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González-Arias J, Torres-Sempere G, Arroyo-Torralvo F, Reina TR, Odriozola JA. Optimizing biogas methanation over nickel supported on ceria-alumina catalyst: Towards CO 2-rich biomass utilization for a negative emissions society. Environ Res 2024; 242:117735. [PMID: 38000630 DOI: 10.1016/j.envres.2023.117735] [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: 08/23/2023] [Revised: 11/11/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023]
Abstract
Biogas methanation emerges as a prominent technology for converting biogas into biomethane in a single step. Furthermore, this technology can be implemented at biogas plant locations, supporting local economies and reducing dependence on large energy producers. However, there is a lack of comprehensive studies on biogas methanation, particularly regarding the technical optimization of operational parameters and the profitability analysis of the overall process. To address this gap, our study represents a seminal work on the technical optimization of biogas methanation obtaining an empirical model to predict the performance of biogas methanation. We investigate the influence of operational parameters, such as reaction temperature, H2/CO2 ratio, space velocity, and CO2 share in the biogas stream through an experimental design. Based on previous research we selected a nickel supported on ceria-alumina catalyst; being nickel a benchmark system for methanation process such selection permits a reliable data extrapolation to commercial units. We showcase the remarkable impact of studied key operation parameters, being the temperature, the most critical factor affecting the reaction performance (ca. 2 to 5 times higher than the second most influencing parameter). The impact of the H2/CO2 ratio is also noticeable. The response surfaces and contour maps suggest that a temperature between 350 and 450 °C and an H2/CO2 ratio between 2.5 and 3.2 optimize the reaction performance. Further experimental tests were performed for model validation and optimization leading to a reliable predictive model. Overall, this study provides validated equations for technology scaling-up and techno-economic analysis, thus representing a step ahead towards real-world applications for bio-methane production.
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Affiliation(s)
- J González-Arias
- Inorganic Chemistry Department and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain.
| | - G Torres-Sempere
- Inorganic Chemistry Department and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain
| | - F Arroyo-Torralvo
- Chemical and Environmental Engineering Department, Technical School of Engineering, University of Seville, C/ Camino de los Descubrimientos s/n, Sevilla, 41092, Spain
| | - T R Reina
- Inorganic Chemistry Department and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain
| | - J A Odriozola
- Inorganic Chemistry Department and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain
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2
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Villora-Picó JJ, González-Arias J, Pastor-Pérez L, Odriozola JA, Reina TR. A review on high-pressure heterogeneous catalytic processes for gas-phase CO 2 valorization. Environ Res 2024; 240:117520. [PMID: 37923108 DOI: 10.1016/j.envres.2023.117520] [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: 07/27/2023] [Revised: 10/23/2023] [Accepted: 10/25/2023] [Indexed: 11/07/2023]
Abstract
This review discusses the importance of mitigating CO2 emissions by valorizing CO2 through high-pressure catalytic processes. It focuses on various key processes, including CO2 methanation, reverse water-gas shift, methane dry reforming, methanol, and dimethyl ether synthesis, emphasizing pros and cons of high-pressure operation. CO2 methanation, methanol synthesis, and dimethyl ether synthesis reactions are thermodynamically favored under high-pressure conditions. However, in the case of methane dry reforming and reverse water-gas shift, applying high pressure, results in decreased selectivity toward desired products and an increase in coke production, which can be detrimental to both the catalyst and the reaction system. Nevertheless, high-pressure utilization proves industrially advantageous for cost reduction when these processes are integrated with Fischer-Tropsch or methanol synthesis units. This review also compiles recent advances in heterogeneous catalysts design for high-pressure applications. By examining the impact of pressure on CO2 valorization and the state of the art, this work contributes to improving scientific understanding and optimizing these processes for sustainable CO2 management, as well as addressing challenges in high-pressure CO2 valorization that are crucial for industrial scaling-up. This includes the development of cost-effective and robust reactor materials and the development of low-cost catalysts that yield improved selectivity and long-term stability under realistic working environments.
