faculty of Science and Technology, University of the Basque Country UPV/EHU, Barrio Sarriena s/n, 48940 Leioa, Bizkaia Spain
| | - Dolores Lozano-Castelló
- Department of Inorganic Chemistry, University of Alicante, Carretera de San Vicente s/n, 03080 Alicante, Spain
| | - José A. González-Marcos
- Department of Chemical Engineering, Faculty of Science and Technology, University of the Basque Country UPV/EHU, Barrio Sarriena s/n, 48940 Leioa, Bizkaia Spain
| | - Agustín Bueno-López
- Department of Inorganic Chemistry, University of Alicante, Carretera de San Vicente s/n, 03080 Alicante, Spain
| | - Juan R. González-Velasco
- Department of Chemical Engineering, Faculty of Science and Technology, University of the Basque Country UPV/EHU, Barrio Sarriena s/n, 48940 Leioa, Bizkaia Spain
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12
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López-Rodríguez S, Davó-Quiñonero A, Bailón-García E, Lozano-Castelló D, Villar-Garcia IJ, Dieste VP, Calvo JAO, Velasco JRG, Bueno-López A. Monitoring by in situ NAP-XPS of active sites for CO2 methanation on a Ni/CeO2 catalyst. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.101980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Quindimil A, Onrubia-Calvo JA, Davó-Quiñonero A, Bermejo-López A, Bailón-García E, Pereda-Ayo B, Lozano-Castelló D, González-Marcos JA, Bueno-López A, González-Velasco JR. Intrinsic kinetics of CO2 methanation on low-loaded Ni/Al2O3 catalyst: Mechanism, model discrimination and parameter estimation. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.101888] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Cárdenas-Arenas A, Bailón-García E, Lozano-Castelló D, Da Costa P, Bueno-López A. Stable NiO–CeO2 nanoparticles with improved carbon resistance for methane dry reforming. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2020.11.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Castelo-Quibén J, Bailón-García E, Moral-Rodríguez AI, Carrasco-Marín F, Pérez-Cadenas AF. Recycling and valorization of LDPE: direct transformation into highly ordered doped-carbon materials and their application as electro-catalysts for the oxygen reduction reaction. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02082j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A transformation of LDPE in highly ordered doped-carbon materials by a simple one-step pyrolysis in presence of transition metal precursors is proposed. The graphitization, metal dispersion and CNFs presence are key factors for the high ORR performance.
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Affiliation(s)
- J. Castelo-Quibén
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
| | - E. Bailón-García
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
| | - A. I. Moral-Rodríguez
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
| | - F. Carrasco-Marín
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
| | - A. F. Pérez-Cadenas
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
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16
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Briz-Amate T, Castelo-Quibén J, Bailón-García E, Abdelwahab A, Carrasco-Marín F, Pérez-Cadenas AF. Growing Tungsten Nanophases on Carbon Spheres Doped with Nitrogen. Behaviour as Electro-Catalysts for Oxygen Reduction Reaction. Materials (Basel) 2021; 14:7716. [PMID: 34947310 PMCID: PMC8708835 DOI: 10.3390/ma14247716] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 12/08/2021] [Accepted: 12/09/2021] [Indexed: 11/16/2022]
Abstract
This work shows the preparation of carbon nanospheres with a high superficial nitrogen content (7 wt.%), obtained by a simple hydrothermal method, from pyrocatechol and formaldehyde, around which tungsten nanophases have been formed. One of these nanophases is tungsten carbide, whose electro-catalytic behavior in the ORR has been evaluated together with the presence of nitrogen surface groups. Both current and potential kinetic density values improve considerably with the presence of tungsten, despite the significant nitrogen loss detected during the carbonization treatment. However, the synergetic effect that the WC has with other electro-catalytic metals in this reaction cannot be easily evaluated with the nitrogen in these materials, since both contents vary in opposite ways. Nevertheless, all the prepared materials carried out oxygen electro-reduction by a mixed pathway of two and four electrons, showing remarkable electro-catalytic behavior.
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Affiliation(s)
- Teresa Briz-Amate
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avenida de Fuente Nueva s/n, 18071 Granada, Spain; (T.B.-A.); (J.C.-Q.); (F.C.-M.); (A.F.P.-C.)
| | - Jesica Castelo-Quibén
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avenida de Fuente Nueva s/n, 18071 Granada, Spain; (T.B.-A.); (J.C.-Q.); (F.C.-M.); (A.F.P.-C.)
| | - Esther Bailón-García
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avenida de Fuente Nueva s/n, 18071 Granada, Spain; (T.B.-A.); (J.C.-Q.); (F.C.-M.); (A.F.P.-C.)
- Unit of Excellence in Chemistry Applied to Biomedicine and the Environment, University of Granada, Avenida de Fuente Nueva s/n, 18071 Granada, Spain
| | - Abdalla Abdelwahab
- Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef 62511, Egypt;
- Faculty of Science, Galala University, Suez 43511, Egypt
| | - Francisco Carrasco-Marín
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avenida de Fuente Nueva s/n, 18071 Granada, Spain; (T.B.-A.); (J.C.-Q.); (F.C.-M.); (A.F.P.-C.)
