Sol-Gel Synthesis of La(0.6)Sr(0.4)Coo(3-X) and Sm(0.5)Sr(0.5)Coo(3-X) Cathode Nanopowders for Solid Oxide Fuel Cells PDF Download
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Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781794346741
Category : Science
Languages : en
Pages : 32
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Book Description
Nanopowders of La(0.6)Sr(0.4)CoO(3-x) (LSC) and Sm(0.5)Sr(0.5)CoO(3-x) (SSC) compositions, which are being investigated as cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFC) with La(Sr)Ga(Mg)O(3-x) (LSGM) as the electrolyte, were synthesized by low-temperature sol-gel method using metal nitrates and citric acid. Thermal decomposition of the citrate gels was followed by simultaneous DSC/TGA methods. Development of phases in the gels, on heat treatments at various temperatures, was monitored by x-ray diffraction. Solgel powders calcined at 550 to 1000 C consisted of a number of phases. Single perovskite phase La(0.6)Sr(0.4)CoO(3-x) or Sm(0.5)Sr(0.5)CoO(3-x) powders were obtained at 1200 and 1300 C, respectively. Morphological analysis of the powders calcined at various temperatures was done by scanning electron microscopy. The average particle size of the powders was approx.15 nm after 700 C calcinations and slowly increased to 70 to 100 nm after heat treatments at 1300 to 1400 C. Bansal, Narottam P. and Wise, Brent Glenn Research Center NASA/TM-2011-217222, E-17905
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781794346741
Category : Science
Languages : en
Pages : 32
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Book Description
Nanopowders of La(0.6)Sr(0.4)CoO(3-x) (LSC) and Sm(0.5)Sr(0.5)CoO(3-x) (SSC) compositions, which are being investigated as cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFC) with La(Sr)Ga(Mg)O(3-x) (LSGM) as the electrolyte, were synthesized by low-temperature sol-gel method using metal nitrates and citric acid. Thermal decomposition of the citrate gels was followed by simultaneous DSC/TGA methods. Development of phases in the gels, on heat treatments at various temperatures, was monitored by x-ray diffraction. Solgel powders calcined at 550 to 1000 C consisted of a number of phases. Single perovskite phase La(0.6)Sr(0.4)CoO(3-x) or Sm(0.5)Sr(0.5)CoO(3-x) powders were obtained at 1200 and 1300 C, respectively. Morphological analysis of the powders calcined at various temperatures was done by scanning electron microscopy. The average particle size of the powders was approx.15 nm after 700 C calcinations and slowly increased to 70 to 100 nm after heat treatments at 1300 to 1400 C. Bansal, Narottam P. and Wise, Brent Glenn Research Center NASA/TM-2011-217222, E-17905
Author: Mario Aparicio
Publisher: Springer Science & Business Media
ISBN: 1461419565
Category : Technology & Engineering
Languages : en
Pages : 399
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Book Description
Sol-Gel Processing for Conventional and Alternative Energy is a comprehensive source of information on the use of sol-gel processing in materials in energy systems, conversion, storage, and generation. The volume editors include numerous applications, primarily in nuclear fuel processing, electrolytes for fuel cells, and dye-sensitized solar cells (DSSC). In addition to examining contemporary processing, properties, and industrial applications, "Sol-Gel Processing for Conventional and Alternative Energy" identifies materials challenges presented by conventional and alternative energy generation that require new materials and innovative processing. Each chapter is written by an internationally respected researcher. The book provides a state-of-the-art treatment of different aspects of materials for energy production, with a focus on processing, and covers related topics such as carbon sequestration, clean energy, and biofuels.
