Download or read book Design Synthesis and Characterization of Transition Metal Oxide Based Functional Materials for Multi phase Catalytic Applications written by Chung-Hao Kuo and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design Synthesis and Characterization of Transition Metal Oxide Nanomaterials as Efficient Sorbents and Multifunctional Catalysts for Oxidation Dehydrogenative Coupling and Desulfurization Reactions written by Chandima Weerakkody and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The research work presented here is focused on nanotechnological synthetic approaches for transition metal oxide nanomaterials and their applications in heterogeneous catalysis and adsorptive desulfurization reactions. Here, we discuss the controllable synthesis of functional nanomaterials and investigation of their structure-activity relationship in multiphase catalytic and sorption reactions. Among transition metal oxides, Co3O4 is well known for the presence of mobile oxygen, and thus is more reactive towards oxidation reactions. Aerobic oxidation under additive free conditions is highly desirable in organic synthesis reactions, from the viewpoint of green and sustainable chemistry. We demonstrate the activity enhancement of mesoporous cobalt oxide materials by substitutional doping of molybdenum ions. We discuss the surface chemistry in the production of active metal oxide nanoparticles and effect of lattice deformation on creating surface defects. High conversion and selectivity was achieved by controlling the surface area, Lewis acidity, and oxygen vacancy density of the solid catalyst in the liquid phase dehydrogenative coupling reactions. Synthesis of high surface area mesoporous cobalt molybdenum mixed metal oxide materials was accomplished using surfactant assisted inverse micelle method. The cobalt molybdenum oxide materials were investigated as a efficient desulfurization sorbent in a fixed bed reactor at low temperatures ( C).

Download or read book Tailored Functional Oxide Nanomaterials written by Chiara Maccato and published by John Wiley & Sons. This book was released on 2022-03-02 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tailored Functional Oxide Nanomaterials A comprehensive exploration of the preparation and application of metal oxide nanomaterials Tailored Functional Oxide Nanomaterials: From Design to Multi-Purpose Applications delivers a one-of-a-kind discussion of the fundamentals and key applications of metal oxide nanomaterials. The book explores everything from their preparation to the mastering of their characteristics in an interdisciplinary view. The distinguished authors address theoretical research and advanced technological utilizations, illustrating key issues for the understanding and real-world end-uses of the most important class of inorganic materials. The interplay between the design, preparation, chemico-physical characterization, and functional behaviors of metal oxide nanomaterials in a variety of fields is presented. Up-to-date work and knowledge on these materials is also described, with fulsome summaries of important applications that are relevant to researchers pursuing safety, sustainability, and energy end-uses. Readers will also find: A thorough introduction to vapor phase growth of metal oxide thin films and nanostructures Comprehensive explorations of addressing complex transition metal oxides at the nanoscale, including bottom-up syntheses of nano-objects and properties Practical discussions of nanosized oxides supported on mats of carbon nanotubes, including synthesis strategies and performances of Ti/CNT systems In-depth examinations of computational approaches to the study of oxide nanomaterials and nanoporous oxides Perfect for materials scientists, inorganic chemists, physicists, catalytic chemists, and chemical engineers, Tailored Functional Oxide Nanomaterials will also earn a place in the libraries of solid-state chemists.

