June 15, 2021

Download Ebook Free Synthesis Of Nanostructured Materials In Near And/ Or Supercritical Fluids

Synthesis of Nanostructured Materials in Near and/or Supercritical Fluids

Synthesis of Nanostructured Materials in Near and/or Supercritical Fluids
Author : Can Erkey,Michael Turk
Publisher : Elsevier
Release Date : 2021-08-15
Category : Technology & Engineering
Total pages :210
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Synthesis of Nanostructured Materials in Near and/or Supercritical Fluids: Methods, Fundamentals and Modeling offers a comprehensive review of the current status of research, development and insights on promising future directions, covering the synthesis of nanostructured materials using supercritical fluid-based processes. The book presents fundamental aspects such as high-pressure phase behavior of complex mixtures, thermodynamics and kinetics of adsorption from supercritical solutions, mechanisms of particle formation phenomena in supercritical fluid-based processes, and models for further development. It bridges the gap between theory and application, and is a valuable resource for scientists, researchers and students alike. Includes thermodynamic and mass transfer data necessary for industrial plant design Explains the mechanisms of reactions in a supercritical fluid environment Lists numerous industrial processes for the production of many consumer products

Supercritical Fluids and Organometallic Compounds

Supercritical Fluids and Organometallic Compounds
Author : Can Erkey
Publisher : Elsevier
Release Date : 2011
Category : Science
Total pages :233
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Organometallic compounds are utilized as reagents in the preparation and processing of advanced nanostructured materials, as catalysts in the production of a wide variety of specialty chemicals and polymers, and as drugs. Supercritical fluid science and technology has a wide variety of applications ranging from extraction of pharmaceutically active compounds to the synthesis of advanced materials. The combination of organometallic chemistry and supercritical fluids has significant potential. This book covers the fundamental aspects and related applications in this rapidly growing area. Covers the preparation of nanostructured composite materials using supercritical fluids Focuses on the intersection of organometallic chemistry and supercritical fluids Addresses the behavior of organometallic compounds in supercritical fluid environments

Synthesis of Nanostructured Materials by Etching in Supercritical Carbon Dioxide

Synthesis of Nanostructured Materials by Etching in Supercritical Carbon Dioxide
Author : Anonim
Publisher : Unknown
Release Date : 2009
Category :
Total pages :228
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Supercritical CO2(scCO2) is emerging as a viable and environmentally sustainable platform for nanomaterials synthesis due to its tunable solvent properties combined with low surface tension and viscosity, which allow rapid, non-destructive wetting within small features. However, to advance the utility of this fluid, a more thorough understanding of surface chemistry at high pressures is needed. In this study, the behavior of reactive solids in scCO2was examined by etching thin dielectric, metal, and alloy films to determine the fundamental mechanisms controlling the reactions. Models were developed to describe the etching processes and to benchmark scCO2with conventional methods. Dielectric SiOxNyfilms were etched with an HF/pyridine complex dissolved in scCO2. The anhydrous etching process resulted in formation of a residual (NH4)2SiF6layer that limited transport of reactants to the film and caused a drop in reaction order. Partial removal of the salt was accomplished by sublimation under vacuum. Etching of thin CuO films with hexafluoroacetylacetone (hfacH) in scCO2was studied and found to occur via a 3-step Langmuir-Hinshelwood reaction sequence. The kinetic model showed that lower scCO2densities favored hfacH adsorption on the CuO surface and that scCO2solvation forces lowered the activation barrier for the rate-limiting step. Adding up to 10 & times the molar ratio of pure H2O to hfacH nearly doubled theetching rate through formation of a hydrogen-bonded hfacH complex. Both bulk and thin film AgCu alloys were selectively etched in scCO2to generatenanoporous Ag structures. As Cu was preferentially removed through selective oxidation and chelation, the Ag atoms conglomerated into successively larger clusters similar to mechanisms reported in aqueous phase dealloying. Supercritical dealloying was observed at Cu compositions below typical parting limits, suggesting enhanced fluid transport in the evolving pores. When using in situ oxidation, the etching reaction was limited by decomposition of H2O2. Inverse space image analysis of samples with initial phase domain sizes between 250 - 1000 nm showed that below a threshold of approximately 500 nm, the dealloyed feature size mimicked the starting microstructure. Larger phase domains prohibited surface diffusion of Ag between phases producing a mixture of large and small Ag nanostructures.