- Unit of Excellence in Chemistry Applied to Biomedicine and the Environment, University of Granada, Avenida de Fuente Nueva s/n, 18071 Granada, Spain
| | - Agustín F. Pérez-Cadenas
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avenida de Fuente Nueva s/n, 18071 Granada, Spain; (T.B.-A.); (J.C.-Q.); (F.C.-M.); (A.F.P.-C.)
- Unit of Excellence in Chemistry Applied to Biomedicine and the Environment, University of Granada, Avenida de Fuente Nueva s/n, 18071 Granada, Spain
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17
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López-Rodríguez S, Davó-Quiñonero A, Bailón-García E, Lozano-Castelló D, Herrera FC, Pellegrin E, Escudero C, García-Melchor M, Bueno-López A. Elucidating the Role of the Metal Catalyst and Oxide Support in the Ru/CeO 2-Catalyzed CO 2 Methanation Mechanism. J Phys Chem C Nanomater Interfaces 2021; 125:25533-25544. [PMID: 34868445 PMCID: PMC8631708 DOI: 10.1021/acs.jpcc.1c07537] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 11/01/2021] [Indexed: 06/13/2023]
Abstract
This study addresses the yet unresolved CO2 methanation mechanism on a Ru/CeO2 catalyst by means of near-ambient-pressure X-ray photoelectron spectroscopy (NAP-XPS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) complemented with periodic density functional theory (DFT) calculations. NAP-XPS results show that the switch from H2 to CO2 + H2 mixture oxidizes both the Ru and CeO2 phases at low temperatures, which is explained by the CO2 adsorption modes assessed by means of DFT on each representative surface. CO2 adsorption on Ru is dissociative and moderately endergonic, leading to polybonded Ru-carbonyl groups whose hydrogenation is the rate-determining step in the overall process. Unlike on Ru metal, CO2 can be strongly adsorbed as carbonates on ceria surface oxygen sites or on the reduced ceria at oxygen vacancies as carboxylates (CO2 -δ), resulting in the reoxidation of ceria. Carboxylates can then evolve as CO, which is released either via direct splitting at relatively low temperatures or through stable formate species at higher temperatures. DRIFTS confirm the great stability of formates, whose depletion relates with CO2 conversion in the reaction cell, while carbonates remain on the surface up to higher temperatures. CO generation on ceria serves as an additional reservoir of Ru-carbonyls, cooperating to the overall CO2 methanation process. Altogether, this study highlights the noninnocent role of the ceria support in the performance of Ru/CeO2 toward CO2 methanation.
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Affiliation(s)
- Sergio López-Rodríguez
- Departamento
de Química Inorgánica, Universidad
de Alicante, Carretera San Vicente del Raspeig s/n, E-03080 Alicante, Spain
| | - Arantxa Davó-Quiñonero
- Departamento
de Química Inorgánica, Universidad
de Alicante, Carretera San Vicente del Raspeig s/n, E-03080 Alicante, Spain
- School
of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2, Ireland
| | - Esther Bailón-García
- Departamento
de Química Inorgánica, Universidad
de Alicante, Carretera San Vicente del Raspeig s/n, E-03080 Alicante, Spain
| | - Dolores Lozano-Castelló
- Departamento
de Química Inorgánica, Universidad
de Alicante, Carretera San Vicente del Raspeig s/n, E-03080 Alicante, Spain
| | - Facundo C. Herrera
- ALBA
Synchrotron Light Source, Carrer de la Llum 2-26, Cerdanyola del Vallès, 08290 Barcelona, Spain
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA, CONICET), Departamento de Química, Facultad de Ciencias
Exactas, Universidad Nacional de La Plata, Diagonal 113 y 64, 1900 La Plata, Argentina
| | - Eric Pellegrin
- ALBA
Synchrotron Light Source, Carrer de la Llum 2-26, Cerdanyola del Vallès, 08290 Barcelona, Spain
| | - Carlos Escudero
- ALBA
Synchrotron Light Source, Carrer de la Llum 2-26, Cerdanyola del Vallès, 08290 Barcelona, Spain
| | - Max García-Melchor
- School
of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2, Ireland
| | - Agustín Bueno-López
- Departamento
de Química Inorgánica, Universidad
de Alicante, Carretera San Vicente del Raspeig s/n, E-03080 Alicante, Spain
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18
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Indekeu A, Bailón-García E, Fernandes A, Baltazar R, Ferraria AM, do Rego AMB, Filipa Ribeiro M. Synthesis of modified TiO2-based catalysts for the photocatalytic production of solar fuels from synthesis gas. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.07.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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19
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Benjedim S, Romero-Cano LA, Hamad H, Bailón-García E, Slovák V, Carrasco-Marín F, Pérez-Cadenas AF. Synthesis of Magnetic Adsorbents Based Carbon Highly Efficient and Stable for Use in the Removal of Pb(II) and Cd(II) in Aqueous Solution. Materials (Basel) 2021; 14:ma14206134. [PMID: 34683725 PMCID: PMC8539804 DOI: 10.3390/ma14206134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 08/30/2021] [Accepted: 10/12/2021] [Indexed: 11/30/2022]
Abstract
In this study, two alternative synthesis routes for magnetic adsorbents were evaluated to remove Pb(II) and Cd(II) in an aqueous solution. First, activated carbon was prepared from argan shells (C). One portion was doped with magnetite (Fe3O4+C) and the other with cobalt ferrite (CoFe2O4+C). Characterization studies showed that C has a high surface area (1635 m2 g−1) due to the development of microporosity. For Fe3O4+C the magnetic particles were nano-sized and penetrated the material’s texture, saturating the micropores. In contrast, CoFe2O4+C conserves the mesoporosity developed because most of the cobalt ferrite particles adhered to the exposed surface of the material. The adsorption capacity for Pb(II) was 389 mg g−1 (1.88 mmol g−1) and 249 mg g−1 (1.20 mmol g−1); while for Cd(II) was 269 mg g−1 (2.39 mmol g−1) and 264 mg g−1 (2.35 mmol g−1) for the Fe3O4+C and CoFe2O4+C, respectively. The predominant adsorption mechanism is the interaction between -FeOH groups with the cations in the solution, which are the main reason these adsorption capacities remain high in repeated adsorption cycles after regeneration with HNO3. The results obtained are superior to studies previously reported in the literature, making these new materials a promising alternative for large-scale wastewater treatment processes using batch-type reactors.