Download or read book Design Synthesis and Characterization of Transition Metal Oxide Nanomaterials for Emerging Catalytic Applications written by Dharmarathna Arachchige Saminda Dharmarathna and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Transition Metal Oxide Hydroxide Based Functional Materials for Environmental and Energy Applications written by Junkai He and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, transition metal oxide/hydroxide-based functional nanomaterials with specific structures and properties are developed and characterized for targeting applications in environmental pollution abatement and energy conversion and storage. In the first part, graphene supported Co3O4 composite is synthesized in one-step using a facile microwave-assisted method. Graphene serves as the substrate, providing high surface area, good conductivity, and good mechanical and chemical durability. The wide pore size distribution, synergistic effect, and high surface area of the composite are found to contribute to the high performance of lithium-ion batteries. In the second part, we focused on the synthesis of a series of heterogeneous electrocatalysts based on graphene coupled mixed-metal (oxy)hydroxides containing specific concentrations of nickel, cobalt, and iron to investigate the influence of metal composition on the structure, properties, and activities for the oxygen evolution reaction (OER). Characterization results indicate iron incorporation induced structural disorder, ultra-small nanosheets, and high surface area of metal (oxy)hydroxides. In addition, the trend in Tafel slopes is related to the abundance of surface adsorbed hydroxyl groups. Density functional theory (DFT) calculations demonstrate electronic structure and free energy change of ternary metal oxyhydroxide enhance the energetics for OER electrocatalysis. The optimized ternary metal oxyhydroxide exhibits superior OER electrocatalytic activity than the state-of-the-art IrO2 catalyst. In the third part, we further developed unique mesoporous NiO/MnO2 in one step using modified UCT (University of Connecticut) methods. Both the OER and the oxygen reduction reaction (ORR) electrocatalytic activities and stabilities in alkaline media are promoted after further coating with polyaniline (PANI). Many factors are found to contribute to the improved catalytic activity, for example, accessible mesoporous structure, high surface area, core-shell structure, and good electrical conductivity. Beside the development of nanomaterials for renewable energy, we also created novel catalysts for environmental pollution abatement. Last but not least, a series of manganese oxide-based core-shell nanoarrays are integrated on the cordierite monolithic substrates. Different manganese-cobalt oxide core-shell nanoarrays are further evaluated due to the high activity for CO oxidation. This fast, cost-effective, and scalable method will provide a new route for synthesizing efficient core-shell nanoarray monolithic catalysts for low temperature catalysis.

Download or read book Design Synthesis and Characterization of Transition Metal Oxide Nanomaterials as Efficient Sorbents and Emerging Catalysts and Investigation of Carbon Structure oxidation Activity Correlations written by and published by . This book was released on 2015 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis Characterization and Applications of Nano functional Transition Metal Oxides Materials and Graphite Anode Modified by Cvd Carbon Coating written by Yunshuang Ding and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This research consists of two major sections. The first section of this research is focused on developing novel synthesis methods, characterization, and catalytic applications of multi-functional transition metal oxides including manganese oxide nano-materials (2x2 tunel structured manganese oxide octahedral molecular sieve), 3D hierarchical nano-architecture -MnO2 and cobalt oxides, and cobalt based materials. Manganese oxide octahedral molecula sieves (OMS) have ID open framework structures with various theoretical nano-scale tunnel size materials have been investigated extensively as low cost and environmentally benign ionic and molecular sieves and efficient redox catalysts. A novel and efficient solvent-free method has been developed to synthesize manganese oxides with 2 x 2 tunnel structures. The properties of the synthesized OMS-2 materilas have been compared with that synthesized by conventional reflux and hydrothermal methods. Epsilon manganese dioxides with controlled novel 3D architectures have been fabricated via a hydrothermal chemical reaction. The effects of reaction time and reaction temperature on the morphology of the final -MnO2 are investigated, and the formation mechanisms of the hierarchical nano-architectures are proposed. The magnetic properties of -MnO2 are also studied. Resides manganese oxides, a microwave-heating reflux route has been used to synthesize 3D flower like cobalt hydrotalcite-like compounds with layered structure and these compounds can be transferred into spinel structure of Co3O 4. Both materials show the electrocatalytic activity and stability for the electrochemical reduction of oxygen. Therefore these materials have the potential to be electrocatyltic catalysts. The second section of the research is to study the microstructure of carbon films coated on the iron and graphite particles by a Chemical Vapor Deposition (CVD) method and the relationship between the microstructure of the carbon coatings and their effects on electrochemical properties.

Download or read book Green Catalytic Applications of Functional Nanomaterials and Design Synthesis and Structure Property Relationships of Sodium Tungsten Bronze Thin Films written by Niluka D Wasalathanthri and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The research presented here is focused on design, synthesis, and characterization of transition metal oxides for catalytic and energy applications. The first part is devoted to discuss catalytic applications of mesoporous manganese oxides and the second part is devoted to discuss novel solvent driven synthesis of sodium tungsten bronze nanomaterials for energy applications. From the standpoint of green chemistry, the investigation of simple, low cost, stable, environmentally friendly, and potentially active materials for complete oxidation reactions at low temperatures is highly desirable. In recent years, green chemical approaches have become an integrated part of daily life and implementation of this modern discipline led to momentous ecological benefits, innovations and a strengthened economy. My research is devoted to investigate potential materials in oxidative catalysts that resonate with the concepts in green chemistry. The first part of this thesis will discuss the importance of catalytic oxidation reactions, synthesis, and characterization of the mesoporous manganese oxide materials and their applications in a series of complete oxidation reactions. The projected decline in fossil fuels and growing global energy consumption demands alternatives for petroleum feedstock and sustainable conversion processes for energy production. Thus, applicability of mesoporous manganese oxides on complete catalytic oxidation of methane has been discussed. Secondly, complete catalytic oxidation of diesel particulate matter (DPM) which is an unsolicited byproduct emitted by diesel exhaust engines is discussed. In the second part of this thesis, design of novel, solvent driven in situ synthesis method of sodium tungsten bronze is discussed. Tungsten bronzes are well defined, unique class of non-stoichiometric compounds with exclusive characteristic properties. They have attracted much attention in the past few decades due to their wide variety of crystal structures and interesting electro-optic, photochromic, and super-conducting properties However, the synthesis of cubic sodium tungsten bronze nanomaterials with high conductivity is not much reported due to the limitations of high temperature synthetic approaches.