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Affiliation(s)
- J J Villora-Picó
- Inorganic Chemistry Department and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain.
| | - J González-Arias
- Inorganic Chemistry Department and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain
| | - L Pastor-Pérez
- Inorganic Chemistry Department and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain
| | - J A Odriozola
- Inorganic Chemistry Department and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain
| | - T R Reina
- Inorganic Chemistry Department and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain
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3
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Santos JL, Centeno MA, Odriozola JA. Biochar production from cellulose under reductant atmosphere: influence of the total pyrolysis time. RSC Adv 2023; 13:21071-21079. [PMID: 37448636 PMCID: PMC10336644 DOI: 10.1039/d3ra03093h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 06/08/2023] [Indexed: 07/15/2023] Open
Abstract
Today's rising energy costs, coupled with increasing energy demand, make it necessary to search for more efficient energy processes. In recent years, there have been increasing efforts to develop efficient catalysts based on waste-derived char, by a single step where the carbon precursor and the metallic active phase one undergo a single common thermal process under a reductant atmosphere at high temperature. The use of a reductant atmosphere drives the formation of carbonaceous materials with different characteristics than those obtained under the standard nitrogen-inert one. Our work evaluates the influence of the residence time and the heating rate on the physicochemical properties of the biochar obtained. Relatively long residence times and slow heating rates, improve the yield to the resulting biochar, without increasing production cost, making the subsequent char-based metallic catalyst synthesis more efficient. The heating rate was shown to be key in improving the properties of the char in a smoother and more controlled way, unlocking a new working pathway for the efficient design and production of char-based catalysts in a one-pot synthesis.
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Affiliation(s)
- J L Santos
- Instituto de Ciencias de Materiales de Sevilla, Centro Mixto CSIC-Universidad de Sevilla Avda, Américo Vespucio 49 41092 Seville Spain
| | - M A Centeno
- Instituto de Ciencias de Materiales de Sevilla, Centro Mixto CSIC-Universidad de Sevilla Avda, Américo Vespucio 49 41092 Seville Spain
| | - J A Odriozola
- Instituto de Ciencias de Materiales de Sevilla, Centro Mixto CSIC-Universidad de Sevilla Avda, Américo Vespucio 49 41092 Seville Spain
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4
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Gandara-Loe J, Portillo E, Odriozola JA, Reina TR, Pastor-Pérez L. K-Promoted Ni-Based Catalysts for Gas-Phase CO 2 Conversion: Catalysts Design and Process Modelling Validation. Front Chem 2021; 9:785571. [PMID: 34869232 PMCID: PMC8636742 DOI: 10.3389/fchem.2021.785571] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 10/27/2021] [Indexed: 11/24/2022] Open
Abstract
The exponential growth of greenhouse gas emissions and their associated climate change problems have motivated the development of strategies to reduce CO2 levels via CO2 capture and conversion. Reverse water gas shift (RWGS) reaction has been targeted as a promising pathway to convert CO2 into syngas which is the primary reactive in several reactions to obtain high-value chemicals. Among the different catalysts reported for RWGS, the nickel-based catalyst has been proposed as an alternative to the expensive noble metal catalyst. However, Ni-based catalysts tend to be less active in RWGS reaction conditions due to preference to CO2 methanation reaction and to the sintering and coke formation. Due to this, the aim of this work is to study the effect of the potassium (K) in Ni/CeO2 catalyst seeking the optimal catalyst for low-temperature RWGS reaction. We synthesised Ni-based catalyst with different amounts of K:Ni ratio (0.5:10, 1:10, and 2:10) and fully characterised using different physicochemical techniques where was observed the modification on the surface characteristics as a function of the amount of K. Furthermore, it was observed an improvement in the CO selectivity at a lower temperature as a result of the K-Ni-support interactions but also a decrease on the CO2 conversion. The 1K catalyst presented the best compromise between CO2 conversion, suppression of CO2 methanation and enhancing CO selectivity. Finally, the experimental results were contrasted with the trends obtained from the thermodynamics process modelling observing that the result follows in good agreement with the modelling trends giving evidence of the promising behaviour of the designed catalysts in CO2 high-scale units.
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Affiliation(s)
- J Gandara-Loe
- Department of Inorganic Chemistry and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain
| | - E Portillo
- Chemical and Environmental Engineering Department, School of Engineering, University of Seville, Sevilla, Spain
| | - J A Odriozola
- Department of Inorganic Chemistry and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain.,Department of Chemical and Process Engineering, University of Surrey, Guildford, United Kingdom
| | - T R Reina
- Department of Inorganic Chemistry and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain.,Department of Chemical and Process Engineering, University of Surrey, Guildford, United Kingdom
| | - L Pastor-Pérez
- Department of Inorganic Chemistry and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain.,Department of Chemical and Process Engineering, University of Surrey, Guildford, United Kingdom
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5
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Gandara-Loe J, Pastor-Perez L, Bobadilla LF, Odriozola JA, Reina TR. Understanding the opportunities of metal–organic frameworks (MOFs) for CO2 capture and gas-phase CO2 conversion processes: a comprehensive overview. REACT CHEM ENG 2021. [DOI: 10.1039/d1re00034a] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The rapid increase in the concentration of atmospheric carbon dioxide is one of the most pressing problems facing our planet.
