Synthesis, Characterization and Catalytic Activity of Chiral Mesoporous Silica for Asymmetric Reaction PDF Download
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Author: Syaidatul Shafiqah Yusrirohani
Publisher:
ISBN:
Category : Silica
Languages : en
Pages : 110
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Book Description
Author: Syaidatul Shafiqah Yusrirohani
Publisher:
ISBN:
Category : Silica
Languages : en
Pages : 110
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Book Description
Author: Hermenegildo Garcia
Publisher: John Wiley & Sons
ISBN: 3527350896
Category :
Languages : en
Pages : 501
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Book Description
Understanding the synthesis and applications of porous solid catalysts Heterogeneous catalysis is a catalytic process in which catalysts and reactants exist in different phases. Heterogeneous catalysis with solid catalysts proceeds through the absorption of substrates and reagents which are liquid or gas, and this is largely dependent on the accessible surface area of the solid which can generate active reaction sites. The synthesis of porous solids is an increasingly productive approach to generating solid catalysts with larger accessible surface area, allowing more efficient catalysis. Catalysis in Confined Frameworks: Synthesis, Characterization, and Applications provides a comprehensive overview of synthesis and use of porous solids as heterogeneous catalysts. It provides detailed analysis of pore engineering, a thorough characterization of the advantages and disadvantages of porous solids as heterogeneous catalysts, and an extensive discussion of applications. The result is a foundational introduction to a cutting-edge field. Catalysis in Confined Frameworks: Synthesis, Characterization, and Applications readers will also find: An editorial team comprised of international experts with extensive experience Detailed discussion of catalyst classes including zeolites, mesoporous aluminosilicates, and more A special focus on size selective catalysis Catalysis in Confined Frameworks: Synthesis, Characterization, and Applications is an essential reference for catalytic chemists, organic chemists, materials scientists, physical chemists, and any researchers or industry professionals working with heterogeneous catalysis.
Author: Peng Wu
Publisher: John Wiley & Sons
ISBN: 3527350942
Category : Technology & Engineering
Languages : en
Pages : 501
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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: Samantha Ranaweera
Publisher:
ISBN:
Category :
Languages : en
Pages : 186
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Book Description
Stable dinuclear complexes bis(heptane-2,4,6-trionato)dicopper(II) [Cu2(daa)2], bis(1,5-diphenyl-1,3,5-pentanetrionato)dicopper(II) [Cu2(dba)2], bis(1,5-diphenyl-1,3,5- pentanetrionato)dicobalt(II) [Co2(dba)2], and [6,11-dimethyl-7,10-diazahexadeca-5,11- diene-2,4,13,15-tetranato(4-)-N7N10O4O13;O2O4O13O15] copper(II)cobalt(II) [(CuCo(daaen)] were supported on Cab-O-Sil by the batch impregnation technique. The upported samples were characterized by UV-Vis, elemental analysis, X-ray powder diffraction (XRD), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), and thermal gravimetric analysis (TGA). Elemental analysis and TGA data confirm that the Cu2(daa)2 complex loses one of its coordinated ligands upon adsorption onto silica in THF at greater than 4.43 wt% Cu loading. By contrast, at all Cu loadings the Cu2(dba)2 complex was adsorbed on the silica surface in CH2Cl2 without loss of ligand. XRD and DRIFTS results confirmed the formation of Cu2(dba)2 multilayer films on the Cab-O-Sil surface for samples containing greater than 2.64 wt% copper. The dinuclear cobalt complex and copper-cobalt complex also do not lose their coordination ligands upon adsorption on the surface. These two metal complexes are amorphous and did not produce XRD patterns. However, DRIFTS results confirm that the binuclear cobalt complex and the copper-cobalt complex begin forming multilayer films between 1.21and 2.53 wt% Cu. The Cu2(dba)2/silica precatalysts were subsequently converted to the catalysts by decomposing the organic ligands at 450 degrees Celsius followed by activation with 2% H2 at 250 degrees Celsius and were evaluated for methanol synthesis and methanol decomposition reactions. Kinetic studies demonstrated that the 3.70% Cu/silica[Cu2(dba)2] catalyst is more active for methanol decomposition than it is for methanol synthesis. The supported dinuclear cobalt and copper-cobalt precatalysts were converted to the catalyst by heating at 450 degrees Celsius followed by activation of the catalysts with 50% H2. Four different catalysts, 3.5% Co/silica[Co2(dba)2], 6.7% Co/silica[Co2(dba)2], 2.3% Co/silica[CuCo(daaen)], and 5.5% Co/silica[Co2(daa)2] were evaluated for the Fischer-Tropsch reaction at 350 degrees Celsius in a batch reactor. The supported binuclear cobalt catalyst produced C1−C7 alkanes and a significant amount of CO2. By contrast, the catalyst formed from heterobinuclear CuCo(daaen) showed the ability to convert syngas to aromatics with a narrow product distribution. In addition, the 6.7% Co/silica[Co2(dba)2] multilayer catalysts have above 98% conversion rates and 60% liquid hydrocarbon selectivity in a flow reactor.