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Affiliation(s)
- Safa Benjedim
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Av. Fuente Nueva s/n., 18071 Granada, Spain; (S.B.); (H.H.); (E.B.-G.); (F.C.-M.)
| | - Luis A. Romero-Cano
- Grupo de Investigación en Materiales y Fenómenos de Superficie, Departamento de Ciencias Biotecnológicas y Ambientales, Universidad Autónoma de Guadalajara, Av. Patria 1201, Zapopan 45129, Mexico
- Correspondence: (L.A.R.-C.); (A.F.P.-C.)
| | - Hesham Hamad
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Av. Fuente Nueva s/n., 18071 Granada, Spain; (S.B.); (H.H.); (E.B.-G.); (F.C.-M.)
- Fabrication Technology Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technology Application (SRTA-City), Alexandria 21934, Egypt
| | - Esther Bailón-García
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Av. Fuente Nueva s/n., 18071 Granada, Spain; (S.B.); (H.H.); (E.B.-G.); (F.C.-M.)
| | - Václav Slovák
- Department of Chemistry, Faculty of Science, University of Ostrava, 30, dubna 22, 702 00 Ostrava, Czech Republic;
| | - Francisco Carrasco-Marín
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Av. Fuente Nueva s/n., 18071 Granada, Spain; (S.B.); (H.H.); (E.B.-G.); (F.C.-M.)
| | - Agustín F. Pérez-Cadenas
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Av. Fuente Nueva s/n., 18071 Granada, Spain; (S.B.); (H.H.); (E.B.-G.); (F.C.-M.)
- Correspondence: (L.A.R.-C.); (A.F.P.-C.)
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López-Rodríguez S, Davó-Quiñonero A, Bailón-García E, Lozano-Castelló D, Bueno-López A. Effect of Ru loading on Ru/CeO2 catalysts for CO2 methanation. Molecular Catalysis 2021. [DOI: 10.1016/j.mcat.2021.111911] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Aguilar-Madera CG, Ocampo-Pérez R, Bailón-García E, Herrera-Hernández EC, Chaparro-Garnica CY, Davó-Quiñonero A, Lozano-Castelló D, Bueno-López A, García-Hernández E. Mathematical Modeling of Preferential CO Oxidation Reactions under Advection–Diffusion Conditions in a 3D-Printed Reactive Monolith. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Carlos G. Aguilar-Madera
- Facultad de Ciencias de la Tierra, Universidad Autónoma de Nuevo León, Carretera a Cerro Prieto Km. 8 Ex Hacienda de Guadalupe, C.P. 67700 Linares, México
| | - Raúl Ocampo-Pérez
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, Zona Universitaria, C.P. 78210 San Luis Potosí, México
| | - Esther Bailón-García
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente s/n, C.P. E03080 Alicante, España
| | - E. C. Herrera-Hernández
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, Zona Universitaria, C.P. 78210 San Luis Potosí, México
| | - Cristian Y. Chaparro-Garnica
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente s/n, C.P. E03080 Alicante, España
| | - Arantxa Davó-Quiñonero
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Z.C. D02, Dublin 2, Ireland
| | - Dolores Lozano-Castelló
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente s/n, C.P. E03080 Alicante, España
| | - Agustín Bueno-López
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente s/n, C.P. E03080 Alicante, España
| | - Elías García-Hernández
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, Zona Universitaria, C.P. 78210 San Luis Potosí, México
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22
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Rodríguez SL, Davó-Quiñonero A, Juan-Juan J, Bailón-García E, Lozano-Castelló D, Bueno-López A. Effect of Pr in CO 2 Methanation Ru/CeO 2 Catalysts. J Phys Chem C Nanomater Interfaces 2021; 125:12038-12049. [PMID: 34630817 PMCID: PMC8494384 DOI: 10.1021/acs.jpcc.1c03539] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/18/2021] [Indexed: 06/13/2023]
Abstract
CO2 methanation has been studied with Pr-doped Ru/CeO2 catalysts, and a dual effect of Pr has been observed. For low Pr content (i.e., 3 wt %) a positive effect in oxygen mobility prevails, while for high Pr doping (i.e., 25 wt %) a negative effect in the Ru-CeO2 interaction is more relevant. Isotopic experiments evidenced that Pr hinders the dissociation of CO2, which takes place at the Ru-CeO2 interface. However, once the temperature is high enough (200 °C), Pr improves the oxygen mobility in the CeO2 support, and this enhances CO2 dissociation because the oxygen atoms left are delivered faster to the support sink and the dissociation sites at the interface are cleaned up faster. In situ Raman spectroscopy experiments confirmed that Pr improves the creation of oxygen vacancies on the ceria lattice but hinders their reoxidation by CO2, and both opposite effects reach an optimum balance for 3 wt % Pr doping. In addition, in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) experiments showed that Pr doping, regardless of the amount, decreases the population of surface carbon species created on the catalysts surface upon CO2 chemisorption under methanation reaction conditions, affecting both productive reaction intermediates (formates and carbonyls) and unproductive carbonates.
