Download or read book Progress Towards the Synthesis of Shaped Palladium silver Nanoparticles and Their Catalytic Applications for Selective Hydrogenation written by Haeyoon Jung and published by . This book was released on 2018 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Optimization of Several One pot Syntheses of Shape Palladium silver Nanoparticles and Preliminary Catalytic Studies on Their Selective Hydrogenation of 1 hexyne written by Claire Jing Jing Wang and published by . This book was released on 2021 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Silver Nanoparticles Synthesis Functionalization and Applications written by Parteek Prasher and published by Bentham Science Publishers. This book was released on 2022-03-14 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silver Nanoparticles: Synthesis, Functionalization and Applications presents detailed information about the range of methods of synthesizing silver nanoparticles (AgNPs). The book systematically delves into the subject with an introductory chapter before moving to chemical synthesis of AGnPs and fabrication methods which help in assigning functional properties for useful nanomaterials. Basic and advanced synthetic methods like surface functionalization and bioconjugation are covered. Additionally, the book informs about impactful applications of AGNPs across a range of industries. Through this book, readers will be able to understand the importance of silver nanoparticles as a futuristic material in scientific investigations and gain a comprehensive understanding of the operational strategies revolving around their surface modification and conjugation. Key Features: -Covers the basics of silver nanoparticle (AGNP) synthesis -Focuses on green methods of AGNPs - Covers information about surface modification and functionalization of AGNPs with different molecules (including biomolecules) -Covers a range of applications of AGNPs -Includes advanced applications of AGNPs in next-generation antibiotics Silver Nanoparticles: Synthesis, Functionalization and Applications a handy reference for scholars in advanced chemical engineering, materials science and pharmacology programs as well as anyone who wants to know all about silver nanoparticles.
Download or read book Metal Nanoparticles written by Daniel L. Fedlheim and published by CRC Press. This book was released on 2001-10-26 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: A state-of-the-art reference, Metal Nanoparticles offers the latest research on the synthesis, characterization, and applications of nanoparticles. Following an introduction of structural, optical, electronic, and electrochemical properties of nanoparticles, the book elaborates on nanoclusters, hyper-Raleigh scattering, nanoarrays, and several applications including single electron devices, chemical sensors, biomolecule sensors, and DNA detection. The text emphasizes how size, shape, and surface chemistry affect particle performance throughout. Topics include synthesis and formation of nanoclusters, nanosphere lithography, modeling of nanoparticle optical properties, and biomolecule sensors.
Download or read book Selectivity in Catalysis written by Mark E. Davis and published by . This book was released on 1993 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses recent research and provides tutorial chapters on enhancing selectivity in catalysis through stereoselectivity, reaction pathway control, shape selectivity, and alloys and clusters. Presents an interdisciplinary approach to increasing selectivity in homogeneous and heterogeneous catalysis research. Includes an overview chapter that discusses the current state of the field and offers a perspective on future directions.
Download or read book The Synthesis of Randomly Alloyed Palladium silver Nanoparticles for the Catalytic Treatment of Aqueous Nitrite written by Jacob Preston Troutman and published by . This book was released on 2019 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrate (NO3-), and its daughter compound nitrite (NO2-), are two of the most prevalent contaminants in drinking water. Catalytic degradation of NO3- and NO2- provides a treatment method with a small environmental footprint, though it is currently hindered by the need for a catalytic system that pairs reduced costs with enhanced activity and longevity. Monodisperse, randomly-alloyed palladium–silver nanoparticles (Pd [subscript X] Ag [subscript 100-X] NPs) with tunable compositions (X = 50–95) were studied for use as catalysts in aqueous NO2- reduction. The synthesized Pd [subscript X] Ag [subscript 100-X] NPs were supported on amorphous silica (SiO2) and studied for use as aqueous NO2- reduction catalysts in batch reactors with H2 gas as the electron donor. Nitrite reduction followed pseudo-first-order reaction kinetics for ≥80% conversion, and displayed a high selectivity (>98%) for nitrogen gas (N2) as the end product. Nearly all compositions displayed increased activity over pure PdNPs supported on amorphous SiO2. Catalyst longevity was assessed for the most active catalyst. Throughout recycling, the catalytic activity decreased, although complementary analysis indicated no major physical changes of the catalyst. Overall, this work demonstrates that incorporating inexpensive, semi-noble metals into bimetallic alloys is a potential avenue for increasing catalytic activity while decreasing catalyst cost for NO2- reduction
Download or read book Palladium as a Catalyst for Selective Hydrogenation written by Takht Ravanchi Maryam and published by LAP Lambert Academic Publishing. This book was released on 2015-10-15 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: The selective hydrogenation of multi-unsaturated hydrocarbons, especially in pyrolysis products, to corresponding mono-olefins is a widely exploited way for large-scale production of polymer-grade olefins and also upgrading of gasoline blending stocks. Thermodynamic and/or kinetic parameters could be responsible for directing the reaction network to a special product. This book deals with application of palladium-based catalysts in selective hydrogenation of alkynes and diens. It covers both fundamental and applied aspects of selective hydrogenation with special emphasis on the selectivity problem. The book is organized in rational way beginning with the electronic structure of palladium, followed by its catalytic properties, interaction with supports and transport limitations and commercial applications.
