Download or read book Photocatalysis Studies Using Mesoporous Modified V MCM 48 Stober Synthesis Acetaldehyde Carbon Monoxide Ethanol Acetone 2 propanol Acetonitrile written by Luther James Mahoney and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Although Degussia-Huls P-25 TiO[subscript]2 semiconductor photocatalyst has high photodegradation rate for organic molecules, it works only under ultra-violet (UV) light. Mesoporous metal doped V-MCM-48 silica was synthesized under ambient conditions for use as a visible-light photocatalyst to convert toxic probe molecules to innocuous products: CO[subscript]2 + H[subscript]2O. The synthesis employed a modified Stober metal doped MCM-48 silica method. Powder X-ray diffraction (XRD), diffuse-reflectance-ultra-violet-visible (DR-UV-vis) spectroscopy, and N[subscript]2 adsorption-desorpton analysis characterization methods were completed on V-MCM-48 mesoporous material. These characterization methods indicate V-MCM-48 structure had formed with visible light absorption and mesoporous properties. Photocatalysis studies were completed with V-MCM-48 under dark, visible, and UV-light illumination conditions for the following probe molecules: acetaldehyde, carbon monoxide, ethanol, acetone, 2-propanol, and acetonitrile. Acetaldehyde over V-MCM-48 was converted to CO[subscript]2 under dark, visible, and UV-light conditions. Carbon monoxide photooxidation occurred over V-MCM-48 under visible and UV-light. Ethanol and acetonitrile had smaller photodegradation activity over V-MCM-48. Acetone and 2-propanol had no activity photocatalytically. Under dark and visible light illumination, V-MCM-48 consumed approximately one-half acetaldehyde and produced one-third CO[subscript]2 concentration as compared with the P-25 TiO[subscript]2 under UV-light. V-MCM-48 produced two-thirds of the amount of CO[subscript]2 in comparison to nanoparticle Au/ZnO catalyst under UV-light. The results infer V-MCM-48 might be useful in gas and liquid phase photocatalysis including water-splitting due to a high oxidation state (V[superscript]5+), visible light absorption, and high surface area. In conclusion, an extended literature review has been completed and literature employed extensively throughout the thesis with potential methods to further the research on V-MCM-48/Si-MCM-48 in catalysis, chromatography, adsorption/gas separation, and solar collection/water-splitting.
Download or read book Heterogeneous Photocatalysis written by Juan Carlos Colmenares and published by Springer. This book was released on 2015-12-24 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book explains the principles and fundamentals of photocatalysis and highlights the current developments and future potential of the green-chemistry-oriented applications of various inorganic, organic, and hybrid photocatalysts. The book consists of eleven chapters, including the principles and fundamentals of heterogeneous photocatalysis; the mechanisms and dynamics of surface photocatalysis; research on TiO2-based composites with unique nanostructures; the latest developments and advances in exploiting photocatalyst alternatives to TiO2; and photocatalytic materials for applications other than the traditional degradation of pollutants, such as carbon dioxide reduction, water oxidation, a complete spectrum of selective organic transformations and water splitting by photocatalytic reduction. In addition, heterogeneized polyoxometalate materials for photocatalytic purposes and the proper design of photocatalytic reactors and modeling of light are also discussed. This book appeals to a wide readership of the academic and industrial researchers and it can also be used in the classroom for undergraduate and graduate students focusing on heterogeneous photocatalysis, sustainable chemistry, energy conversion and storage, nanotechnology, chemical engineering, environmental protection, optoelectronics, sensors, and surface and interface science. Juan Carlos Colmenares is a Professor at the Institute of Physical Chemistry, Polish Academy of Sciences, Poland. Yi-Jun Xu is a Professor at the State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, China.
Download or read book Photocatalytic Reaction Engineering written by Hugo de Lasa and published by Springer Science & Business Media. This book was released on 2005-05-05 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heterogeneous photocatalysis is a novel technique for water purification. Publications on photocatalysis span a relatively recent period of not more than 25 years. This is a technique that, according to our extensive experience on the development of laboratory scale and pilot plant units, has great promise to eliminate water and air pollutants. Photocatalysis offers much more than competitive techniques where pollutants are transferred from phases; photocatalysis can achieve complete mineralization of pollutants leaving non-toxic species such as CO2 and H2O and can be exploited at close to room temperature and ambient pressure.
Download or read book Computational Photocatalysis written by Dmitri Kilin and published by . This book was released on 2019 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains sequences that illustrate various technology-based science topics.
Download or read book Morphology Control of Materials and Nanoparticles written by Yoshio Waseda and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first major compilation of new advances covering the current status and topics related to the processing and production of precisely controlled materials. It provides a unique source of information and guidance for specialists and non-specialists alike. This book represents an extended introductory treatise on the fundamental aspects, new methods for the precise control of morphology (size, shape, composition, structure etc.) and accurate materials characterization, from both the basic science and the applied engineering viewpoints.
