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Author: Mathias B. Gunther Publisher: ISBN: 9781604569797 Category : Catalysis Languages : en Pages : 0
Book Description
Heterogeneous catalysis is a chemistry term which describes catalysis where the catalyst is in a different phase (ie. solid, liquid and gas, but also oil and water) to the reactants. Heterogeneous catalysts provide a surface for the chemical reaction to take place on. In order for the reaction to occur, one or more of the reactants must diffuse to the catalyst surface and adsorb onto it. After reaction, the products must desorb from the surface and diffuse away from the solid surface. Frequently, this transport of reactants and products from one phase to another plays a dominant role in limiting the reaction rate. Understanding these transport phenomena and surface chemistry such as dispersion is an important area of heterogeneous catalyst research. Catalyst surface area may also be considered. Mesoporous silicates, for example, have found utility as catalysts because their surface areas may be in excess of 1000 m2/g, which increases the probability that a reactant molecule in solution will come in contact with the catalyst surface and adsorb. If diffusion rates are not taken into account, the reaction rates for various reactions on surfaces depend solely on the rate constants and reactant concentrations. Asymmetric heterogeneous catalysis can be used to synthesise enantiomerically pure compounds using chiral heterogeneous catalysts.[1] The field is of great industrial and environmental importance
Author: Mathias B. Gunther Publisher: ISBN: 9781604569797 Category : Catalysis Languages : en Pages : 0
Book Description
Heterogeneous catalysis is a chemistry term which describes catalysis where the catalyst is in a different phase (ie. solid, liquid and gas, but also oil and water) to the reactants. Heterogeneous catalysts provide a surface for the chemical reaction to take place on. In order for the reaction to occur, one or more of the reactants must diffuse to the catalyst surface and adsorb onto it. After reaction, the products must desorb from the surface and diffuse away from the solid surface. Frequently, this transport of reactants and products from one phase to another plays a dominant role in limiting the reaction rate. Understanding these transport phenomena and surface chemistry such as dispersion is an important area of heterogeneous catalyst research. Catalyst surface area may also be considered. Mesoporous silicates, for example, have found utility as catalysts because their surface areas may be in excess of 1000 m2/g, which increases the probability that a reactant molecule in solution will come in contact with the catalyst surface and adsorb. If diffusion rates are not taken into account, the reaction rates for various reactions on surfaces depend solely on the rate constants and reactant concentrations. Asymmetric heterogeneous catalysis can be used to synthesise enantiomerically pure compounds using chiral heterogeneous catalysts.[1] The field is of great industrial and environmental importance
Author: Vladislav A. Sadykov Publisher: Elsevier ISBN: 012814808X Category : Technology & Engineering Languages : en Pages : 590
Book Description
Advanced Nanomaterials for Catalysis and Energy: Synthesis, Characterization and Applications outlines new approaches to the synthesis of nanomaterials (synthesis in flow conditions, laser electrodispersion of single metals or alloys on carbon or oxide supports, mechanochemistry, sol-gel routes, etc.) to provide systems with a narrow particle size distribution, controlled metal-support interaction and nanocomposites with uniform spatial distribution of domains of different phases, even in dense sintered materials. Methods for characterization of real structure and surface properties of nanomaterials are discussed, including synchrotron radiation diffraction and X-ray photoelectron spectroscopy studies, neutronography, transmission/scanning electron microscopy with elemental analysis, and more. The book covers the effect of nanosystems' composition, bulk and surface properties, metal-support interaction, particle size and morphology, deposition density, etc. on their functional properties (transport features, catalytic activity and reaction mechanism). Finally, it includes examples of various developed nanostructured solid electrolytes and mixed ionic-electronic conductors as materials in solid oxide fuel cells and asymmetric supported membranes for oxygen and hydrogen separation. - Outlines synthetic and characterization methods for nanocatalysts - Relates nanocatalysts' properties to their specific applications - Proposes optimization methods aiming at specific applications
Author: Sachin Namdeo Kothawade Publisher: Walter de Gruyter GmbH & Co KG ISBN: 3111338495 Category : Science Languages : en Pages : 410
Book Description
Mesoporous silica comprehensively covers the importance and applications of mesoporous silica nanoparticles in the field of nanoscience and nanotechnology. The book delves into the synthesis and characterization of mesoporous silica nanoparticles, discussing various synthesis methods and characterization techniques employed in their production. It explores the properties and structure of mesoporous silica nanoparticles, including their porosity, surface area, structural features, and tunability. It discusses mechanical, thermal, and optical properties. The applications of mesoporous silica nanoparticles in drug delivery are covered in detail, focusing on controlled release systems, targeted drug delivery, and theranostic applications.The catalytic applications of mesoporous silica nanoparticles are examined, including the use of these nanoparticles as supported catalysts in catalytic reactions, with discussions on reaction mechanisms. The book also explores the sensing and biosensing applications of mesoporous silica nanoparticles, including optical and electrochemical sensing, bioanalytical applications, and detection of biomolecules and environmental pollutants. Surface functionalization techniques for mesoporous silica nanoparticles are discussed, highlighting the importance of tailoring their properties for specific applications. Biocompatibility and toxicity considerations are addressed, providing insights into the assessment of biocompatibility, toxicity evaluation, mitigation strategies, and regulatory considerations. The future directions and emerging trends in mesoporous silica nanoparticle research are explored, along with interdisciplinary approaches, challenges, and opportunities in the field. The book concludes by summarizing the key findings and discussing the overall significance of mesoporous silica nanoparticles in nanoscience and nanotechnology. The references section provides a comprehensive list of sources used throughout the book for further exploration. The book serves as an essential resource for researchers, professionals, and students interested in understanding the synthesis, characterization, properties, and diverse applications of mesoporous silica nanoparticles in the realm of nanoscience and nanotechnology.