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Affiliation(s)
- J. Gandara-Loe
- Department of Inorganic Chemistry
- University of Seville
- Seville
- Spain
| | - L. Pastor-Perez
- Department of Inorganic Chemistry
- University of Seville
- Seville
- Spain
- Chemical & Process Engineering Department
| | - L. F. Bobadilla
- Department of Inorganic Chemistry
- University of Seville
- Seville
- Spain
| | - J. A. Odriozola
- Department of Inorganic Chemistry
- University of Seville
- Seville
- Spain
- Chemical & Process Engineering Department
| | - T. R. Reina
- Department of Inorganic Chemistry
- University of Seville
- Seville
- Spain
- Chemical & Process Engineering Department
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6
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González-Castaño M, Ivanova S, Ioannides T, Centeno MA, Odriozola JA. Deep insight into Zr/Fe combination for successful Pt/CeO2/Al2O3 WGS catalyst doping. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02551j] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [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
Efficient promotion of the Pt/CeO2/Al2O3 catalytic system was achieved by the addition of two different ceria promoters, Zr and Fe.
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Affiliation(s)
- M. González-Castaño
- Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla (ICMS)
- Centro mixto CSIC-Universidad de Sevilla
- 41092 Sevilla
- Spain
| | - S. Ivanova
- Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla (ICMS)
- Centro mixto CSIC-Universidad de Sevilla
- 41092 Sevilla
- Spain
| | - T. Ioannides
- Foundation for Research and Technology-Hellas (FORTH)
- Institute of Chemical Engineering Sciences (ICE-HT)
- Patras
- Greece
| | - M. A. Centeno
- Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla (ICMS)
- Centro mixto CSIC-Universidad de Sevilla
- 41092 Sevilla
- Spain
| | - J. A. Odriozola
- Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla (ICMS)
- Centro mixto CSIC-Universidad de Sevilla
- 41092 Sevilla
- Spain
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7
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Romero-Sarria F, Plata JJ, Laguna OH, Márquez AM, Centeno MA, Sanz JF, Odriozola JA. Surface oxygen vacancies in gold based catalysts for CO oxidation. RSC Adv 2014. [DOI: 10.1039/c3ra46662k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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8
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Arzamendi G, Uriz I, Navajas A, Diéguez PM, Gandía LM, Montes M, Centeno MA, Odriozola JA. A CFD study on the effect of the characteristic dimension of catalytic wall microreactors. AIChE J 2011. [DOI: 10.1002/aic.12790] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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9
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Domínguez MI, Navarro P, Romero-Sarria F, Frías D, Cruz SA, Delgado JJ, Centeno MA, Montes M, Odriozola JA. Fibrous MnO2 nanoparticles with (2 x 2) tunnel structures. Catalytic activity in the total oxidation of volatile organic compounds. J Nanosci Nanotechnol 2009; 9:3837-3842. [PMID: 19504928 DOI: 10.1166/jnn.2009.ns76] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Manganese oxides having 2 x 2 tunnel structures (cryptomelanes) have been synthesized by a milling method in order to test their efficiency as catalysts for the abatement of volatile organic compounds, using toluene as probe molecule. These materials present excellent textural properties, arising from the nanofiber morphology and were active for toluene total oxidation. DRIFTS of the adsorbed phase allow proposing the role of lattice oxygen in the catalytic reaction.
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Affiliation(s)
- M I Domínguez
- Inorganic Chemistry Department and Instituto de Ciencia de Materiales de Sevilla, Centro Mixto US-CSIC, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
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10
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Alvarez M, López T, Odriozola JA, Gonzalez RD. Photocatalytic degradation of 2,4-dichlorophenoxyacetic acid over ZrO2, Cu/ZrO2 and Fe/ZrO2 photocatalysts synthesized by sol gel method. J Nanosci Nanotechnol 2008; 8:6414-6418. [PMID: 19205214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Photocatalytic oxidation of 2,4-dichlorophenoxyacetic acid was performed over ZrO2, Cu/ZrO2 and Fe/ZrO2 catalysts prepared by the sol-gel method. The samples were annealed at 400 degrees C. Textural and electronic characterization was carried out using BET and UV-Vis in order to establish the relationship between surface, pore volume and E(g) with the photoactivity of the materials. The degradation of the acid was followed by UV-Vis spectroscopy. The disappearance of the herbicide in solution follows approximately pseudo-first order kinetics. The apparent rate constants were calculated for the three catalysts. The results reveal that Fe/ZrO2 exhibits the best photoactivity for the degradation of 2,4-dichlorophenoxyacetic acid.
