Download or read book Flame Synthesis and Applications of Metal Oxide Nanowires written by Pratap Mahesh Rao and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Herein, two novel methods for the flame synthesis of metal oxide nanowire arrays and related nanomaterials are developed and investigated. Both methods are rapid (micrometer/minute axial growth rate), atmospheric, controllable and scalable, and result in highly pure and crystalline materials. Simultaneously, these methods allow the growth of metal oxide nanowires on diverse, technologically relevant, and often delicate substrates. The first method is flame-heated solid phase diffusion growth, in which a metal substrate is rapidly heated to high temperatures by a flame, and metal oxide nanowires grow by metal diffusion out of the substrate in the hot, oxidative post-flame environment. The second is flame vapor deposition, in which the flame oxidizes and evaporates metals at high temperatures to produce large concentrations of oxide vapors that condense onto cooler substrates in the form of nanowires and other nanostructures. In each method, the chemical composition, growth rate and morphology (shape, packing density and alignment) of the nanostructures can be finely controlled by tuning flame parameters such as the fuel/air ratio and temperature, and substrate parameters such as surface energy and temperature. Moreover, an application of flame synthesized nanowires is demonstrated for the first time. As a result of superior morphology (increased length and packing density), the photoelectrochemical water-splitting performance of flame-synthesized tungsten trioxide nanowires is more than twice that of state of the art tungsten trioxide nanowire photoanodes synthesized by conventional hydrothermal and vapor deposition methods. These flame synthesis methods may enable future generations of technologies based on metal oxide nanowires to be developed and deployed on a large scale.

Download or read book Flame Synthesis and Doping of Metal Oxide Nanowires and Their Application in Solar Water Splitting written by Lili Cai and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Considering the increasing energy and environmental problems associated with the exhaustible fossil fuels, renewable energy conversion devices have attracted tremendous attention, which hold the promise to supply the fuel and electricity in a sustainable way. For many of these devices, such as batteries, fuel cells, solar cells and solar water splitting cells, metal oxides are very important functional materials due to their earth abundance, good stability and diverse properties. Recently nanowire-based metal oxides have enabled revolutionary advances in various energy conversion devices, because of their unique physical and chemical properties resulting from the high aspect ratio and large surface area. Despite their advantages, practical applications of metal oxide nanowires are hindered, as conventional synthesis methods have limitations for large scale production. Flame synthesis can potentially solve this large-scale production issue for metal oxide nanowires, given its demonstrated scalability in the industrial production of nanoparticles. However, only until very recently has flame synthesis been applied to metal oxide nanowires. More research is needed to develop advanced flame synthesis method for metal oxide nanowires, to understand the mechanism to well control the size, shape and compositions for reliable manufacture, and to evaluate their quality and functionalities in real devices. This thesis presents a novel flame vapor deposition method for the synthesis of metal oxide nanowires with the capabilities of rapid rate, good uniformity over large area and broad substrate choice. Through the investigation of growth mechanism, good control over the morphology and composition was achieved by tuning the process parameters such as fuel/air ratio, source temperature, substrate material and temperature. In addition to synthesis, flame-based doping method (sol-flame doping) was innovated for controllable doping of metal oxide NWs to modify the properties of host materials at the nanometer scale. This sol-flame doping method not only preserves the morphology and crystallinity of the host NWs, but also allows fine control over the dopant concentration by simply varying the concentration of dopant precursor solution. With this method, significant enhancement of the electrocatalytic activity towards oxygen evolution reaction was achieved for TiO2 NWs (up to 760 mV reduction of the overpotential), attributing to simultaneously improved surface charge transfer kinetics and increased bulk conductivity by doping. Finally, the flame-synthesized metal oxide nanowires were implemented as a photoanode in photoelectrochemical water splitting. By rational design and scalable fabrication, the WO3/BiVO4/Ni:FeOOH composite nanowire photoanode generated a high photocurrent of 4.5 mA/cm2 at a potential of 1.23 VRHE under simulated sunlight, which is among the highest produced by any WO3/BiVO4 based photoanodes. With the demonstrated rapid rate, good controllability and superior performance of the flame-produced metal oxide nanowires, these flame synthesis and doping methods can potentially enable future generation of energy devices by removing the barrier for large-scale production of tailored metal oxide nanowires.