Particle Formation with Supercritical Fluids

Particle Formation with Supercritical Fluids
Author : Michael Türk
Publisher : Elsevier
Release Date : 2014-11-06
Category : Science
Total pages :152
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Particle formation with supercritical fluids is a promising alternative to conventional precipitation processes as it allows the reduction of particle size and control of morphology and particle size distribution without degradation or contamination of the product. The book comprehensively examines the current status of research and development and provides perspectives and insights on promising future directions. The introduction to high pressure and high temperature phase equilibria and nucleation phenomena provides the basic principles of the underlying physical and chemical phenomena, allowing the reader an understanding of the relationship between process conditions and particle characteristics. Bridging the gap between theory and application, the book imparts the scientific and engineering fundamentals for innovative particle formation processes. The interdisciplinary "modus operandi" will encourage cooperation between scientists and researchers from different but complementary disciplines. Focuses on the general principles of particle formation in supercritical fluids Considers high pressure and high temperature phase equilibria, fluid dynamics and nucleation theory Discusses the underlying physical and chemical phenomena needed to understand the different applications, pointing out the relationship between process conditions and product properties

Contributions to Science

Contributions to Science
Author : Anonim
Publisher : Unknown
Release Date : 2005
Category : Research
Total pages :129
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Supercritical Fluid Technology in Materials Science and Engineering

Supercritical Fluid Technology in Materials Science and Engineering
Author : Ya-Ping Sun
Publisher : CRC Press
Release Date : 2002-03-26
Category : Science
Total pages :600
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This title analyzes the chemical reactions, structures and fundamental properties of supercritical fluid systems for the production of new compounds, nanomaterials, fibers, and films. It complies contemporary research and technological advances for increased selectivity and reduced waste in chemical, industrial, pharmaceutical, and biomedical applications. Topics include fluid dynamics, catalysis, hydrothermal synthesis, surfactants, conducting polymers, crystal growth, and other aspects and applications of supercritical fluids.

Directory of Graduate Research

Directory of Graduate Research
Author : American Chemical Society. Committee on Professional Training
Publisher : Unknown
Release Date : 2005
Category : Biochemistry
Total pages :129
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Faculties, publications and doctoral theses in departments or divisions of chemistry, chemical engineering, biochemistry and pharmaceutical and/or medicinal chemistry at universities in the United States and Canada.

Supercritical Fluid Nanotechnology

Supercritical Fluid Nanotechnology
Author : Concepcion Domingo Pascual,Pascale Subra-Paternault
Publisher : CRC Press
Release Date : 2015-10-22
Category : Science
Total pages :566
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The environmental and climate program demands technological solutions in the chemical industry that incorporate prevention of pollution. Major advances are needed to reduce the use of organic solvents, such as methanol, toluene, xylene, methyl ethyl ketone, and dichloromethane, which account for 27 percent of total toxics release inventory chemical

Chemical Engineering Progress

Chemical Engineering Progress
Author : Anonim
Publisher : Unknown
Release Date : 2007
Category : Chemical engineering
Total pages :129
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Advances in Nanostructured Materials for Multifunctional Applications: Synthesis, Characterization and Properties

Advances in Nanostructured Materials for Multifunctional Applications: Synthesis, Characterization and Properties
Author : Luz Stella Gomez-Villalba
Publisher : Trans Tech Publications Ltd
Release Date : 2019-01-25
Category : Technology & Engineering
Total pages :168
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This volume presents the recent research progress in the synthesis, characterization techniques, properties and interactions of nanostructured materials for multifunctional applications. The opportunity to apply singular or hybrid nanomaterials proves to be a constant challenge in order to optimize its use, achieving simultaneous results for its application in different branches of research. It is focused on the study of structures and their effect on the properties of solids, using different experimental techniques and practical applications of nanostructured materials in the context of the latest achievements in the area of research of solid-state phenomena.