Download or read book Creation of New Metal Nanoparticles and Their Hydrogen Storage and Catalytic Properties written by Kohei Kusada and published by Springer. This book was released on 2014-07-16 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports the discovery of metal nanoparticles having new structures that do not exist in bulk state and that exhibit hydrogen storage ability or CO oxidation activity. Research into the reaction of hydrogen with metals has attracted much attention because of potential applications as effective hydrogen storage materials, as permeable films, or as catalysts for hydrogenation. Also, CO oxidation catalysts have been extensively developed because of their importance to CO removal from car exhaust or fuel-cell systems. At the same time, atomic-level (solid solution) alloying has the advantage of being able to continuously control chemical and physical properties of elements by changing compositions and/or combinations of constituent elements. This thesis provides a novel strategy for the basis of inter-elemental fusion to create highly efficient functional materials for energy and material conversions.
Download or read book Palladium in Organic Synthesis written by Jiro Tsuji and published by Springer Science & Business Media. This book was released on 2005-07-06 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: with contributions by numerous experts
Download or read book Electrochemical Biosensors written by Serge Cosnier and published by CRC Press. This book was released on 2015-01-26 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since four decades, rapid detection and monitoring in clinical and food diagnostics and in environmental and biodefense have paved the way for the elaboration of electrochemical biosensors. Thanks to their adaptability, ease of use in relatively complex samples, and their portability, electrochemical biosensors now are one of the mainstays of analy
Download or read book Nanocatalysis written by Vivek Polshettiwar and published by John Wiley & Sons. This book was released on 2013-09-06 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exhibiting both homogeneous and heterogeneous catalytic properties, nanocatalysts allow for rapid and selective chemical transformations, with the benefits of excellent product yield and ease of catalyst separation and recovery. This book reviews the catalytic performance and the synthesis and characterization of nanocatalysts, examining the current state of the art and pointing the way towards new avenues of research. Moreover, the authors discuss new and emerging applications of nanocatalysts and nanocatalysis, from pharmaceuticals to fine chemicals to renewable energy to biotransformations. Nanocatalysis features contributions from leading research groups around the world. These contributions reflect a thorough review of the current literature as well as the authors’ first-hand experience designing and synthesizing nanocatalysts and developing new applications for them. The book’s nineteen chapters offer a broad perspective, covering: Nanocatalysis for carbon-carbon and carbon-heteroatom coupling reactions Nanocatalysis for various organic transformations in fine chemical synthesis Nanocatalysis for oxidation, hydrogenation, and other related reactions Nanomaterial-based photocatalysis and biocatalysis Nanocatalysts to produce non-conventional energy such as hydrogen and biofuels Nanocatalysts and nano-biocatalysts in the chemical industry Readers will also learn about the latest spectroscopic and microscopy tools used in advanced characterization methods that shed new light on nanocatalysts and nanocatalysis. Moreover, the authors offer expert advice to help readers develop strategies to improve catalytic performance. Summarizing and reviewing all the most important advances in nanocatalysis over the last two decades, this book explains the many advantages of nanocatalysts over conventional homogeneous and heterogeneous catalysts, providing the information and guidance needed for designing green, sustainable catalytic processes.
