Synthesis And Assembly Of Porous Silica Nanostructures For X Ray Catalyzed Reactions
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Synthesis And Assembly Of Porous Silica Nanostructures For X Ray Catalyzed Reactions
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Author : Laura Y. Chong
language : en
Publisher:
Release Date : 2019
Synthesis And Assembly Of Porous Silica Nanostructures For X Ray Catalyzed Reactions written by Laura Y. Chong and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
The syntheses of silica materials provide many experimental methods that introduce different assemblies of nanoporous silica structures. Silica nanoparticles, hollow silica shells, core/shell structures and porous silica materials are examples of structures that have been synthesized in research works. A standard procedure for producing silica nanomaterials uses the established sol-gel Stöber process. Other developed methods also include solvothermal and hydrothermal techniques to prepare amorphous and crystalline silica materials. A review of the different approaches such as self-template, hard template, and soft template are described to present particular strategies that have been adapted to fabricate silica nanomaterials. The composition of silica scaffolds can include organic and inorganic states of matter. These adaptations can be utilized to achieve certain configurations during post synthetic treatments such as calcination and etching. The morphology of cubic and spherical silica particles are also studied to analyze the synthetic factors regarding the formation of shapes. Here, silica microcubes are produced after secondary precipitation of silica onto silica nanospheres. Hollow silica microcubes with different shell thicknesses are fabricated from the mSiO2@mSiO2 cubic particles through including additional silicate precursors during synthesizing the external layer followed by etching in warm water. Porous silica structures are recognized categories of materials that are applied for nanoscale storage and transport purposes. In this study, hollow silica microcubes are applied in the X-ray catalyzed hydroxylation of coumarin-3-carboxylic acid. X-ray induced enhancement occurs at the Type 1 and Type 2 proximities. Type 1 is described to be at least 100 nm away from the nanoparticle interface while Type 2 is within 100 nm from the nanoparticle interface. This review investigates current and viable methods to synthesize and apply porous silica nano-/micro-structures for research analyses.
Synthesis Of Au Loaded Mesoporous Silica Nanoparticles For Catalytic Applications
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Author : 林憶慈
language : en
Publisher:
Release Date : 2018
Synthesis Of Au Loaded Mesoporous Silica Nanoparticles For Catalytic Applications written by 林憶慈 and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Nanostructures And Nanomaterials
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Author : Guozhong Cao
language : en
Publisher: World Scientific
Release Date : 2011
Nanostructures And Nanomaterials written by Guozhong Cao and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Science categories.
This text focuses on the synthesis, properties and applications of nanostructures and nanomaterials, particularly inorganic nanomaterials. It provides coverage of the fundamentals and processing techniques with regard to synthesis, properties, characterization and applications of nanostructures and nanomaterials.
Gas Phase Synthesis Of Silica Nanoparticles Reaction Kinetics Synthesis And Characterization
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Author : Ali Abdali
language : en
Publisher:
Release Date : 2014-04-25
Gas Phase Synthesis Of Silica Nanoparticles Reaction Kinetics Synthesis And Characterization written by Ali Abdali and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-04-25 with categories.
Design Of Heterogeneous Catalysts
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Author : Umit S. Ozkan
language : en
Publisher: John Wiley & Sons
Release Date : 2009-02-11
Design Of Heterogeneous Catalysts written by Umit S. Ozkan and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-02-11 with Science categories.
This long-awaited reference source is the first book to focus on this important and hot topic. As such, it provides examples from a wide array of fields where catalyst design has been based on new insights and understanding, presenting such modern and important topics as self-assembly, nature-inspired catalysis, nano-scale architecture of surfaces and theoretical methods. With its inclusion of all the useful and powerful tools for the rational design of catalysts, this is a true "must have" book for every researcher in the field.
Synthesis Of Silica Based Porous Nanomaterials
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Author : Paul S. Mueller
language : en
Publisher:
Release Date : 2014
Synthesis Of Silica Based Porous Nanomaterials written by Paul S. Mueller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Mesoporous materials categories.
Silica is one of the most abundant elements on the planet, has flexible bonding properties and generally excellent stability. Because of these properties, silica has been a vital component in technologies ranging from ancient glassware to modern supercomputers. Silica is able to form a wide range of materials both alone and as a component of larger material frameworks. Porous silica based nanomaterials are rapidly growing in importance because of their many applications in a wide variety of fields. This thesis focuses on the synthesis of silica based porous nanomaterials: nanocrystalline zeolites, mesoporous silica nanoparticles, and iron oxide core/shell nanocomposites. The synthetic conditions of these materials were varied in order to maximize efficiency, minimize environmental impact, and produce high quality material with far reaching potential applications. The materials were characterized by physicochemical techniques including Transmission Electron Microscopy, Dynamic Light Scattering, Powder X-Ray Diffraction, Solid State NMR, and Nitrogen Adsorption Isotherms. The materials were evaluated and conditions were controlled to produce high yields of quality nanomaterials and hypothesize methods for further synthetic control. The products will be used in studies involving nanoparticle toxicity, environmental remediation, and drug delivery.