Bulletin of the Korean Chemical Society

Bulletin of the Korean Chemical Society
Author : Anonim
Publisher : Unknown
Release Date : 2009
Category : Chemistry
Total pages :129
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Self-assembled Nanostructured Materials

Self-assembled Nanostructured Materials
Author : Yunfeng Lu
Publisher : Unknown
Release Date : 2003
Category : Nanostructure materials
Total pages :394
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Nanostructures with critical dimensions less than 100nm endow materials with unique and often superior mechanical, electronic, magnetic and optical properties, which are expected to lead to numerous advanced applications. The current nanotechnology roadmap focuses on exploration and prediction of novel properties of materials at the nanoscale, of efficient synthesis and manufacture of nanoscale materials, and of the integration of nanoscale materials into real-world devices and applications. Self assembly, in which complex building blocks are organized into hierarchical structures via noncovalent interactions, has emerged as one of the most promising techniques for the efficient fabrication of nanostructured materials. This proceedings volume focuses on synthesis of novel nanostructured materials via self assembly, the fundamental understanding of self-assembly processes, the unique properties of nanostructured materials, and their potential applications. The volume is a compendium of current discussions of these topics with special emphasis on the synthesis and fabrication of nanostructured materials via self assembly of organic molecules such as surfactants and block copolymers, inorganic and metallic nanoclusters, nanoparticles, nanorods, nanowires, and other building blocks. It also contains reports on the novel properties and applications of nanostructured materials.

Dissertation Abstracts International

Dissertation Abstracts International
Author : Anonim
Publisher : Unknown
Release Date : 2008
Category : Dissertations, Academic
Total pages :129
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Green Sustainable Process for Chemical and Environmental Engineering and Science

Green Sustainable Process for Chemical and Environmental Engineering and Science
Author : Dr. Inamuddin,Rajender Boddula,Mohd Imran Ahamed,Abdullah M. Asiri
Publisher : Elsevier
Release Date : 2020-12-01
Category : Technology & Engineering
Total pages :298
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Green Sustainable Process for Chemical and Environmental Engineering and Science: Green Inorganic Synthesis provides an in-depth review of the synthesis of inorganic materials utilizing green chemistry protocols. It summarizes the green synthesis methods used for the preparation, processing and development of inorganic materials. The methods for the synthesis of various inorganic materials includes microwaves, sonochemical, electrochemical, bioinspired, enzyme mediated, sol-gel, solid state, etc. It also includes green-solvents driven inorganic material synthesis using ionic liquids, supercritical fluids, plant-derived materials, and microorganisms. The content of this book provides useful information which may be used to inspire the readers to new synthetic routes for sustainable inorganic synthesis. This book brings together panels of highly-accomplished experts in the field of inorganic chemistry. It is a unique book, extremely well structured and essential resource for undergraduate, postgraduate students, faculty, R&D professionals, production chemists, environmental engineers, and industrial experts. Essential study guide for inorganic chemical synthesis Provides a broad overview of eco-friendly methods in inorganic synthesis Bestows the latest advances in inorganic synthetic protocols Provides key references and details in each synthesis technique/methods Outlines eco-friendly inorganic synthesis and chemical processes using microwave, sonochemical and solid-state techniques

Diamond and Other New Carbon Materials IV

Diamond and Other New Carbon Materials IV
Author : P. Vincenzini,E. Cappelli
Publisher : Trans Tech Publications Ltd
Release Date : 2006-10-10
Category : Technology & Engineering
Total pages :182
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This collection presents 24 papers. Altogether, the collection offers a wealth of up-to-date information on Diamond and Other New Carbon Materials.