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Affiliation(s)
- Sergio López Rodríguez
- Inorganic Chemistry Department, University of Alicante, Carrertera de San Vicente del Raspeig s/n, E-03080 Alicante, Spain
| | - Arantxa Davó-Quiñonero
- Inorganic Chemistry Department, University of Alicante, Carrertera de San Vicente del Raspeig s/n, E-03080 Alicante, Spain
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2, Dublin, Ireland
| | - Jerónimo Juan-Juan
- Technical Research Services (SSTTI), University of Alicante, Carretera de San Vicente del Raspeig s/n, E-03080 Alicante, Spain
| | - Esther Bailón-García
- Inorganic Chemistry Department, University of Alicante, Carrertera de San Vicente del Raspeig s/n, E-03080 Alicante, Spain
| | - Dolores Lozano-Castelló
- Inorganic Chemistry Department, University of Alicante, Carrertera de San Vicente del Raspeig s/n, E-03080 Alicante, Spain
| | - Agustín Bueno-López
- Inorganic Chemistry Department, University of Alicante, Carrertera de San Vicente del Raspeig s/n, E-03080 Alicante, Spain
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Davó-Quiñonero A, López-Rodríguez S, Bailón-García E, Lozano-Castelló D, Bueno-López A. Mineral Manganese Oxides as Oxidation Catalysts: Capabilities in the CO-PROX Reaction. ACS Sustain Chem Eng 2021; 9:6329-6336. [PMID: 34567850 PMCID: PMC8461565 DOI: 10.1021/acssuschemeng.1c00343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 04/01/2021] [Indexed: 06/13/2023]
Abstract
Cryptomelane is an abundant mineral manganese oxide with unique physicochemical features. This work investigates the real capabilities of cryptomelane as an oxidation catalyst. In particular, the preferential CO oxidation (CO-PROX), has been studied as a simple reaction model. When doped with copper, the cryptomelane-based material has revealed a great potential, displaying a comparable activity to the high-performance CuO/CeO2. Despite stability concerns that compromise the primary catalyst reusability, CuO/cryptomelane is particularly robust in the presence of CO2 and H2O, typical components of realistic CO-PROX streams. The CO-PROX reaction mechanism has been assessed by means of isotopic oxygen pulse experiments. Altogether, CuO/CeO2 shows a greater oxygen lability, which facilitates lattice oxygen enrolment in the CO-PROX mechanism. In the case of CuO/cryptomelane, in spite of its lower oxygen mobility, the intrinsic structural water co-assists as active oxygen species involved in CO-PROX. Thus, the presence of moisture in the reaction stream turns out to be beneficial for the stability of the cryptomelane structure, besides aiding into the active oxygen restitution in the catalyst. Overall, this study proves that CuO/cryptomelane is a promising competitor to CuO/CeO2 in CO-PROX technology, whose implementation can bring the CO-PROX technology and H2 purification processes a more sustainable nature.
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Chaparro-Garnica CY, Bailón-García E, Lozano-Castelló D, Bueno-López A. Design and fabrication of integral carbon monoliths combining 3D printing and sol–gel polymerization: effects of the channel morphology on the CO-PROX reaction. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01104a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new method to synthesize integral carbon monoliths with a controlled channel morphology has been developed in this work by combining 3D-printing technology and sol–gel polymerization.