Synthesis And Characterization Of Zirconia Coated Silica Nanoparticles For Catalytic Reactions
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Author :
language : en
Publisher:
Release Date :
Synthesis And Characterization Of Zirconia Coated Silica Nanoparticles For Catalytic Reactions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Silica nanoparticles and zirconia coated silica nanoparticles were prepared by Stober method.and various subsequent methods. The nanoparticles obtained were characterized by XRD, SEM, EDAX and IR analytical techniques. The XRD study of pure ZrO2 shows well crystalline characteristics with the presence of 100% monoclinic phase. The coated nanoparticles are found to be amorphous in nature. SEM study indicate the particles to possess disorder morphology with the particle are attached to each other through grain boundary to form agglomerated structure. The zirconia coated silica nanoparticles were used as a efficient catalyst for the synthesis of Bis(indolyl) methane under solvent free condition. The Bis(indolyl) methane were obtained with high yield and purity.
Nanostructures Nanomaterials
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Author : Guozhong Cao
language : en
Publisher: Imperial College Press
Release Date : 2004
Nanostructures Nanomaterials written by Guozhong Cao and has been published by Imperial College Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Science categories.
This important book focuses on the synthesis and fabrication of nanostructures and nanomaterials, but also includes properties and applications of nanostructures and nanomaterials, particularly inorganic nanomaterials. It provides balanced and comprehensive coverage of the fundamentals and processing techniques with regard to synthesis, characterization, properties, and applications of nanostructures and nanomaterials. Both chemical processing and lithographic techniques are presented in a systematic and coherent manner for the synthesis and fabrication of 0-D, 1-D, and 2-D nanostructures, as well as special nanomaterials such as carbon nanotubes and ordered mesoporous oxides. The book will serve as a general introduction to nanomaterials and nanotechnology for teaching and self-study purposes.
Synthesis Characterization And Catalytic Activity Of Chiral Mesoporous Silica For Asymmetric Reaction
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Author : Syaidatul Shafiqah Yusrirohani
language : en
Publisher:
Release Date : 2013
Synthesis Characterization And Catalytic Activity Of Chiral Mesoporous Silica For Asymmetric Reaction written by Syaidatul Shafiqah Yusrirohani and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Silica categories.
Growth Of Silica Based Nanoparticles
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Author : Teresa Yi Kao
language : en
Publisher:
Release Date : 2017
Growth Of Silica Based Nanoparticles written by Teresa Yi Kao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
Silica chemistry provides a uniquely tunable platform for nanoparticle synthesis, where particle size, nanoscale morphology, and surface properties can be precisely controlled. Recent advances demonstrate that conveniently accessible parameters, including silica precursor chemistry, solvent, and reaction pH, can be used to tune particle size down to below 10 nm. By cooperative assembly of inorganic silica species and organic molecular structure directing agents, a diverse range of mesoporous silica nanoparticles with hexagonal, cubic, and multicompartment structures can be produced. This versatile chemistry provides pathways for answering fundamental questions about structure formation and developing novel functional nanomaterials for applications including separation, catalysis, and drug delivery. In this dissertation, two examples of such silica nanoparticle systems are discussed. As a first example, the development of an intensity-based fluorescent silica nanoparticle barcode is discussed. This work is motivated by a need for fluorescent tags that increase the number of molecular species that can be simultaneously labeled and reliably distinguished using commercially available fluorescence microscopes. In this study, the synthetic parameters that govern the incorporation of precisely controlled numbers of fluorescent dyes into silica nanoparticles in batch reactions are identified. Heterogeneities within particle batches are mapped using single particle fluorescence microscopy. Proof-of-concept experiments demonstrate that fluorescent silica nanoparticles with well-separated high and low fluorescence intensity distribution levels can be synthesized in batch reactions and used as an intensity barcode in fluorescence microscopy. In the second example, a mesoporous silica nanoparticle system, structure directed by surfactant-micelle self-assembly, is investigated. As a function of an added pore expander molecule or reaction stirring rate, a series of four distinct mesoporous silica nanoparticle structures is observed: hexagonal, cubic/hexagonal multicompartment, cubic, and dodecagonal quasicrystalline. The mechanism driving the structural transition between cubic crystalline and dodecagonal quasicrystalline mesoporous silica nanoparticles is investigated. Control of nanoparticle size down to a single tiling unit (