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Affiliation(s)
- M Alvarez
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, A.P 55-534, México DF, 09340 Mexico
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11
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López T, Recillas S, Guevara P, Sotelo J, Alvarez M, Odriozola JA. Pt/TiO2 brain biocompatible nanoparticles: GBM treatment using the C6 model in Wistar rats. Acta Biomater 2008; 4:2037-44. [PMID: 18640082 DOI: 10.1016/j.actbio.2008.05.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2007] [Revised: 05/08/2008] [Accepted: 05/14/2008] [Indexed: 11/29/2022]
Abstract
In the present work we synthesized inorganic oxide nanoparticle carriers of platinum compounds and tested their therapeutic effect on animal models in which C6 glioma cells have been inoculated. TiO(2)-containing Pt(NH(3))(4)Cl(2) complexes were synthesized using sol-gel methods. The platinum species are chemically bonded to the TiO(2) carrier, as shown by Fourier transform infrared spectroscopy of probe molecules. Treatment with TiO(2)-Pt nanoparticles reduces tumour growth rate by up to 56%, showing that a synergistic effect exists between the TiO(2) carrier and the platinum drug.
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Affiliation(s)
- T López
- Universidad Autónoma Metropolitana-Xochimilco, Health Department, Calzada del Hueso 1100, México DF 04960, México
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12
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Domínguez MI, Carpena J, Borschnek D, Centeno MA, Odriozola JA, Rose J. Apatite and Portland/apatite composite cements obtained using a hydrothermal method for retaining heavy metals. J Hazard Mater 2008; 150:99-108. [PMID: 17532119 DOI: 10.1016/j.jhazmat.2007.04.091] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2006] [Revised: 04/16/2007] [Accepted: 04/17/2007] [Indexed: 05/15/2023]
Abstract
Apatite and Portland/apatite composite cements containing steelwork dusts have been prepared using a low temperature hydrothermal method (200 degrees C, 48h). The produced solids were characterized by means of XRD, IR, and SEM-EDX, and the remaining liquid was analyzed by ICP. The results clearly show the capability of these cements to inertise the heavy metals contained in steelwork dusts, that is Fe, Pb, Mo, Cr, Mn, Ni, and Zn. In the case of apatitic cements, Fe, Mg, Cr, Mn, and Pb coming from steel dust replaced Ca in the divalent cation position of the apatite structure, while Si and Mo replaced P in tetrahedral position. The average crystal size of the apatite-containing dust is smaller than in pure apatite synthesized using the same procedure, which is related to the magnesium content of the dust, since magnesium seems to inhibit the crystal growth. XRD diagrams of composite cements show only peaks corresponding to phases observed in the single cements, and in that no new phases are found. However, EDX analysis reveals the introduction of cations coming from Portland cement into the apatite structure. From the results of water analysis it could be concluded that the capability of retention is higher in composite matrices than in the pure apatite one. In conclusion, the obtained data allow stating that the proposed method, the hydrothermal synthesis of steelwork dust containing cement, is a reliable one for immobilization of toxic residues containing heavy leachable cations.
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Affiliation(s)
- M I Domínguez
- Instituto de Ciencia de Materiales de Sevilla, Centro Mixto CSIC-Universidad de Sevilla, Avda, Américo Vespucio s/n 41092 Sevilla, Spain.