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Affiliation(s)
- Cristian Yesid Chaparro-Garnica
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente del Raspeig s/n, E03080, Alicante, Spain
| | - Esther Bailón-García
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente del Raspeig s/n, E03080, Alicante, Spain
| | - Dolores Lozano-Castelló
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente del Raspeig s/n, E03080, Alicante, Spain
| | - Agustín Bueno-López
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente del Raspeig s/n, E03080, Alicante, Spain
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García-Hernández E, Aguilar-Madera C, Herrera-Hernández E, Ocampo-Pérez R, Bailón-García E, Cortés FB. Hydrodynamic effects on the overall adsorption rate of phenol on activated carbon cloth through the advection-diffusion model application. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2020.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Chaparro-Garnica CY, Jordá-Faus P, Bailón-García E, Ocampo-Pérez R, Aguilar-Madera CG, Davó-Quiñonero A, Lozano-Castelló D, Bueno-López A. Customizable Heterogeneous Catalysts: Nonchanneled Advanced Monolithic Supports Manufactured by 3D-Printing for Improved Active Phase Coating Performance. ACS Appl Mater Interfaces 2020; 12:54573-54584. [PMID: 33256401 DOI: 10.1021/acsami.0c14703] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Three-dimensional (3D)-printed catalysts are being increasingly studied; however, most of these studies focus on the obtention of catalytically active monoliths, and thus traditional channeled monolithic catalysts are usually obtained and tested, losing sight of the advantages that 3D-printing could entail. This work goes one step further, and an advanced monolith with specifically designed geometry has been obtained, taking advantage of the versatility provided by 3D-printing. As a proof of concept, nonchanneled advanced monolithic (NCM) support, composed of several transversal discs containing deposits for active phase deposition and slits through which the gas circulates, was obtained and tested in the CO-PrOx reaction. The results evidenced that the NCM support showed superior catalytic performance compared to conventional channeled monoliths (CMs). The region of temperature in which the active phase can work under chemical control, and thus in a more efficient way, is increased by 31% in NCM compared to the powdered or the CM sample. Turbulence occurs inside the fluid path through the NCM, which enhances the mass transfer of reagents and products toward and from the active sites to the fluid bulk favoring the chemical reaction rate. The nonchanneled monolith also improved heat dispersion by the tortuous paths, reducing the local temperature at the active site. Thus, the way in which reactants and products are transported inside the monoliths plays a crucial role, and this is affected by the inner geometry of the monoliths.
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Affiliation(s)
- Cristian Y Chaparro-Garnica
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente del Raspeig s/n, E03080 Alicante, España
| | - Pepe Jordá-Faus
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente del Raspeig s/n, E03080 Alicante, España
| | - Esther Bailón-García
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente del Raspeig s/n, E03080 Alicante, España
| | - Raúl Ocampo-Pérez
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, Zona Universitaria, 78210 San Luis Potosí, México
| | - Carlos G Aguilar-Madera
- Facultad de Ciencias de la Tierra, Universidad Autónoma de Nuevo León, Carretera a Cerro Prieto Km 8, Ex-Hacienda de Guadalupe, 67700 Linares, México
| | - Arantxa Davó-Quiñonero
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente del Raspeig s/n, E03080 Alicante, España
| | - Dolores Lozano-Castelló
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente del Raspeig s/n, E03080 Alicante, España
| | - Agustín Bueno-López
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera de San Vicente del Raspeig s/n, E03080 Alicante, España
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Quindimil A, De-La-Torre U, Pereda-Ayo B, Davó-Quiñonero A, Bailón-García E, Lozano-Castelló D, González-Marcos JA, Bueno-López A, González-Velasco JR. Effect of metal loading on the CO2 methanation: A comparison between alumina supported Ni and Ru catalysts. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.06.027] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Davó-Quiñonero A, Bailón-García E, López-Rodríguez S, Juan-Juan J, Lozano-Castelló D, García-Melchor M, Herrera FC, Pellegrin E, Escudero C, Bueno-López A. Insights into the Oxygen Vacancy Filling Mechanism in CuO/CeO2 Catalysts: A Key Step Toward High Selectivity in Preferential CO Oxidation. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00648] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Arantxa Davó-Quiñonero
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera San Vicente del Raspeig s/n E-03080, Alicante, Spain
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2, Dublin, Ireland
| | - Esther Bailón-García
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera San Vicente del Raspeig s/n E-03080, Alicante, Spain
| | - Sergio López-Rodríguez
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera San Vicente del Raspeig s/n E-03080, Alicante, Spain
| | - Jerónimo Juan-Juan
- Servicios Técnicos de Investigación, Universidad de Alicante, Carretera San Vicente del Raspeig s/n E-03080, Alicante, Spain
| | - Dolores Lozano-Castelló
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera San Vicente del Raspeig s/n E-03080, Alicante, Spain
| | - Max García-Melchor
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2, Dublin, Ireland
| | - Facundo C. Herrera
- ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290 Cerdanyola del Vallès, Barcelona, Spain
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA, CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Diagonal 113 y 64, 1900 La Plata, Argentina
| | - Eric Pellegrin
- ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290 Cerdanyola del Vallès, Barcelona, Spain
| | - Carlos Escudero
- ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290 Cerdanyola del Vallès, Barcelona, Spain
| | - Agustín Bueno-López
- Departamento de Química Inorgánica, Universidad de Alicante, Carretera San Vicente del Raspeig s/n E-03080, Alicante, Spain
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Hamad H, Bailón-García E, Morales-Torres S, Carrasco-Marín F, Pérez-Cadenas AF, Maldonado-Hódar FJ. Functionalized Cellulose for the Controlled Synthesis of Novel Carbon-Ti Nanocomposites: Physicochemical and Photocatalytic Properties. Nanomaterials (Basel) 2020; 10:E729. [PMID: 32290411 PMCID: PMC7221653 DOI: 10.3390/nano10040729] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 04/07/2020] [Accepted: 04/07/2020] [Indexed: 11/16/2022]
Abstract
Carbon-Ti nanocomposites were prepared by a controlled two-step method using microcrystalline cellulose as a raw material. The synthesis procedure involves the solubilization of cellulose by an acid treatment (H3PO4 or HNO3) and the impregnation with the Ti precursor followed of a carbonization step at 500 or 800 °C. The type of acid treatment leads to a different functionalization of cellulose with phosphorus- or oxygen-containing surface groups, which are able to control the load, dispersion and crystalline phase of Ti during the composite preparation. Thus, phosphorus functionalities lead to amorphous carbon-Ti composites at 500 °C, while TiP2O7 crystals are formed when prepared at 800 °C. On the contrary, oxygenated groups induce the formation of TiO2 rutile at an unusually low temperature (500 °C), while an increase of carbonization temperature promotes a progressive crystal growth. The removal of Orange G (OG) azo dye in aqueous solution, as target pollutant, was used to determine the adsorptive and photocatalytic efficiencies, with all composites being more active than the benchmark TiO2 material (Degussa P25). Carbon-Ti nanocomposites with a developed micro-mesoporosity, reduced band gap and TiO2 rutile phase were the most active in the photodegradation of OG under ultraviolet irradiation.
