Synthesis of Nanostructured Materials in Near and/ or Supercritical Fluids Books

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Synthesis of Nanostructured Materials in Near and or Supercritical Fluids


Synthesis of Nanostructured Materials in Near and or Supercritical Fluids
  • Author : Can Erkey
  • Publisher : Elsevier
  • Release : 2021-08-15
  • ISBN : 0444640894
  • Language : En, Es, Fr & De
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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

Synthesis of Nanostructured Materials in Near and or Supercritical Fluids


Synthesis of Nanostructured Materials in Near and or Supercritical Fluids
  • Author : Can Erkey
  • Publisher : Elsevier
  • Release : 2021-08-01
  • ISBN : 9780444640901
  • Language : En, Es, Fr & De
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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 : 2011
  • ISBN : 9780080453293
  • Language : En, Es, Fr & De
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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

Green Sustainable Process for Chemical and Environmental Engineering and Science


Green Sustainable Process for Chemical and Environmental Engineering and Science
  • Author : Dr. Inamuddin
  • Publisher : Elsevier
  • Release : 2020-12-01
  • ISBN : 9780128218990
  • Language : En, Es, Fr & De
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Green Sustainable Process for Chemical and Environmental Engineering and Science: Solvents for the Pharmaceutical Industry aims at providing a detailed overview of applications of green solvents in pharmaceutical industries. It also focuses on providing a detailed literature survey on the green solvents for pharmaceutical analysis, drug design, synthesis, and production, etc. It summarizes the applications of various greens solvents such as water, cyrene, vegetable oils, ionic liquids, ethyl lactate, eutectic solvents, and glycerol in contrast to toxic solvents. This book provides an overview of the use of green solvents for the sustainable and environmentally friendly development of synthetic methodologies for biomedical and pharmaceutical industries. Up-to-date developments towards the development of solvents for pharmaceutical industry Includes latest advances in pharmaceutical analysis and synthesis using green solvents Outlines eco-friendly green solvents for medicinal applications State-of-the-art overview on the exploration of green solvents for pharmaceutical industries

Synthesis of Nanostructured Materials by Etching in Supercritical Carbon Dioxide


Synthesis of Nanostructured Materials by Etching in Supercritical Carbon Dioxide
  • Author :
  • Publisher :
  • Release : 2009
  • ISBN : OCLC:659752039
  • Language : En, Es, Fr & De
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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.