Author: Guadalupe Valverde Aguilar
Publisher: BoD – Books on Demand
ISBN: 1789853338
Category : Technology & Engineering
Languages : en
Pages : 108
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Book Description
The sol-gel method is a powerful route of synthesis used worldwide. It produces bulk, nano- and mesostructured sol-gel materials, which can encapsulate metallic and magnetic nanoparticles, non-linear azochromophores, perovskites, organic dyes, biological molecules, etc.. This can have interesting applications for catalysis, photocatalysis; drug delivery for treatment of neurodegenerative diseases such as cancer, Parkinson's and Azheimer's. In this book, valuable contributions related to novel materials synthesized by the sol-gel route are provided. The effect of the sol-gel method to synthesize these materials with potential properties is described, and how the variation of the parameters during the synthesis influences their design and allows to adjust their properties according to the desired application is discussed.
Author: David Levy
Publisher: John Wiley & Sons
ISBN: 352767084X
Category : Technology & Engineering
Languages : en
Pages : 1616
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Book Description
This comprehensive three-volume handbook brings together a review of the current state together with the latest developments in sol-gel technology to put forward new ideas. The first volume, dedicated to synthesis and shaping, gives an in-depth overview of the wet-chemical processes that constitute the core of the sol-gel method and presents the various pathways for the successful synthesis of inorganic and hybrid organic-inorganic materials, bio- and bio-inspired materials, powders, particles and fibers as well as sol-gel derived thin films, coatings and surfaces. The second volume deals with the mechanical, optical, electrical and magnetic properties of sol-gel derived materials and the methods for their characterization such as diffraction methods and nuclear magnetic resonance, infrared and Raman spectroscopies. The third volume concentrates on the various applications in the fields of membrane science, catalysis, energy research, biomaterials science, biomedicine, photonics and electronics.
Author: Usha Chandra
Publisher: BoD – Books on Demand
ISBN: 9535132458
Category : Science
Languages : en
Pages : 312
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Book Description
Versatility, extended compositional ranges, better homogeneity, lesser energy consumption, and requirement of nonexpensive equipments have boosted the use of sol-gel process on top of the popularity in the synthesis of nanosystems. The sol-gel technique has not only revolutionized oxide ceramics industry and/or material science but has also extended widely into multidimensional applications. The book Recent Applications in Sol-Gel Synthesis comprises 14 chapters that deal mainly with the application-oriented aspects of the technique. Sol-gel prepared metal oxide (MO) nanostructures like nanospheres, nanorods, nanoflakes, nanotubes, and nanoribbons have been employed in biomedical applications involving drug deliveries, mimicking of natural bone, and antimicrobial activities. The possibility of controlling grain size in aerogel and preparation of ultrahigh-temperature ceramic (UHTC)-based materials, fluorescent glasses, ultraviolet photosensors, and photocatalysts have been discussed in detail by the experts in the field. The usefulness of sol-gel materials as active GRIN, as textile finisher, and as leather modifier with water-repellent and oil-resistive properties would be an incentive for researchers keen to pursue the field.
Author: Suresh C. Pillai
Publisher: Springer
ISBN: 3319501445
Category : Technology & Engineering
Languages : en
Pages : 323
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Book Description
This volume provides expert coverage of the state-of-the-art in sol-gel materials for functional applications in energy, environment and electronics. The use of sol-gel technology has become a hotbed for cutting edge developments in many fields due to the accessibility of advanced materials through low energy processes. The book offers a broad view of this growing research area from basic science through high-level applications with the potential for commercialization and industrial use. Taking an integrated approach, expert chapters present a wide range of topics, from photocatalysts, solar cells and optics, to thin films and materials for energy storage and conversion, demonstrating the combined use of chemistry, physics, materials science and engineering in the search for solutions to some of the most challenging problems of our time.
Author: Siti Salwa Alias
Publisher: Springer Science & Business Media
ISBN: 9814560774
Category : Technology & Engineering
Languages : en
Pages : 59
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Book Description
This book focuses on the study of synthesized ZnO powder using Zn(CH3COO)2∙2H2O precursor, methanol (as solvent), and sodium hydroxide (NaOH) to vary the pH. The successfully synthesized ZnO powder from the sol-gel centrifugation and sol-gel storage methods were characterized and investigated by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, UV–visible spectroscopy, and photoluminescence test to compare the properties of the nanoparticles. The best characteristic of the ZnO powder from both methods was observed when the powders were coated on an ITO glass to fabricate a PEC. The current density–voltage performances of both PECs were investigated under luminescent and dark conditions.