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Affiliation(s)
- Hesham Hamad
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avda, Fuente Nueva, s/n. ES18071 Granada, Spain; (H.H.); (E.B.-G.); (F.C.-M.); (A.F.P.-C.); (F.J.M.-H.)
- Fabrication Technology Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technology Applications (SRTA-City), New Borg El-Arab City 21934, Egypt
| | - Esther Bailón-García
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avda, Fuente Nueva, s/n. ES18071 Granada, Spain; (H.H.); (E.B.-G.); (F.C.-M.); (A.F.P.-C.); (F.J.M.-H.)
| | - Sergio Morales-Torres
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avda, Fuente Nueva, s/n. ES18071 Granada, Spain; (H.H.); (E.B.-G.); (F.C.-M.); (A.F.P.-C.); (F.J.M.-H.)
| | - Francisco Carrasco-Marín
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avda, Fuente Nueva, s/n. ES18071 Granada, Spain; (H.H.); (E.B.-G.); (F.C.-M.); (A.F.P.-C.); (F.J.M.-H.)
| | - Agustín F. Pérez-Cadenas
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avda, Fuente Nueva, s/n. ES18071 Granada, Spain; (H.H.); (E.B.-G.); (F.C.-M.); (A.F.P.-C.); (F.J.M.-H.)
| | - Francisco J. Maldonado-Hódar
- Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avda, Fuente Nueva, s/n. ES18071 Granada, Spain; (H.H.); (E.B.-G.); (F.C.-M.); (A.F.P.-C.); (F.J.M.-H.)
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Sellers-Antón B, Bailón-García E, Cardenas-Arenas A, Davó-Quiñonero A, Lozano-Castelló D, Bueno-López A. Enhancement of the Generation and Transfer of Active Oxygen in Ni/CeO 2 Catalysts for Soot Combustion by Controlling the Ni-Ceria Contact and the Three-Dimensional Structure. Environ Sci Technol 2020; 54:2439-2447. [PMID: 31944674 DOI: 10.1021/acs.est.9b07682] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The effect of the three-dimensionally ordered macroporous (3DOM) structure and the Ni doping of CeO2 on the physicochemical properties and catalytic activity for soot combustion was studied. Moreover, the way in which Ni is introduced to the ceria support was also investigated. For this, CeO2 supports were synthesized with uncontrolled (Ref) and 3DOM-structured morphology, and their respective Ni/CeO2 catalysts were prepared by impregnation of the previously synthesized supports or by successive impregnation of both precursors (Ni and Ce) on the 3DOM template. Conclusions reached in this study are: (1) the 3DOM structure increases the surface area of the catalysts and improves the catalyst-soot contact. (2) The doping of CeO2 with Ni improves the catalytic activity because the NiO participates in the catalytic oxidation of NO to NO2, and also favors the production of active oxygen and the catalyst oxygen storage capacity. (3) Ni incorporation method affects its physicochemical and catalytic properties. By introducing Ni by successive infiltration in the solid template, the CeO2 crystal size is reduced, Ni dispersion is improved, and the catalyst reducibility is increased. All of these characteristics make the catalyst synthesized by successive infiltration to have higher catalytic activity for soot combustion than the Ni-impregnated CeO2 catalyst.