Download or read book Semi conducting Metal Oxide Nanoparticles from a Low pressure Premixed H 1tn2 O 1tn2 Ar Flame Synthesis and Characterization written by Pascal Onyibo Ifeacho and published by Cuvillier Verlag. This book was released on 2008 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On Flame Synthesis of Metal Oxide Nanoparticles written by Manfred Geier and published by . This book was released on 2009 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Colloidal Metal Oxide Nanoparticles written by and published by Elsevier. This book was released on 2019-10-16 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Colloidal Metal Oxide Nanoparticles: Synthesis, Characterization and Applications is a one-stop reference for anyone with an interest in the fundamentals, synthesis and applications of this interesting materials system. The book presents a simple, effective and detailed discussion on colloidal metal oxide nanoparticles. It begins with a general introduction of colloidal metal oxide nanoparticles, then delves into the most relevant synthesis pathways, stabilization procedures, and synthesis and characterization techniques. Final sections discuss promising applications, including bioimaging, biosensing, diagnostic, and energy applications—i.e., solar cells, supercapacitors and environment applications—i.e., the treatment of contaminated soil, water purification and waste remediation. Provides the most comprehensive resource on the topic, from fundamentals, to synthesis and characterization techniques Presents key applications, including biomedical, energy, electronic and environmental Discusses the most relevant techniques for synthesis, patterning and characterization

Download or read book Solution Methods for Metal Oxide Nanostructures written by Rajaram S. Mane and published by Elsevier. This book was released on 2023-06-27 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solution Methods for Metal Oxide Nanostructures reviews solution processes that are used for synthesizing 1D, 2D and 3D metal oxide nanostructures in either thin film or in powder form for various applications. Wet-chemical synthesis methods deal with chemical reactions in the solution phase using precursors at proper experimental conditions. Wet-chemical synthesis routes offer a high degree of controllability and reproducibility for 2D nanomaterial fabrication. Solvothermal synthesis, template synthesis, self-assembly, oriented attachment, hot-injection, and interface-mediated synthesis are the main wet-chemical synthesis routes for 2D nanomaterials. Solution Methods for Metal Oxide Nanostructures also addresses the thin film deposition metal oxides nanostructures, which plays a very important role in many areas of chemistry, physics and materials science.Each chapter includes information on a key solution method and their application in the design of metal oxide nanostructured materials with optimized properties for important applications. The pros and cons of the solution method and their significance and future scope is also discussed in each chapter. Readers are provided with the fundamental understanding of the key concepts of solution synthesis methods for fabricating materials and the information needed to help them select the appropriate method for the desired application. Reviews the most relevant wet chemical solution methods for metal oxide nanostructures, including sol-gel, solvothermal, hydrothermal, co-precipitation methods, and more Addresses thin film deposition techniques for metal oxide nanostructures, such as spray-pyrolysis, electrodeposition, spin coating and self-assembly Discusses the pros and cons of each solution method and its significance and future opportunities

Download or read book Metal Oxide Based Nanofibers and Their Applications written by Vincenzo Esposito and published by Elsevier. This book was released on 2021-10-25 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide-based Nanofibers and their Applications provides an in-depth overview on developments surrounding the synthesis, characterization properties, and applications achieved by scientific leaders in the area. Sections deal with the theoretical and experimental aspects of the synthesis and methodologies to control microstructure, composition and shape of the nanofibrous metal oxides, review the applications of metal oxide nanofibers in diverse technologies, with special focus on the relation between the structural, morphological and compositional features of the nanofibers, cover applications of metal oxide nanofibers in the fields of sensing (biosensing, gas sensing), and consider biomedical and cleaning technologies. Lastly, a final section covers their application in energy generation and storage technologies (e. g. piezoelectric, solar cells, solid oxide fuel cells, lithium-ion batteries, supercapacitors, and hydrogen storage are reviewed. Reviews electrospinning methods for the synthesis and design of nanocomposites and hybrid metal oxide nanofibers Discusses applications of metal oxide nanofibers in sensing, biomedical fields, cleaning technologies, and energy Emphasizes the structural, morphological and compositional properties of nanofibers and their effect on device performance

Download or read book Flame Synthesis of Transition Metal oxide Nanoforms written by Walmy Cuello Jimenez and published by . This book was released on 2010 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Applications of Metal Oxide Nanowires written by Li-Chia Tien and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The growth of epitaxial SnO2 on c-sapphire using pulsed laser deposition is examined. X-ray diffraction analysis shows that the films are highly a-axis oriented SnO2 with the rutile structure. The effects of Ga doping on SnO2 films were studied. The Hall data showed p-type behavior occurs only at specific growth condition, but converted back to n-type and degraded as time proceeds.