Author: David Levy
Publisher: John Wiley & Sons
ISBN: 3527334866
Category : Technology & Engineering
Languages : en
Pages : 1604
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Book Description
This comprehensive three-volume handbook brings together a review of the current state together with the latest developments in sol-gel technology to put forward new ideas. The first volume, dedicated to synthesis and shaping, gives an in-depth overview of the wet-chemical processes that constitute the core of the sol-gel method and presents the various pathways for the successful synthesis of inorganic and hybrid organic-inorganic materials, bio- and bio-inspired materials, powders, particles and fibers as well as sol-gel derived thin films, coatings and surfaces. The second volume deals with the mechanical, optical, electrical and magnetic properties of sol-gel derived materials and the methods for their characterization such as diffraction methods and nuclear magnetic resonance, infrared and Raman spectroscopies. The third volume concentrates on the various applications in the fields of membrane science, catalysis, energy research, biomaterials science, biomedicine, photonics and electronics.
Author: Lisa Klein
Publisher: Springer Nature
ISBN: 3319321013
Category : Technology & Engineering
Languages : en
Pages : 3755
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Book Description
This completely updated and expanded second edition stands as a comprehensive knowledgebase on both the fundamentals and applications of this important materials processing method. The diverse, international team of contributing authors of this reference clarify in extensive detail properties and applications of sol-gel science and technology as it pertains to the production of substances, active and non-active, including optical, electronic, chemical, sensor, bio- and structural materials. Essential to a wide range of manufacturing industries, the compilation divides into the three complementary sections: Sol-Gel Processing, devoted to general aspects of processing and recently developed materials such as organic-inorganic hybrids, photonic crystals, ferroelectric coatings, and photocatalysts; Characterization of Sol-Gel Materials and Products, presenting contributions that highlight the notion that useful materials are only produced when characterization is tied to processing, such as determination of structure by NMR, in-situ characterization of the sol-gel reaction process, determination of microstructure of oxide gels, characterization of porous structure of gels by the surface measurements, and characterization of organic-inorganic hybrid; and Applications of Sol-Gel Technology, covering applications such as the sol-gel method used in processing of bulk silica glasses, bulk porous gels prepared by sol-gel method, application of sol-gel method to fabrication of glass and ceramic fibers, reflective and antireflective coating films, application of sol-gel method to formation of photocatalytic coating films, and application of sol-gel method to bioactive coating films. The comprehensive scope and integrated treatment of topics make this reference volume ideal for R&D scientists and engineers across a wide range of disciplines and professional interests.
Author: Tessy Maria Lopez
Publisher: Springer Science & Business Media
ISBN: 146150449X
Category : Technology & Engineering
Languages : en
Pages : 456
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Book Description
Emerging Fields in Sol-gel Science and Technology contains selected papers from the symposium on "Sol-Gel and Vitreous Materials and Applications" held during the International Materials Research Congress in Cancún, México in August 2002. One hundred and twenty researchers representing 10 countries attended this symposium. Some of the subjects covered in this symposium include 1.) synthesis of new materials endowed with outstanding and non-conventional optical, magnetic, electrical, thermal, catalytic, and mechanical properties; 2.) study of the sorption properties of model porous materials in order to test the validity of previous and recent theories; 3.) theoretical studies related to density functional theory, fractal and scaling law approaches, 4.) synthesis of biomaterials for use in medicine and pollution control; 5.) application of sol-gel colloids in the fine-chemistry industry in products such as fragrances and pharmaceuticals; 6.) development of special vitreous materials; 7.) implementation of inorganic thin films, and 8.) synthesis of materials for energy saving.