Download or read book Design of Transition Metal Oxide and Phosphide Nanomaterials Their Catalytic Activities written by Md Mahbubur Rahman Shakil and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is focused on developing transition metal-based oxide and phosphide nanomaterials for catalytic application in energy conversion and the organic transformation reaction. The research projects presented in this thesis are: (1) the design and synthesis of transition metal doped ZnO catalysts for the oxygen reduction reaction (ORR), (2) the development of mesoporous FeP and CoP materials as hydrogen evolution reaction (HER) catalysts for electrochemical water splitting, and (3) the fabrication of different ZnO morphologies for coumarin synthesis by the Knoevenagel condensation. The first chapter describes the significance and background of the three research projects. We emphasize the current challenges in developing HER and ORR catalysts for water electrolysis and fuel cell application. Additionally, the importance of coumarins and challenges in their synthesis via the Knoevenagel condensation is included in this chapter. The second chapter contains the synthesis and characterization of transition metal (Mn, Fe, Co, and Ni) doped ZnO nanocrystals. The goal of this study is to develop ZnO based low-cost ORR catalysts. Single-doped and multi-doped transition-metal ZnO samples are synthesized to investigate the effects of doping in the ZnO structure and their activities for ORR. The ORR activity of the ZnO samples is governed primarily by the oxygen vacancies created as a result of the incorporation of dopant elements. The third chapter is comprised of developing mesoporous FeP and CoP nanomaterials as an efficient HER catalyst. A noble approach, the inverse micelle sol-gel method, is utilized to synthesize mesoporous FeP, Co-FeP, CoP, Ni-CoP, and Ni-CoP/CNT materials. The mesoporosity and HER activity of the materials are monitored with the dopants and CNT support. The HER activity of the catalysts predominantly alters with the charge-transfer capabilities of the materials. The fourth chapter includes the preparation of different ZnO morphologies as catalysts for coumarin synthesis. The ZnO properties of different morphologies and their catalytic activities for coumarin synthesis by the Knoevenagel condensation reaction are examined. Catalysts synthesized using methanol show the highest activity. The enhanced activity of the ZnO synthesized in methanol is attributed to the combined effects of relatively high surface area, pore volume, and pore sizes of the materials.

Download or read book Synthesis Characterization and Catalytic Applications of Transition Metal Oxide carbonate Nanomaterials written by Lei Jin and published by . This book was released on 2011 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metal Organic Framework Composites written by Anish Khan and published by Materials Research Forum LLC. This book was released on 2019-10-25 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of their nanoporous structures and ultra-high surface areas Metal-Organic Framework Composites (MOFs) are very interesting materials. The book focusses on the following applications: gas capture and storage, especially molecular hydrogen storage; performance enhancement of Li-ion batteries; gas separation, nano-filtration, ionic sieving, water treatment, and catalysis; sustainable renewable energy resources, electrochemical capacitors, including supercapacitors, asymmetric supercapacitors and hybrid supercapacitors; biomedical disciplines including drug delivery, theranostics; biological detection and imaging; nanoparticle photosensitizers for photodynamic therapy (PDT) and photothermal therapy (PTT). Keywords: MOF Materials, Hydrogen Storage, Renewable Energy Applications, Lithium Batteries, MOF-Quantum Dots, Clean Energy, Nanoporous MOFs, Supercapacitors, Therapeutic Applications, Biosensing, Bioimaging, Phototherapy of Cancer, Gas Separation, Nano-filtration, Ionic Sieving, Water Treatment, Drug Delivery, Theranostics; Nanoparticle Photosensitizers, Photodynamic Therapy (PDT), Photothermal Therapy (PTT).