Download or read book Investigating Flame based Synthesis of Carbon Nanotubes and Metal oxide Nanowires written by Fusheng Xu and published by . This book was released on 2007 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synthesis of carbon nanotubes (CNTs) and metal-oxide nanowires (e.g. ZnO, WO2.9) are examined experimentally by inserting probes into various flame geometries at atmospheric pressure. The main probed-flame configurations are the inverse co-flow diffusion flame (IDF) and the counter-flow diffusion flame (CDF), which are compared with each other to assess the translatability of local synthesis conditions in producing the same growth attributes and morphologies. The CDF is characterized using laser-based spontaneous Raman spectroscopy (SRS), and validated with simulations using detailed chemical kinetics and transport. SRS is used to measure local conditions in the 2-D axi-symmetric IDF. Properties of the as-synthesized nanostructures are determined by field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDXS), and resonance Raman spectroscopy (RRS). Various morphologies of CNTs are grown catalytically on metal-alloy substrates of different compositions (i.e., Fe, Fe/Cr, Ni/Cu, Ni/Ti, Ni/Cr, Ni/Cr/Fe), as well as on metal-oxide solid solutions (i.e. NiAl2O4, CoAl2O4 and ZnFe2O4). Vertically well-aligned multi-walled CNTs (MWNTs) with uniform diameters are obtained from Ni/Cr/Fe and Ni/Ti alloys. CNTs produced from ZnFe2O4 substrates are found to be a mixture of MWNTs and single-walled carbon nanotubes (SWNTs) with at least 30% SWNTs by number. Effects of local gas-phase temperature, substrate temperature, carbon-based precursor species concentrations, and substrate voltage bias on CNT formation, diameter, growth rate, yield, density, and morphology are investigated. Aligned single-crystal tungsten oxide nanowires with diameters of 20-50nm are grown directly from tungsten substrates at high rates, with local gas-phase temperature and chemical species specified at the substrate for self-synthesis. Voltage bias is shown to dramatically alter the morphologies of the as-synthesized WOx nanomaterial. Single-crystalline ZnO nanowires are grown directly on zinc-plated steel substrates at high rates with no catalysts. Larger-diameter (>100nm) nanowires are produced at higher temperatures; while smaller-diameter (25-40nm) nanowires are produced at lower temperatures, and only on the fuel side of the reaction zone. Reactions with H2O appear to be the dominant route for nanowire synthesis. Nanoribbons and other nanowire-based morphologies are also found and discussed.

Download or read book Metal Oxide Nanostructures Chemistry written by Jean-Pierre Jolivet and published by Oxford University Press. This book was released on 2019-01-04 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This much-anticipated new edition of Jolivet's work builds on the edition published in 2000. It is entirely updated, restructured and increased in content. The book focuses on the formation by techniques of green chemistry of oxide nanoparticles having a technological interest. Jolivet introduces the most recent concepts and modelings such as dynamics of particle growth, ordered aggregation, ionic and electronic interfacial transfers. A general view of the metal hydroxides, oxy-hydroxides and oxides through the periodic table is given, highlighting the influence of the synthesis conditions on crystalline structure, size and morphology of nanoparticles. The formation of aluminum, iron, titanium, manganese and zirconium oxides are specifically studied. These nanomaterials have a special interest in many technological fields such as ceramic powders, catalysis and photocatalysis, colored pigments, polymers, cosmetics and also in some biological or environmental phenomena.

Download or read book Investigating Local Growth Conditions in the Flame Synthesis of Metal oxide Nanostructures written by Cassandra D'Esposito and published by . This book was released on 2009 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synthesis of metal-oxide nanowires (i.e. WO2.9, ZnO, Cu2O, and Fe3O4) and nanoplates (i.e. MoO2) is examined experimentally with metal-substrate probes inserted into counter-flow diffusion flames (CDFs) at atmospheric pressure. The quasi-one-dimensional flow field allows for correlation between morphologies and local growth conditions, as well as the tailoring of the flame structure, through computational simulations with detailed chemical kinetics and transport, to provide conditions suitable for gas-phase growth of nanostructures. Comparisons of products synthesized between methane and hydrogen flames, as well as between locations probed on either the fuel side or the air side of the reaction zone, permit evaluation of the roles of O2 versus H2O versus CO2 in the oxidative route(s) involved. The as-synthesized nanostructures are characterized by field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), and energy dispersive X-ray spectroscopy (EDXS). Tungsten oxide nanowires are grown with diameters ranging from 50 to 200 nm at 1720K. The crystal structure is tetragonal WO2.9, but the growth directions vary with flame conditions. Single-crystal ZnO nanostructures are formed at 1000, 1300, and 1600K. All growth mechanisms are possible based on Gibbs free energy calculations. Molybdenum oxide nanoplates are grown in the methane flame at 2000K on both the air and fuel sides, where similar amounts of H2O and CO2 are found. In the hydrogen flame, oxidized structures are grown on the air side, and micron sized plates are synthesized on the fuel side. Cu2O nanowires are grown only on the air side of the methane and hydrogen flames, where large amounts of oxygen are present. The fuel sides of both flames show nucleation sites on the surface but no nanowire growth. Iron oxide nanowires are formed on the air side of the methane and hydrogen flames. Carbon nanotubes and nanowires are grown on the fuel side of the methane flame, while iron-oxide nodules are formed on the fuel side of the hydrogen flame.