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13
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Díaz A, López T, Manjarrez J, Basaldella E, Martínez-Blanes JM, Odriozola JA. Growth of hydroxyapatite in a biocompatible mesoporous ordered silica. Acta Biomater 2006; 2:173-9. [PMID: 16701875 DOI: 10.1016/j.actbio.2005.12.006] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2005] [Revised: 11/30/2005] [Accepted: 12/06/2005] [Indexed: 10/25/2022]
Abstract
A novel biomaterial (HA-SBA-15) has been developed based on the growth of calcium phosphate hydroxyapatite (HA) nanoparticles within an organized silica structure (SBA-15). Characterization of the material was carried out using a combination of X-ray diffraction, X-ray fluorescence, transmission electron microscopy, N2 adsorption-desorption isotherms and nuclear magnetic resonance. Transmission electron microscopy observations and N2 porosimetry revealed the crystallization of hydroxyapatite nanoparticles inside the mesopore cavities of the silica structure. Specific surface areas of 760 m2 g(-1) and 260 m2 g(-1) were measured for the SBA-15 and the HA-SBA-15 material, respectively. The hydroxyl groups present in the silica nanostructure surface have brought about cationic defects in the silicium sites, mainly with those of tetrahedral symmetry, and promoted the formation of siloxanes. 29Si MAS-NMR analysis shows a significant reduction of the silanol groups concentration with HA growing within the base (SBA-15) material. Studies and brain tissue biocompatibility tests were carried out. Histopathological studies on the SBA-15 implant material showed no changes to the tissue nearby. The results confirmed the synthesis of a silica-based composite containing HA nanoparticles with the potential for biomedical applications.
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Affiliation(s)
- A Díaz
- Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla (Centro Mixto CSIC-Universidad de Sevilla), Centro de Investigaciones Científicas Isla de la Cartuja, Spain.
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14
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Massiot P, Centeno MA, Gouriou M, Domínguez MI, Odriozola JA. Sol–gel obtained silicophosphates as materials to retain caesium at high temperatures. ACTA ACUST UNITED AC 2003. [DOI: 10.1039/b208698k] [Citation(s) in RCA: 21] [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: 11/21/2022]
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15
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Kelly DG, Odriozola JA, Somorjai GA. Chemisorption and surface reactions of molecular deuterium and hydrocarbons on the rhenium(0001) single-crystal surface clean and in the presence of co-adsorbed sulfur or carbon. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100306a037] [Citation(s) in RCA: 21] [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: 11/29/2022]
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16
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Capitan MJ, Malet P, Centeno MA, Munoz-Paez A, Carrizosa I, Odriozola JA. Samarium oxide (Sm2O3)/alumina catalysts for methane coupling. Influence of the structure of surface samarium-aluminum-oxygen phases on the reactivity. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100138a027] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [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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17
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Odriozola JA, Soria J, Somorjai GA, Heinemann H, Garcia de la Banda JF, Lopez Granados M, Conesa JC. Adsorption of nitric oxide and ammonia on vanadia-titania catalysts: ESR and XPS studies of adsorption. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100154a047] [Citation(s) in RCA: 54] [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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18
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Capitan MJ, Centeno MA, Malet P, Carrizosa I, Odriozola JA, Marquez A, Fernandez Sanz J. Drifts, XPS, XAS, and ab Initio Study of Lanthanide Oxides Supported on .gamma.-Al2O3. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100013a041] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Centeno MA, Malet P, Carrizosa I, Odriozola JA. Lanthanide Doped V2O5/Al2O3 Catalysts: Structure−Activity Relationship in the SCR of NOx. J Phys Chem B 2000. [DOI: 10.1021/jp993084a] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. A. Centeno
- Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla-CSIC, Centro de Investigaciones Científicas Isla de la Cartuja, Avda. Americo Vespuccio s/n, 41092 Sevilla, Spain
| | - P. Malet
- Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla-CSIC, Centro de Investigaciones Científicas Isla de la Cartuja, Avda. Americo Vespuccio s/n, 41092 Sevilla, Spain
| | - I. Carrizosa
- Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla-CSIC, Centro de Investigaciones Científicas Isla de la Cartuja, Avda. Americo Vespuccio s/n, 41092 Sevilla, Spain
| | - J. A. Odriozola
- Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla-CSIC, Centro de Investigaciones Científicas Isla de la Cartuja, Avda. Americo Vespuccio s/n, 41092 Sevilla, Spain
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20