Download or read book Graphite and Precursors written by Pierre Delhaes and published by CRC Press. This book was released on 2000-12-21 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Humans first used carbon as chars from firewood in ritual paintings and primitive metallurgical processes. Natural forms of carbon have been known since antiquity, yet the knowledge of the carbon element in chemistry and its technical applications on a larger scale are a relatively recent development. The industrial revolution in Europe two centuries ago led the way to the numerous applications of these graphitic forms that are still used today. Graphite and Precursors features short tutorial articles on different topics related to the science and technology of carbons intended for engineers, students of Materials Science and scientists who are seeking a fundamental understanding without "reinventing the wheel." This first volume of the World of Carbon book series focuses on graphite and its precursors, including its origin and various implications. The basic properties of hexagonal graphite are developed, and several theoretical and experimental approaches explain why this crystalline solid is fascinating in solid state physics. Also featured are the numerous applications connected to thermal, mechanical and chemical graphites, as well as their various industrial uses in polycrystalline form. Finally, carbon precursors are introduced.
Download or read book Applied Nanotechnology written by Vladimir Ivanovitch Kodolov and published by CRC Press. This book was released on 2016-12-08 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: This important book presents a collection of scientific papers on recent theoretical and practical advances in nanostructures, nanomaterials, and nanotechnologies. Highlighting some of the latest developments and trends in the field, the volume presents the developments of advanced nanostructured materials and the respective tools to characterize and predict their properties and behavior.
Download or read book Handbook of Gas Sensor Materials written by Ghenadii Korotcenkov and published by Springer Science & Business Media. This book was released on 2013-09-18 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two volumes of Handbook of Gas Sensor Materials provide a detailed and comprehensive account of materials for gas sensors, including the properties and relative advantages of various materials. Since these sensors can be applied for the automation of myriad industrial processes, as well as for everyday monitoring of such activities as public safety, engine performance, medical therapeutics, and in many other situations, this handbook is of great value. Gas sensor designers will find a treasure trove of material in these two books.
Download or read book Cascade Biocatalysis written by Sergio Riva and published by John Wiley & Sons. This book was released on 2014-06-23 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: This ready reference presents environmentally friendly and stereoselective methods of modern biocatalysis. The experienced and renowned team of editors have gathered top international authors for this book. They cover such emerging topics as chemoenzymatic methods and multistep enzymatic reactions, while showing how these novel methods and concepts can be used for practical applications. Multidisciplinary topics, including directed evolution, dynamic kinetic resolution, and continuous-flow methodology are also discussed. From the contents: * Directed Evolution of Ligninolytic Oxidoreductases: from Functional Expression to Stabilization and Beyond * New Trends in the In Situ Enzymatic Recycling of NAD(P)(H) Cofactors * Monooxygenase-Catalyzed Redox Cascade Biotransformations * Biocatalytic Redox Cascades Involving w-Transaminases * Multi-Enzyme Systems and Cascade Reactions Involving Cytochrome P450 Monooxygenases * Chemo-Enzymatic Cascade Reactions for the Synthesis of Glycoconjugates * Synergies of Chemistry and Biochemistry for the Production of Beta-Amino Acids * Racemizable Acyl Donors for Enzymatic Dynamic Kinetic Resolution * Stereoselective Hydrolase-Catalyzed Processes in Continuous-Flow Mode * Perspectives on Multienzyme Process Technology * Nitrile Converting Enzymes Involved in Natural and Synthetic Cascade Reactions * Mining Genomes for Nitrilases * Key-Study on the Kinetic Aspects of the In-Situ NHase/AMase Cascade System of M. imperiale Resting Cells for Nitrile Bioconversion * Enzymatic Stereoselective Synthesis of Beta-Amino Acids * New Applications of Transketolase: Cascade Reactions for Assay Development * Aldolases as Catalyst for the Synthesis of Carbohydrates and Analogs * Enzymatic Generation of Sialoconjugate Diversity * Methyltransferases in Biocatalysis * Chemoenzymatic Multistep One-Pot Processes
Download or read book Supported Ionic Liquids written by Rasmus Fehrmann and published by John Wiley & Sons. This book was released on 2014-03-24 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book gives a timely overview about the fundamentals and applications of supported ionic liquids in modern organic synthesis. It introduces the concept and synthesis of SILP materials and presents important applications in the field of catalysis (e.g. hydroformylation, hydrogenation, coupling reactions, fine chemical synthesis) as well as energy technology and gas separation. Written by pioneers in the field, this book is an invaluable reference book for organic chemists in academia or industry.
