Metal Containing Mesoporous Silica Materials PDF Download

Author: Sinue Gomez
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

View

Book Description

Author: Xining Chen
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659609220
Category :
Languages : en
Pages : 224

View

Book Description
Mesoporous materials with well-defined pore size and structure have applications in a wide range of topics from catalysis, environment and medicine to electronics. This work presents the methods and procedures for preparing functional mesoporous materials for applications in the environment from removal of toxic metals to clean synthesis of fine chemicals. Magnetic mesoporous silica (magMCM-41) of large surface area (800 m2 g-1) and high magnetization (8.30 emu g-1) was prepared by grafting 10 nm magnetic iron oxide nanoparticles in the silica matrix, and this highly dispersible material can be easily separated from aqueous solution by a magnetic field. Functionalization of the surface with selected ligands and metal complexes creates powerful capabilities for chemical separation and catalysis. Fe3+-magMCM-41 prepared by grafting aminopropyls and then adsorbing Fe3+ was found to be a highly selective adsorbent which adsorbed only As(V) and Cr(VI) oxyanions (70 and 100 mg g-1, respectively) without any Cu(II). A series of salt-tolerant sorbents with designed functionalized groups were capable of removing 97 99% toxic heavy metals with a high Kd (distribution coefficient) value.

Author: Malcolm Davidson
Publisher:
ISBN:
Category : Catalysis
Languages : en
Pages : 110

View

Book Description

Author: Peng Wu
Publisher: John Wiley & Sons
ISBN: 3527839372
Category : Technology & Engineering
Languages : en
Pages : 501

View

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: Rafael Huirache Acuña
Publisher: BoD – Books on Demand
ISBN: 1838807551
Category : Technology & Engineering
Languages : en
Pages : 126

View

Book Description
Nowadays, microporous and mesoporous materials are versatile solids of great interest due to their structures and pore sizes, which allow their application in many areas. Accordingly, with IUPAC, materials with pore sizes smaller than 2 nm are called microporous and with pore sizes between 2 and 50 nm are called mesoporous. The pore size has an important impact on the material properties and affects their applications. In addition, high surface area, and their ability to incorporate functional groups on the framework are of great relevance for commercial and science applications. This book intends to provide readers with a comprehensive overview of recent improvements in the microporous and mesoporous materials field.

Author: Viorica Parvulescu
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 0

View

Book Description
The ordered mesoporous silicas containing transition metals are versatile catalytic materials for oxidation of a wide range of organic compounds. In order to obtain active catalysts, different active redox metal sites have been introduced into specific locations (mesoporous channels and framework) of ordered mesoporous silicas (OMSs). All the reported results evidenced that localization of metal ions, their interaction with another metal (bimetallic catalysts) and the support, with typical properties of the ordered mesoporous silica, influenced the oxidation state, respectively their redox properties. To support this, the results regarding the specific properties of transitional metals in the ordered structure of silica, obtained using various characterization methods, were presented. The activity of metal sites in the oxidation reactions was evidenced in various applications carried out in the liquid or gaseous phase. The oxidation of various organic compounds in liquid phase with H2O2 (especially aromatic compounds and of alcohols) and in gas phase with oxygen from air was presented for a variety of metal-modified OMSs. The active sites and possible reaction mechanisms were presented for some catalytic systems. The immobilization of multiple metal active species on new ordered porous frameworks and their synergistic interactions remain topics of interest in the future.

Author: An-Hui Lu
Publisher: Royal Society of Chemistry
ISBN: 0854041885
Category : Science
Languages : en
Pages : 279

View

Book Description
Nanostructured materials with tailored properties are regarded as a fundamental element in the development of future science and technology. Research is still ongoing into the nanosized construction elements required to create functional solids. The recently developed technique, nanocasting, has great advantage over others in terms of the synthesis of special nanostructured materials by the careful choice of suitable elements and nanoengineering steps. This new book summarizes the recent developments in nanocasting, including the principles of nanocasting, syntheses of novel nanostructured materials, characterization methods, detailed synthetic recipes and further possible development in this area. The book focuses on the synthesis of porous solids from the viewpoint of methodology and introduces the science of nanocasting from fundamental principles to their use in synthesis of various materials. It starts by outlining the principles of nanocasting, requirements to the templates and precursors and the tools needed to probe matter at the nanoscale level. It describes how to synthesize nano structured porous solids with defined characteristics and finally discusses the functionalization and application of porous solids. Special attention is given to new developments in this field and future perspectives. A useful appendix covering the detailed synthetic recipes of various templates including porous silica, porous carbon and colloidal spheres is included which will be invaluable to researchers wanting to follow and reproduce nanocast materials. Topics covered in the book include: * inorganic chemistry * organic chemistry * solution chemistry * sol-gel and interface science * acid-base equilibria * electrochemistry * biochemistry * confined synthesis The book gives readers not only an overview of nanocasting technology, but also sufficient information and knowledge for those wanting to prepare various nanostructured materials without needing to search the available literature.

Author: Xinqing Chen
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659677304
Category :
Languages : en
Pages : 224

View

Book Description
Mesoporous materials with well-defined pore size and structure have applications in a wide range of topics from catalysis, environment and medicine to electronics. This work presents the methods and procedures for preparing functional mesoporous materials for applications in the environment from removal of toxic metals to clean synthesis of fine chemicals.Magnetic mesoporous silica (magMCM-41) of large surface area (800 m2 g-1) and high magnetization (8.30 emu g-1) was prepared by grafting 10 nm magnetic iron oxide nanoparticles in the silica matrix, and this highly dispersible material can be easily separated from aqueous solution by a magnetic field.Functionalization of the surface with selected ligands and metal complexes creates powerful capabilities for chemical separation and catalysis. Fe3+-magMCM-41 prepared by grafting aminopropyls and then adsorbing Fe3+ was found to be a highly selective adsorbent which adsorbed only As(V) and Cr(VI) oxyanions (i.e. 70 and 100 mg g-1, respectively) without any Cu(II). Meanwhile, the catalytic performances of modified materials were tested for Knoevenagel condensation reactions. The result showed the conversion excessed 97%.

Author: Dongyuan Zhao
Publisher: John Wiley & Sons
ISBN: 3527647880
Category : Science
Languages : en
Pages : 480

View

Book Description
Mesoporous materials are a class of molecules with a large and uniform pore size, highly regular nanopores, and a large surface area. This book is devoted to all aspects and types of these materials and describes, in an in-depth and systematic manner, the step-by-step synthesis and its mechanism, as well as the characterization, morphology control, hybridization, and applications, of mesoporous molecular sieves. In so doing, it covers silicates, metal-doped silicates, nonsilicates, and organic-inorganic hybrids. Although the emphasis is on synthesis, the expert authors also discuss characterization and applications, ranging from catalysis and biochemistry to optics and the use of these materials as templates for nanomaterial synthesis. Both the fundamentals and the latest research results are covered, ensuring that this monograph serves as a reference for researchers in and newcomers to the field.

Author: Abderrazzak Douhal
Publisher: Elsevier
ISBN: 0128178140
Category : Science
Languages : en
Pages : 464

View

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