Download or read book Strategies for Palladium Catalyzed Non directed and Directed C bond H Bond Functionalization written by Anant R. Kapdi and published by Elsevier. This book was released on 2017-05-23 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strategies for Palladium-Catalyzed Non-directed and Directed C-H Bond Functionalization portrays the complete scope of these two aspects of C-H bond functionalization in a single volume for the first time. Featured topics include the influence of palladacyclic systems in C-H bond functionalization (need for newer catalytic systems for better efficiency), mechanistic aspect of the functionalization strategies leading to better systems, and applications of these methodologies to natural product synthesis and material synthesis. Addresses the involvement of catalytic systems (palladacycles) for better functionalization of (hetero)arenes to emphasize the need for developing better, more selective systems Covers the use of powerful mechanistic tools for understanding and assisting the development of better functionalization strategies Discusses the finer aspects of C-H bond functionalization, such as control of regioselectivity with or without directing groups Includes a chapter detailing the synthesis of naturally occurring molecules or functional molecules via both pathways for assessing the applicability of the functionalization strategies
Download or read book Synthesis of Shaped Palladium Nanoparticles Attached to Graphitic Carbon as Catalysts for the Suzuki coupling Reaction written by Christopher Michael Kruppe and published by . This book was released on 2013 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unsupported Thiolate capped Palladium Nanoparticles as Selective Hydrogenation Catalysts written by Jie S. Zhu and published by . This book was released on 2019 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The reactions of palladium are invaluable to modern academic and industrial research, and nanotechnology is the foundation on which the next generation of materials is built upon. Unsupported thiolate-capped palladium nanoparticles were found to be highly substrate selective for alkene hydrogenation and isomerization. A modified Brust-Schiffrin reaction enabled the facile and convenient synthesis of a diverse set of ultra-small thiolate-capped nanoparticles. The physical properties of these nanoparticles were highly tunable due to the widespread availability of ligand precursors. Mechanistic evidence and insights reveal that steric and electronic effects from the ligand environment on the nanoparticle surface controlled reactivity by influencing alkene adsorption via [pi] bond coordination or di-[sigma] bond formation. Only alkenes close enough to the metal surface of the nanoparticles underwent reaction. Dienes with good overlapping p orbitals could overcome these steric effects on the deactivated palladium nanoparticle surfaces. A mechanistic model was built from these completed studies, and this model can be used to predict the selectivity of hydrogenation or isomerization in multiple classes of alkenes with varied substitution patterns. These palladium nanoparticles were also found to be capable of chemoselective alkene hydrogenation in the presence of functional groups that are known to be labile towards reduction by palladium.
Download or read book Palladium and Nickel Catalyzed Transformations Forming Functionalized Heterocycles written by Hyung Yoon and published by Springer Nature. This book was released on 2020-09-02 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents Pd- and Ni-catalyzed transformations generating functionalized heterocycles. Transition metal catalysis is at the forefront of synthetic organic chemistry since it offers new and powerful methods to forge carbon–carbon bonds in high atom- and step-economy. In Chapter 1, the author describes a Pd- and Ni-catalyzed cycloisomerization of aryl iodides to alkyl iodides, known as carboiodination. In the context of the Pd-catalyzed variant, the chapter explores the production of enantioenriched carboxamides through diastereoselective Pd-catalyzed carboiodination. It then discusses Ni-catalyzed reactions to generate oxindoles and an enantioselective variant employing a dual ligand system. Chapter 2 introduces readers to a Pd-catalyzed diastereoselective anion-capture cascade. It also examines diastereoselective Pd-catalyzed aryl cyanation to synthesize alkyl nitriles, a method that generates high yields of borylated chromans as a single diastereomer, and highlights its synthetic utility. Lastly, Chapter 3 presents a Pd-catalyzed domino process harnessing carbopalladation, C–H activation and π-system insertion (benzynes and alkynes) to generate spirocycles. It also describes the mechanistic studies performed on these reactions.
Download or read book Characterization and Catalytic Applications of Silver Nanoparticles Supported on Hierarchically Porous SiO 2 and Co 3O 4 Monoliths written by Yasemin Yildirim and published by . This book was released on 2017 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hierarchically porous materials are of great interest in such applications as catalysis, drug delivery, chromatography, and electrochemical sensor arrays due to properties such as high surface area, large void volume, and tunable surface chemistry. In this study, we give the detailed report of the synthesis of supported Ag nanoparticles by nanocasting on to hierarchically porous SiO2 (silica) and Co3O4 (cobalt oxide) monoliths, as well as the use of these materials as heterogeneous catalysts for the hydrogenation and oxidation reactions. In the preliminary work, we investigated the synthesis of Ag supported on hierarchically porous SiO2 and Co3O4 monoliths, and the catalytic activity of these monoliths for the hydrogenation of MB (methylene blue) and MO (methyl orange) dyes in the presence of NaBH4 (sodium borohydride). The SiO2 monoliths were synthesized using a sol-gel technique. The Co3O4 monoliths were prepared by nanocasting, using the SiO2 monoliths as a template. The loading of Ag nanoparticles on the SiO2 and Co3O4 monoliths was done by a solution infiltration method using aqueous AgNO3 (silver nitrate) solution followed by reduction with ethylene glycol and hydrazine hydrate. Such monoliths also were used as continuous flow monolithic microreactors for the catalytic activity and stability studies for the hydrogenation of EO (eosin-Y) dye in the presence of NaBH4. Finally, the use of these monoliths for the oxidation of cyclohexene was investigated including the effects of temperature, oxidant, catalyst loading, and substrate to oxidant ratio. All these studies are presented in different sections depending on the different synthesis, procedures, and catalytic activity occurring in each heterogeneous catalyst.
Download or read book 1 Aqueous Solution Synthesis of Palladium Nanocrystals with Systematic Shape Evolution and Their Facet Dependent Catalytic Activity 2 One Pot Synthesis of Copper Nanoparticles in Aqueous Solution written by 劉淑雅 and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