Author: Abderrazzak Douhal
Publisher: Elsevier
ISBN: 0128178140
Category : Science
Languages : en
Pages : 464
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Book Description
Chemistry of Silica and Zeolite-Based Materials covers a wide range of topics related to silica-based materials from design and synthesis to applications in different fields of science and technology. Since silica is transparent and inert to the light, it is a very attractive host material for constructing artificial photosynthesis systems. As an earth-abundant oxide, silica is an ideal and basic material for application of various oxides, and the science and technology of silica-based materials are fundamentally important for understanding other oxide-based materials. The book examines nanosolvation and confined molecules in silica hosts, catalysis and photocatalysis, photonics, photosensors, photovoltaics, energy, environmental sciences, drug delivery, and health. Written by a highly experienced and internationally renowned team from around the world, Chemistry of Silica and Zeolite-Based Materials is ideal for chemists, materials scientists, chemical engineers, physicists, biologists, biomedical sciences, environmental scientists, toxicologists, and pharma scientists. --- "The enormous versatility of silica for building a large variety of materials with unique properties has been very well illustrated in this book.... The reader will be exposed to numerous potential applications of these materials – from photocatalytic, optical and electronic applications, to chemical reactivity in confined spaces and biological applications. This book is of clear interest not only to PhD students and postdocs, but also to researchers in this field seeking an understanding of the possible applications of meso and microporous silica-derived materials." - Professor Avelino Corma, Institute of Chemical Technology (ITQ-CSIC) and Polytechnical University of Valencia, Spain Discusses the most important advances in various fields using silica materials, including nanosolvation and confined molecules in silica hosts, catalysis and photocatalysis, and other topics Written by a global team of experts from a variety of science and technology disciplines Ideal resource for chemists, materials scientists, and chemical engineers working with oxide-based materials
Author: Sachin Namdeo Kothawade
Publisher:
ISBN: 9783111338446
Category : Medical
Languages : en
Pages : 0
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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: Can Li
Publisher: John Wiley & Sons
ISBN: 3527675922
Category : Technology & Engineering
Languages : en
Pages : 860
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Book Description
There are two main disciplines in catalysis research -- homogeneous and heterogeneous catalysis. This is due to the fact that the catalyst is either in the same phase (homogeneous catalysis) as the reaction being catalyzed or in a different phase (heterogeneous catalysis). Over the past decade, various approaches have been implemented to combine the advantages of homogeneous catalysis (efficiency, selectivity) with those of heterogeneous catalysis (stability, recovery) by the heterogenization of homogeneous catalysts or by carrying out homogeneous reactions under heterogeneous conditions. This unique handbook fills the gap in the market for an up-to-date work that links both homogeneous catalysis applied to organic reactions and catalytic reactions on surfaces of heterogeneous catalysts. As such, it highlights structural analogies and shows mechanistic parallels between the two, while additionally presenting kinetic analysis methods and models that either work for both homogeneous and heterogeneous catalysis. Chapters cover asymmetric, emulsion, phase-transfer, supported homogeneous, and organocatalysis, as well as in nanoreactors and for specific applications, catalytic reactions in ionic liquids, fluorous and supercritical solvents and in water. Finally, the text includes computational methods for investigating structure-reactivity relations. With its wealth of information, this invaluable reference provides academic and industrial chemists with novel concepts for innovative catalysis research.
Author: Mihai Polverejan
Publisher:
ISBN:
Category : Aluminum silicates
Languages : en
Pages : 364
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Book Description
Author: Michael L. Prunier
Publisher: CRC Press
ISBN: 1439857709
Category : Science
Languages : en
Pages : 679
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Book Description
Apply an Omnibus of Knowledge from Leaders in the Field The unexpected diversity of topics presented at previous gatherings forced organizers of 2008’s 22nd Conference on Catalysis of Organic Reactions to expand its format to reflect the remarkable current degree of specialization in the field. Catalysis of Organic Reactions contains a compilation of papers presented at the event, and subsequently, few books will be able to match the breadth and depth of its content. Featuring papers by respected scientists from academia, industry, and the governmental research-and-development sector, it covers various aspects of the production, sale, and use of catalysts for practical purposes. Articles concentrate on the general area of catalyzed synthesis, emphasizing the production of organic chemicals. With a focus on application rather than theory, the dominant theme is the traditionally practiced area of heterogeneous catalysis. Topics include: Hydrogenation and hydrogenolysis C-C coupling Amination and oxidation (including the precious metal, supported base metal, and sponge metal, Raney process, and homogeneous catalyst types) End uses of products, including industrial petrochemicals, fine chemicals, and pharma intermediates Those working with applied catalysis will benefit greatly from this consolidation of insights and reviews of the latest developments in the field. Each of the papers presented were edited by ORCS members, drawn from both academia and industry, and peer-reviewed by experts in related fields of study.
Author: Abhijeet Jayant Karkamkar
Publisher:
ISBN:
Category : Molecular sieves
Languages : en
Pages : 422
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Book Description