Author: Vineet Kumar Publisher: CRC Press ISBN: 1000367207 Category : Technology & Engineering Languages : en Pages : 603
Book Description
Nanomaterials contain some unique properties due to their nanometric size and surface functionalization. Nanomaterial functionalization also affects their compatibility to biocompatibility and toxicity behaviors. environment and living organism. This makes functionalized nanomaterials a material with huge scope and few challenges. This book provides detailed information about the nanomaterial functionalization and their application. Recent advancements, challenges and opportunities in the preparation and applications of functionalized nanomaterials are also highlighted. This book can serve as a reference book for scientific investigators, doctoral and post-doctoral scholars; undergrad and grad. This book is very useful for multidisciplinary researchers, industry personnel’s, journalists, and policy makers. Features: Covers all aspects of Nanomaterial functionalization and its applications Describes and methods of functionalized nanomaterials synthesis for different applications Discusses the challenges, recent findings, and cutting-edge global research trends on functionalization of nanomaterials and its applications It discusses the regulatory frameworks for the safe use of functionalized nanomaterials. It contains contributions from international experts from multiple disciplines.
Author: Rakesh Kumar Sharma Publisher: World Scientific ISBN: 1786347482 Category : Science Languages : en Pages : 277
Book Description
Currently the field of nanocatalysis is undergoing many exciting developments and the design of silica-based organic-inorganic hybrid nanocatalysts is a key focus of the researchers working in this field.This book aims to present a succinct overview of the recent research progress directed towards the fabrication of silica-based organic-inorganic hybrid catalytic systems encompassing the key advantages of silica nanoparticles and silica-coated magnetic nanoparticles in an integrated manner. Featuring comprehensive descriptions of almost all approaches utilized for the synthesis of nanomaterials including some latest techniques such as flow and microwave-assisted synthesis that enable large-scale synthesis, it proves useful not only to academics but also industrialists. It also includes a systematic discussion on the vital characterization techniques employed for authenticating the structure of these.The title also offers an enormous amount of knowledge about the fusion of nanotechnology with green chemistry that strives to meet the scientific challenges of protecting human health and the environment.
Author: Wai-Yeung Wong Publisher: John Wiley & Sons ISBN: 3527347976 Category : Science Languages : en Pages : 564
Book Description
Functional Nanomaterials Presents the most recent advances in the production and applications of various functional nanomaterials As new synthetic methods, characterization technologies, and nanomaterials (NMs) with novel physical and chemical properties are developed, researchers and scientists across disciplines need to keep pace with advancements in the dynamic field. Functional Nanomaterials: Synthesis, Properties, and Applications provides comprehensive coverage of fundamental concepts, synthetic methods, characterization technologies, device fabrication, performance evaluation, and both current and emerging applications. Contributions from leading scientists in academia and industry present research developments of novel functional nanomaterials including metal nanoparticles, two-dimensional nanomaterials, perovskite-based nanomaterials, and polymer-based nanomaterials and nanocomposites. Topics include metal-based nanomaterials for electrochemical water splitting, cerium-based nanostructure materials for electrocatalysis, applications of rare earth luminescent nanomaterials, metal complex nanosheets, and methods for synthesizing polymer nanocomposites. Provides readers with timely and accurate information on the development of functional nanomaterials in nanoscience and nanotechnology Presents a critical perspective of the design strategy, synthesis, and characterization of advanced functional nanomaterials Focuses on recent research developments in emerging areas with emphasis on fundamental concepts and applications Explores functional nanomaterials for applications in areas such as electrocatalysis, bioengineering, optoelectronics, and electrochemistry Covers a diverse range of nanomaterials, including carbonaceous nanomaterials, metal-based nanomaterials, transition metal dichalcogenides-based nanomaterials, semiconducting molecules, and magnetic nanoparticles Functional Nanomaterials is an invaluable resource for chemists, materials scientists, electronics engineers, bioengineers, and others in the scientific community working with nanomaterials in the fields of energy, electronics, and biomedicine.