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Pa�l A, Elmrabet S, Ager FJ, Odriozola JA. High-temperature oxidation behaviour of EN-1.4301 stainless-steel after surface Ce deposition by a modified CVD method. SURF INTERFACE ANAL 2000. [DOI: 10.1002/1096-9918(200008)30:1<176::aid-sia763>3.0.co;2-b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Alves LC, Pa�l A, Alves E, da Silva MF, Soares JC, Rebouta L, La Barbera A, Riciordi B, Centeno MA, Odriozola JA. Surface studies of SiC/SiCf composites exposed to relevant fusion reactor conditions. SURF INTERFACE ANAL 2000. [DOI: 10.1002/1096-9918(200008)30:1<98::aid-sia710>3.0.co;2-s] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Capitan MJ, Lefebvre S, Traverse A, Paúl A, Odriozola JA. Anomalous scattering study of oxide scales formed at 1173 K on surface modified stainless steel. ACTA ACUST UNITED AC 1998. [DOI: 10.1039/a802233j] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Benítez JJ, Díaz A, Laurent Y, Grange P, Odriozola JA. Diffuse Reflectance Infrared (DRIFTS) and Mass Spectrometry Study of Thermal Stability of Aluminophosphate Oxynitrides (AlPON). ACTA ACUST UNITED AC 1997. [DOI: 10.1524/zpch.1997.202.part_1_2.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- J. J. Benítez
- Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla-CSIC, Apdo 874, 41080 Sevilla, Spain
| | - A. Díaz
- Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla-CSIC, Apdo 874, 41080 Sevilla, Spain
| | - Y. Laurent
- Laboratoire de Chimie des Matériaux, URA 1496 CNRS, Université de Rennes I, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - P. Grange
- Unité de Catalyse et Chimie des Matériaux Divisés, Université Catholiquid de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - J. A. Odriozola
- Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla-CSIC, Apdo 874, 41080 Sevilla, Spain
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Affiliation(s)
- A. Díaz
- Grupo de Ingeniería Química, Departamento de Química Aplicada, Facultad de Ciencias Químicas de San Sebastián, Universidad del País Vasco, Apdo. 1072, 28080 San Sebatián, Spain
| | - D. R. Acosta
- Grupo de Ingeniería Química, Departamento de Química Aplicada, Facultad de Ciencias Químicas de San Sebastián, Universidad del País Vasco, Apdo. 1072, 28080 San Sebatián, Spain
| | - J. A. Odriozola
- Grupo de Ingeniería Química, Departamento de Química Aplicada, Facultad de Ciencias Químicas de San Sebastián, Universidad del País Vasco, Apdo. 1072, 28080 San Sebatián, Spain
| | - M. Montes
- Grupo de Ingeniería Química, Departamento de Química Aplicada, Facultad de Ciencias Químicas de San Sebastián, Universidad del País Vasco, Apdo. 1072, 28080 San Sebatián, Spain
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Zurdo J, Centeno MA, Odriozola JA, Fernández-Cabrera C, Ramírez JM. The structural role of the carotenoid in the bacterial light-harvesting protein 2 (LH2) of Rhodonbacter capsulatus. A Fourier transform Raman spectroscopy and circular dichroism study. Photosynth Res 1995; 46:363-369. [PMID: 24301604 DOI: 10.1007/bf00020452] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/1995] [Accepted: 03/30/1995] [Indexed: 06/02/2023]
Abstract
In previous work (Zurdo J, Fernández-Cabrera C and Ramírez JM (1993) Biochem J 290: 531-537), it had been shown that selective extraction of the carotenoid from the light-harvesting protein 2 (LH2) of Rhodobacter capsulatus induced the dissociation of 800-nm absorbing bacteriochlorophyll (Bchl), a 10-nm red shift of 854-nm Bchl, and a decrease of the stability of the protein in detergent solution. In the present study, the Fourier transform Raman and near-infrared circular dichroism spectra of native and carotenoid-depleted LH2 membrane preparations were compared. It was found that while the coupled carbonyls of 854-nm Bchl remained specifically H-bonded to the peptides after carotenoid extraction, the optical activity of the near-infrared electronic transition was significantly altered. Given the excitonic origin of such optical activity, our data suggest that carotenoid extraction elicits a rearrengement of the chromophore cluster and of the associated polypeptide subunits. This implies a significant role of the carotenoid in maintaining the native quaternary structure of the protein, which would be consistent with the observed dissociation of 800-nm Bchl and the loss of solubilized LH2 stability that result from carotenoid removal. There is no evidence for a similar role of the carotenoid in the LH1 protein.
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Affiliation(s)
- J Zurdo
- Centro de Investigaciones Biológicas, CSIC, Velázquez 144, 28006, Madrid, Spain
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Ben⩼ez JJ, Centeno MA, Odriozola JA, Conanec R, Marchand R, Laurent Y. Characterization of AlPO systems, precursors of the novel basic catalyst family AlPON. Catal Letters 1995. [DOI: 10.1007/bf00806888] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Alvarez LJ, León LE, Sanz JF, Capitán MJ, Odriozola JA. Surface structure of cubic aluminum oxide. Phys Rev B Condens Matter 1994; 50:2561-2565. [PMID: 9976477 DOI: 10.1103/physrevb.50.2561] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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