Download or read book Metal Oxide Nanostructures written by Daniela Nunes and published by Elsevier. This book was released on 2018-11-01 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide Nanostructures: Synthesis, Properties and Applications covers the theoretical and experimental aspects related to design, synthesis, fabrication, processing, structural, morphological, optical and electronic properties on the topic. In addition, it reviews surface functionalization and hybrid materials, focusing on the advantages of these oxide nanostructures. The book concludes with the current and future prospective applications of these materials. Users will find a complete overview of all the important topics related to oxide nanostructures, from the physics of the materials, to its application. Delves into hybrid structured metal oxides and their promising use in the next generation of electronic devices Includes fundamental chapters on synthesis design and the properties of metal oxide nanostructures Provides an in-depth overview of novel applications, including chromogenics, electronics and energy

Download or read book Metal Oxide Nanocomposites written by B. Raneesh and published by John Wiley & Sons. This book was released on 2021-02-17 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide Nanocomposites: Synthesis and Applications summarizes many of the recent research accomplishments in the area of metal oxide-based nanocomposites. This book focussing on the following topics: Nanocomposites preparation and characterization of metal oxide nanocomposites; synthesis of core/shell metal oxide nanocomposites; multilayer thin films; sequential assembly of nanocomposite materials; semiconducting polymer metal oxide nanocomposites; graphene-based metal and metal oxide nanocomposites; carbon nanotube–metal–oxide nanocomposites; silicon mixed oxide nanocomposites; gas semiconducting sensors based on metal oxide nanocomposites; metal ]organic framework nanocomposite for hydrogen production and nanocomposites application towards photovoltaic and photocatalytic.

Download or read book Plasma Synthesis of Metal oxide Nanowires and Their Application written by Gregor Filipič (fizik.) and published by . This book was released on 2014 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metal Oxide Nanocomposite Thin Films for Optoelectronic Device Applications written by Rayees Ahmad Zargar and published by John Wiley & Sons. This book was released on 2023-11-07 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: METAL OXIDE NANOCOMPOSITE THIN FILMS FOR OPTOELECTRONIC DEVICE APPLICATIONS The book provides insight into the fundamental aspects, latest research, synthesis route development, preparation, and future applications of metal oxide nanocomposite thin films. The fabrication of thin film-based materials is important to the future production of safe, efficient, and affordable energy as the devices convert sunlight into electricity. Thin film devices allow excellent interface engineering for high-performance printable solar cells as their structures are highly reliable and stand-alone systems can provide the required megawatts. They have been used as power sources in solar home systems, remote buildings, water pumping, megawatt-scale power plants, satellites, communications, and space vehicles. Metal Oxide Nanocomposite Thin Films for Optoelectronic Device Applications covers the basics of advanced nanometal oxide-based materials, their synthesis, characterization, and applications, and all the updated information on optoelectronics. Topics discussed include the implications of metal oxide thin films, which are critical for device fabrications. It provides updated information on the economic aspect and toxicity, with great focus paid to display applications, and covers some core areas of nanotechnology, which are particularly concerned with optoelectronics and the available technologies. The book concludes with insights into the role of nanotechnology and the physics behind photovoltaics. Audience The book will be an important volume for electronics and electrical engineers, nanotechnologists, materials scientists, inorganic chemists in academic research, and those in industries, exploring the applications of nanoparticles in semiconductors, power electronics, and more.

Download or read book Metal Oxide Core Shell Nanoparticle Synthesis And Applications written by Avin Yan and published by . This book was released on 2024-01-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Metal Oxide Core-Shell Nanoparticle Synthesis and Applications" is an essential guide for researchers and scientists working in the field of materials science, particularly in the area of nanotechnology. Author is a distinguished expert in the field, this book provides a comprehensive overview of the synthesis and applications of metal oxide core-shell nanoparticles. The book begins with an introduction to the fundamental concepts of nanotechnology and the synthesis of metal oxide nanoparticles, followed by a detailed discussion of the core-shell structure and the different synthesis methods used to produce these particles. The author also covers the characterization techniques used to analyze the properties of these particles, such as transmission electron microscopy (TEM), X-ray diffraction (XRD), and Raman spectroscopy. The latter half of the book is dedicated to exploring the various applications of metal oxide core-shell nanoparticles, including their use in catalysis, energy storage, environmental remediation, and biomedical applications. The author provides examples of current research in these areas and discusses the potential future directions for research in this field. Overall, "Metal Oxide Core-Shell Nanoparticle Synthesis and Applications" is a valuable resource for scientists and researchers seeking to advance their understanding of the synthesis and application of metal oxide core-shell nanoparticles. The clear and concise writing style, combined with the extensive references and practical examples, makes this book an essential addition to any materials science library.