Author: Vineet Kumar Publisher: CRC Press ISBN: 1351021362 Category : Technology & Engineering Languages : en Pages : 370
Book Description
The functionalization of nanomaterials provides them with some unique properties, making the same nanomaterial amenable for various applications by simply manipulating functional components. However, functionalized nanomaterials also face some challenges, along with some encouraging new applications in the future. This book provides a detailed account of applications of the functionalization of nanomaterials. This book can serve as a reference book for scientific investigators, including doctoral and post-doctoral scholars and undergraduate and graduate students, in context with the scope of applications of functionalized nanomaterials. It also highlights recent advances, challenges, and opportunities in the application of nanomaterials. This book will provide critical and comparative data for nanotechnologists. It may also be beneficial for multidisciplinary researchers, industry personnel, journalists, policy makers, and the common public to understand the scope of functionalized nanomaterials in detail and in depth. Features: This book covers various applications of functionalized nanomaterials. It discusses recent global research trends and future applications of functionalized nanomaterials. It highlights the need for more rigorous regulatory frameworks for the safe use of functionalized nanomaterials. It contains contributions from international experts and will be a valuable resource for researchers.
Author: Peng Wu Publisher: John Wiley & Sons ISBN: 3527350942 Category : Technology & Engineering Languages : en Pages : 501
Book Description
Micro-Mesoporous Metallosilicates Up-to-date and in-depth text bridging the technology gap between fundamental research and industry-scale applications of porous materials for catalysis Micro-Mesoporous Metallosilicates: Synthesis, Characterization, and Catalytic Applications comprehensively introduces the chemistry and catalytic technologies of metallosilicates, an important family of microporous crystalline zeolite and heteroatom-containing mesoporous materials, with a primary focus on design synthesis, characterization, theoretical studies, and catalytic applications of titanosilicates, tin-silicates, germanosilicates and Ti-mesosilica, and more. The text covers recent advances in the synthesis of titanosilicates, including hydrothermal synthesis, dry-gel conversion, fluoride-assisted synthesis, and post-synthesis methods, along with the synthesis of metallosilicates with two-dimensional lamellar structures and their structural modifications as well as applications in selective oxidation reactions. The text also discusses synthesis of germanosilicates with specially designed organic structure-directing agents, synthesis and catalytic applications of heteroatom-containing mesoporous silica, and dendritic mesoporous silica nanoparticles with unique wrinkled center-radial structures. Overall, every important porous metallosilicate and its synthesis, characterization, pore engineering, catalytic application, and industrial technique and process are covered. Specific sample topics discussed in Micro-Mesoporous Metallosilicates include: Chemical post-modifications of titanosilicates, in terms of the effects on transfer, adsorption/desorption, and surface reactions X-Ray based techniques, ultraviolet-visible-near infrared spectroscopy, Raman spectroscopy, and solid-state NMR spectroscopy Theoretical calculation as an effective tool and supplement to understand the catalytic active center, structural character, and Brønsted/Lewis acidity Titanosilicates in the liquid-phase epoxidation reaction of propylene and propylene chloride to corresponding epoxides Effects of particle sizes, oxidation state, and location sites of Au nanoparticles, and epoxidation performance of Ti-containing materials Delivering cutting-edge research and bridging the technology gap between fundamental research and industrial applications, Micro-Mesoporous Metallosilicates is a valuable resource for chemists, materials scientists, chemical engineers, and experienced researchers in related fields.
Author: Suvardhan Kanchi Publisher: John Wiley & Sons ISBN: 1119418860 Category : Technology & Engineering Languages : en Pages : 705
Book Description
This groundbreaking book uniquely focuses on the exploration of the green synthesis of metal nanoparticles and their characterization and applications. Metal nanoparticles are the basic elements of nanotechnology as they are the primary source used in the design of nanostructured devices and materials. Nanomaterials can be manufactured either incidentally, with physical or chemical methods, or naturally; and the high demand for them has led to their large-scale production by various toxic solvents or high energy techniques. However, due to the growing awareness of environmental and safety issues, the use of clean, nontoxic and environment-friendly ways to synthesize metal nanoparticles has emerged out of necessity. The use of biological resources, such as microbes, plant parts, vegetable wastes, agricultural wastes, gums, etc., has grown to become an alternative way of synthesizing metal nanoparticles. This biogenic synthesis is green, environmentally friendly, cost-effective, and nontoxic. The current multi-authored book includes recent information and builds a database of bioreducing agents for various metal nanoparticles using different precursor systems. Green Metal Nanoparticles also highlights different simple, cost-effective, environment-friendly and easily scalable strategies, and includes parameters for controlling the size and shape of the materials developed from the various greener methods.
Author: Mathias B. Gunther
Author: Mathias B. Gunther
Author: Vladislav A. Sadykov
Author: Sachin Namdeo Kothawade
Author: Vineet Kumar
Author: Rakesh Kumar Sharma
Author: Wai-Yeung Wong
Author: Chaudhery Mustansar Hussain
Author: Vineet Kumar
Author: Peng Wu
Author: Suvardhan Kanchi