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Affiliation(s)
- Begoña Sellers-Antón
- Department of Inorganic Chemistry , University of Alicante , Carretera de San Vicente s/n , E03080 Alicante , Spain
| | - Esther Bailón-García
- Department of Inorganic Chemistry , University of Alicante , Carretera de San Vicente s/n , E03080 Alicante , Spain
| | - Andrea Cardenas-Arenas
- Department of Inorganic Chemistry , University of Alicante , Carretera de San Vicente s/n , E03080 Alicante , Spain
| | - Arantxa Davó-Quiñonero
- Department of Inorganic Chemistry , University of Alicante , Carretera de San Vicente s/n , E03080 Alicante , Spain
| | - Dolores Lozano-Castelló
- Department of Inorganic Chemistry , University of Alicante , Carretera de San Vicente s/n , E03080 Alicante , Spain
| | - Agustín Bueno-López
- Department of Inorganic Chemistry , University of Alicante , Carretera de San Vicente s/n , E03080 Alicante , Spain
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Chaparro-Garnica CY, Davó-Quiñonero A, Bailón-García E, Lozano-Castelló D, Bueno-López A. Design of Monolithic Supports by 3D Printing for Its Application in the Preferential Oxidation of CO (CO-PrOx). ACS Appl Mater Interfaces 2019; 11:36763-36773. [PMID: 31535557 DOI: 10.1021/acsami.9b12731] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Honeycomb-shaped cordierite monoliths are widely used as supports for a large number of industrial applications. However, the high manufacturing cost of cordierite monoliths only justifies its use for high temperatures and aggressive chemical environments, demanding applications where the economic benefit obtained exceeds the manufacturing costs. For low demanding applications, such as the preferential oxidation of CO (CO-PrOx), alternative materials can be proposed to reduce manufacturing costs. Polymeric monoliths would be an interesting low-cost alternative; however, the limitations of the active phase incorporation to the polymeric support must be overcome. In this work, the implementation and use of polymeric monolithic structures obtained by three-dimensional printing to support CuO/CeO2 catalysts for CO-PrOx have been studied. Several approaches were used to anchor the active phase into the polymeric monoliths, such as adding inorganic materials (carbon or silica) to the polymer previous to the printing process, chemical attack with solvents of the printed resin before or during the active phase incorporation, and consecutive impregnation and modification of the channel wall design. Among those approaches, best results were obtained by the addition of silica and by channel modification. Independent of the strategy followed, a subsequent thermal treatment in N2 was required to soften the resin and favor the active phase anchoring. However, catalyst particles become embedded on the polymeric resin being not active, and thus, a final cleaning thermal treatment under air was needed to recover the active phase activity, after which the supported active phase demonstrated good catalytic activity, stability, and reusability.
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Affiliation(s)
| | - Arantxa Davó-Quiñonero
- Department of Inorganic Chemistry , University of Alicante , Carretera de San Vicente s/n , E03080 Alicante , Spain
| | - Esther Bailón-García
- Department of Inorganic Chemistry , University of Alicante , Carretera de San Vicente s/n , E03080 Alicante , Spain
| | - Dolores Lozano-Castelló
- Department of Inorganic Chemistry , University of Alicante , Carretera de San Vicente s/n , E03080 Alicante , Spain
| | - Agustín Bueno-López
- Department of Inorganic Chemistry , University of Alicante , Carretera de San Vicente s/n , E03080 Alicante , Spain
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Davó-Quiñonero A, Sorolla-Rosario D, Bailón-García E, Lozano-Castelló D, Bueno-López A. Improved asymmetrical honeycomb monolith catalyst prepared using a 3D printed template. J Hazard Mater 2019; 368:638-643. [PMID: 30731363 DOI: 10.1016/j.jhazmat.2019.01.092] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 01/16/2019] [Accepted: 01/25/2019] [Indexed: 06/09/2023]
Abstract
An improved honeycomb-like monolith with asymmetrical channels, where the channels section decrease along the monolith, was fabricated using a template prepared by 3D printing. A reference honeycomb monolith was also prepared in the same way but with conventional straight channels. Cu/Ceria active phase was loaded on these supports, and SEM-EDX, Raman spectroscopy and XRD showed that the supported active phase is similar on both monoliths. The supported catalysts were tested for CO oxidation in excess oxygen and for preferential CO oxidation in H2-rich mixtures (CO-PROX), and the catalyst with the improved support achieved higher conversions in both reactions. The supported catalyst with asymmetrical channels has two benefits with regard to the counterpart catalyst with conventional symmetrical channels: improves the reaction rate with regard to the conventional one because fits better to the equation rate, and favors the turbulent regime of gases with regard to the laminar flow that prevails in symmetrical channels.
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Affiliation(s)
- Arantxa Davó-Quiñonero
- Department of Inorganic Chemistry, University of Alicante, Carretera de San Vicente s/n, E03080, Alicante, Spain
| | - Débora Sorolla-Rosario
- Department of Inorganic Chemistry, University of Alicante, Carretera de San Vicente s/n, E03080, Alicante, Spain
| | - Esther Bailón-García
- Department of Inorganic Chemistry, University of Alicante, Carretera de San Vicente s/n, E03080, Alicante, Spain
| | - Dolores Lozano-Castelló
- Department of Inorganic Chemistry, University of Alicante, Carretera de San Vicente s/n, E03080, Alicante, Spain
| | - Agustín Bueno-López
- Department of Inorganic Chemistry, University of Alicante, Carretera de San Vicente s/n, E03080, Alicante, Spain.
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Godino-Ojer M, López-Peinado AJ, Maldonado-Hódar FJ, Bailón-García E, Pérez-Mayoral E. Cobalt oxide-carbon nanocatalysts with highly enhanced catalytic performance for the green synthesis of nitrogen heterocycles through the Friedländer condensation. Dalton Trans 2019; 48:5637-5648. [PMID: 30968087 DOI: 10.1039/c8dt04403a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel series of eco-sustainable catalysts developed by supporting CoO nanoparticles on different carbon supports, highly efficient in the synthesis of quinolines and naphthyridines, through the Friedländer condensation, are reported for the first time. Textural properties, dispersion and location of the Co-phase are influenced by the nature of the carbon support, Co-precursor salt and metal loading, having a significant impact on the catalytic performance. Thus, the presence of the mesopores and macropores in carbon aerogels together with the homogeneous distribution of the active phase favours the formation of product 3a as a function of the metal loading. However, an increase in the metal content when using CNTs indicates the formation of CoO aggregates and an optimal concentration of 3 wt% CoO was observed, providing the highest conversion values. The carbon-based catalysts herein reported can be considered to be a sustainable alternative having advantages such as easy preparation, superior stability and notably enhanced catalytic performance, operating at lower temperature and under solvent-free conditions.