Download or read book Polymer Science and Nanotechnology written by Ravin Narain and published by Elsevier. This book was released on 2020-06-16 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer Science and Nanotechnology: Fundamentals and Applications brings together the latest advances in polymer science and nanoscience. Sections explain the fundamentals of polymer science, including key aspects and methods in terms of molecular structure, synthesis, characterization, microstructure, phase structure and processing and properties before discussing the materials of particular interest and utility for novel applications, such as hydrogels, natural polymers, smart polymers and polymeric biomaterials. The second part of the book examines essential techniques in nanotechnology, with an emphasis on the utilization of advanced polymeric materials in the context of nanoscience. Throughout the book, chapters are prepared so that materials and products can be geared towards specific applications. Two chapters cover, in detail, major application areas, including fuel and solar cells, tissue engineering, drug and gene delivery, membranes, water treatment and oil recovery. Presents the latest applications of polymers and polymeric nanomaterials, across energy, biomedical, pharmaceutical, and environmental fields Contains detailed coverage of polymer nanocomposites, polymer nanoparticles, and hybrid polymer-metallic nanoparticles Supports an interdisciplinary approach, enabling readers from different disciplines to understand polymer science and nanotechnology and the interface between them
Download or read book Nanocrystalline Ceramics written by Markus Winterer and published by Springer Science & Business Media. This book was released on 2002-08-21 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanocrystalline materials is the name given to three-dimensional ultrafine, polycrystalline microstructures. These microstructures give rise to chemical and physical size effects which are of increasing scientific and technological interest. This book describes the development of a chemical vapor synthesis method for the production of nanocrystalline ceramic powders. The development of the microstructure during sintering is studied and the influence of the synthesis parameters on the structure and properties of the nanocrystalline ceramics from the atomic to the microstructural level is investigated. The emerging unified view, from powder synthesis and ceramic processing to structural characterization and determination of properties, provides a detailed understanding of nanocrystalline materials and enables a precise control of the quality of the final products.
Download or read book Semiconductor Laser Fundamentals written by Toshiaki Suhara and published by CRC Press. This book was released on 2004-03-16 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ranging from fundamental theoretical concepts to advanced device technologies, this reference/text explores the engineering, characteristics, and performance of specific semiconductor lasers. It defines key principles in electromagnetics, optoelectronics, and laser implementation for novel applications in optical communications, storage, processing
Download or read book Applied Homogeneous Catalysis written by Arno Behr and published by John Wiley & Sons. This book was released on 2012-04-16 with total page 717 pages. Available in PDF, EPUB and Kindle. Book excerpt: Auf fortgeschrittenem Niveau und mit didaktischem Anspruch bietet Ihnen dieser Band zahlreiche Fragen mit Antworten und eine breite Palette von Fallstudien aus der Industrie, ergänzt durch weiterführende Literaturhinweise und Referenzen der Originalliteratur. Insbesondere geht es um die modernsten katalytischen Prozesse mit ihren Anwendungen in der Pharmazie und der Feinchemikalien-Industrie, wobei auch kommerzielle Aspekte besprochen werden. Der Autor, ein erfahrener Dozent mit Industriepraxis, legt Chemikern und Chemieingenieuren damit ein praxistaugliches Hilfsmittel vor.
Download or read book The Chemistry of Transition Metal Carbides and Nitrides written by S.T. Oyama and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book arose from a symposium titled 'Transition Metal Carbides and Nitrides: Preparation, Properties, and Reactivity' organized by Jae Sung Lee, Masatoshi Nagai and myself. The symposium was part of the 1995 Congress of Pacific Rim Chemical Societies, held in Honolulu, Hawaii between December 17-22, 1995. The meeting was the first major conference to exclusively address the theme of metal carbides and nitrides, and brought together many of the major researchers in the field. Over 50 scientists and engineers reported their latest findings in five sessions of presentations and discussions. The book closely follows the topics covered in the conference: Theory of bonding Structure and composition Catalytic properties Physical properties New methods of preparation Spectroscopy and microscopy The book is unique in its coverage. It provides a general introduction to the properties and nature of the materials, but also covers their latest applications in a wide variety of fields. It should thus be of interest to both experts and nonexperts in the fields of material science, solid-state chemistry, physics, ceramics engineering, and catalysis. The first chapter gives an overview, and many of the chapters provide summaries of advanced topics. All contributions were peer-reviewed.
Download or read book Smart Nanoparticles Technology written by Abbass A. Hashim and published by BoD – Books on Demand. This book was released on 2012-04-18 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last few years, Nanoparticles and their applications dramatically diverted science in the direction of brand new philosophy. The properties of many conventional materials changed when formed from nanoparticles. Nanoparticles have a greater surface area per weight than larger particles which causes them to be more reactive and effective than other molecules. In this book, we (InTech publisher, editor and authors) have invested a lot of effort to include 25 most advanced technology chapters. The book is organised into three well-heeled parts. We would like to invite all Nanotechnology scientists to read and share the knowledge and contents of this book.
Download or read book Novel Approaches in Biosensors and Rapid Diagnostic Assays written by Zvi Liron and published by Springer Science & Business Media. This book was released on 2001-10-31 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the medical, food, and environmental fields there is a continuous demand for inexpensive and sensitive analytical devices that are reliable, rapid, capable of high-throughput screening, and have low cost per test unit. Small and portable biosensor devices are designed to fulfill most of these requirements, and can be used in laboratory and on-site field testing. This volume discusses major issues in optical, acoustic and electrochemical-based biosensors, biochips, sensing recognition elements, and biosensors for medical and environmental applications. The papers presented at the conference represent basic and applied research studies in the fields of diagnostic assays and biosensor development. Novel technologies, such as arrays of sensors using high-density fiber optics to sense labeled or unlabeled oligonucleotides, and patterned arrays of recognition elements, demonstrated the capability of biosensors to analyze multiple analytes.