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Affiliation(s)
- Marina Godino-Ojer
- Departamento de Química Inorgánica y Química Técnica, Universidad Nacional de Educación a Distancia, UNED, Paseo Senda del Rey 9, Facultad de Ciencias, 28040, Madrid, Spain.
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Alcalde-Santiago V, Bailón-García E, Davó-Quiñonero A, Lozano-Castelló D, Bueno-López A. PrOx catalysts for the combustion of soot generated in diesel engines: effect of CuO and 3DOM structures. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00130a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
PrOx and CuO/PrOx catalysts have been prepared with conventional (Ref) and three dimensionally ordered macroporous (3DOM) structures, and the effect of the structure on soot combustion has been studied.
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Bailón-García E, Maldonado-Hódar FJ, Carrasco-Marín F, Pérez-Cadenas AF. Fitting the experimental conditions and characteristics of Pt/C catalyst for the selective hydrogenation of citral. CHEM ENG COMMUN 2018. [DOI: 10.1080/00986445.2018.1446425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Esther Bailón-García
- Research Group in Carbon Materials, Inorganic Chemistry Department, Faculty of Sciences, University of Granada, Granada, Spain
| | - Francisco J. Maldonado-Hódar
- Research Group in Carbon Materials, Inorganic Chemistry Department, Faculty of Sciences, University of Granada, Granada, Spain
| | - Francisco Carrasco-Marín
- Research Group in Carbon Materials, Inorganic Chemistry Department, Faculty of Sciences, University of Granada, Granada, Spain
| | - Agustín F. Pérez-Cadenas
- Research Group in Carbon Materials, Inorganic Chemistry Department, Faculty of Sciences, University of Granada, Granada, Spain
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López-Ramón MV, Álvarez MA, Moreno-Castilla C, Fontecha-Cámara MA, Yebra-Rodríguez Á, Bailón-García E. Effect of calcination temperature of a copper ferrite synthesized by a sol-gel method on its structural characteristics and performance as Fenton catalyst to remove gallic acid from water. J Colloid Interface Sci 2018; 511:193-202. [DOI: 10.1016/j.jcis.2017.09.117] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 09/25/2017] [Accepted: 09/30/2017] [Indexed: 11/28/2022]
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Elmouwahidi A, Bailón-García E, Pérez-Cadenas AF, Maldonado-Hódar FJ, Castelo-Quibén J, Carrasco-Marín F. Electrochemical performances of supercapacitors from carbon-ZrO2 composites. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2017.11.041] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Elmouwahidi A, Bailón-García E, Pérez-Cadenas AF, Maldonado-Hódar FJ, Carrasco-Marín F. Activated carbons from KOH and H 3 PO 4 -activation of olive residues and its application as supercapacitor electrodes. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.01.152] [Citation(s) in RCA: 165] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bailón-García E, Carrasco-Marín F, Pérez-Cadenas AF, Maldonado-Hódar FJ. Chemoselective Pt-catalysts supported on carbon-TiO2 composites for the direct hydrogenation of citral to unsaturated alcohols. J Catal 2016. [DOI: 10.1016/j.jcat.2016.09.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Vivo-Vilches JF, Bailón-García E, Pérez-Cadenas AF, Carrasco-Marín F, Maldonado-Hódar FJ. Tailoring activated carbons for the development of specific adsorbents of gasoline vapors. J Hazard Mater 2013; 263 Pt 2:533-540. [PMID: 24239258 DOI: 10.1016/j.jhazmat.2013.10.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 10/03/2013] [Accepted: 10/05/2013] [Indexed: 06/02/2023]
Abstract
The specific adsorption of oxygenated and aliphatic gasoline components onto activated carbons (ACs) was studied under static and dynamic conditions. Ethanol and n-octane were selected as target molecules. A highly porous activated carbon (CA) was prepared by means of two processes: carbonization and chemical activation of olive stone residues. Different types of oxygenated groups, identified and quantified by TPD and XPS, were generated on the CA surface using an oxidation treatment with ammonium peroxydisulfate and then selectively removed by thermal treatments, as confirmed by TPD results. Chemical and porous transformations were carefully analyzed throughout these processes and related to their VOC removal performance. The analysis of the adsorption process under static conditions and the thermal desorption of VOCs enabled us to determine the total adsorption capacity and regeneration possibilities. Breakthrough curves obtained for the adsorption process carried out under dynamic conditions provided information about the mass transfer zone in each adsorption bed. While n-octane adsorption is mainly determined by the porosity of activated carbons, ethanol adsorption is related to their surface chemistry, and in particular is enhanced by the presence of carboxylic acid groups.
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Affiliation(s)
- J F Vivo-Vilches
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
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