Download or read book Design Synthesis and Characterization of Transition Metal Oxide Nanomaterials as Efficient Sorbents and Emerging Catalysts and Investigation of Carbon Structure oxidation Activity Correlations written by Lakshitha Randimal Pahalagedara and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Transition Metal Oxide Catalysts for Environmental and Energy Storage Applications written by Wenqiao Song and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Nowadays, environmental concerns and the global energy crisis have become two of our greatest challenges. The main purpose of this dissertation research is to design highly active mesoporous materials that can efficiently catalyze environmental and energy related reactions. Surface properties can be easily tuned by thermal treatment and cation doping, resulting in improved catalytic activities. Synthesis and characterization of the materials, catalytic activities for carbon monoxide oxidation, oxygen reduction and oxygen evolution reactions, and mechanistic studies are covered in this thesis. The first part describes the synthesis of mesoporous cobalt oxides through an inverse micelle route for low temperature carbon monoxide oxidation applications. The prepared material showed much better activity and stability compared with commercial cobalt oxide due to its nanoparticle nature and porous structure. The catalytic performance under both dry and moisture rich conditions were tested. Detailed characterization of the materials suggested that high surface areas and the presence of surface oxygen vacancies were critical for enhanced activities. In real systems, structured catalysts such as monolithic substrates coated with a layer of active material are used instead of powder form catalysts. To evaluate the potential of our catalysts to be used in practical catalytic devices, mesoporous metal oxides (MnOx, Co3O4, CeO2) were coated on cordierite substrate by dip coating and in-situ growth and were used as low temperature diesel oxidation catalysts. The resulting materials showed promising catalytic performance. The effect of particle size, loading amount and Cu doping on the catalytic performance are discussed in detail. In the last part, mesoporous cobalt oxides were used as bifunctional catalysts for oxygen reduction and oxygen evolution reactions. If a catalyst can catalyze both reactions, it will have great potential in the application of rechargeable metal air batteries. Ni and Mn doping were introduced into the cobalt oxide material to increase the conductivity and active site population. The Ni incorporated cobalt oxide exhibited the best activity, which can be considered as a potential substituent for precious metal catalysts (Pt, Ir, Ru). Furthermore, the intrinsic structure-property relationships of the materials were established.

Download or read book Multifunctional Oxide Based Materials From Synthesis to Application written by Teofil Jesionowski and published by MDPI. This book was released on 2019-09-03 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book deals with novel aspects and perspectives in metal oxide and hybrid material fabrication. The contributions are mainly focused on the search for a new group of advanced materials with designed physicochemical properties, especially an expanded porous structure and defined surface activity. The proposed technological procedures result in an enhanced activity of the synthesized hybrid materials, which is of great importance when considering their potential fields of application. The use of such materials in different technological disciplines, including aspects associated with environmental protection, allows for the verification of the proposed synthesis method. Thus, it can be stated that those aspects are of interdisciplinary character and may be located at the interface of three scientific disciplines—chemistry, materials science, and engineering—as well as environmental protection. Furthermore, the presented scientific scope is in some way an answer to the continuous demand for such types of materials and opens new perspectives for their practical use

Download or read book Metal Oxides in Heterogeneous Catalysis written by Jacques C. Vedrine and published by Elsevier. This book was released on 2018-01-11 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxides in Heterogeneous Catalysis is an overview of the past, present and future of heterogeneous catalysis using metal oxides catalysts. The book presents the historical, theoretical, and practical aspects of metal oxide-based heterogeneous catalysis. Metal Oxides in Heterogeneous Catalysis deals with fundamental information on heterogeneous catalysis, including reaction mechanisms and kinetics approaches.There is also a focus on the classification of metal oxides used as catalysts, preparation methods and touches on zeolites, mesoporous materials and Metal-organic frameworks (MOFs) in catalysis. It will touch on acid or base-type reactions, selective (partial) and total oxidation reactions, and enzymatic type reactions The book also touches heavily on the biomass applications of metal oxide catalysts and environmentally related/depollution reactions such as COVs elimination, DeNOx, and DeSOx. Finally, the book also deals with future trends and prospects in metal oxide-based heterogeneous catalysis. Presents case studies in each chapter that provide a focus on the industrial applications Includes fundamentals, key theories and practical applications of metal oxide-based heterogeneous catalysis in one comprehensive resource Edited, and contributed, by leading experts who provide perspectives on synthesis, characterization and applications

Download or read book Metal Oxide Nanocomposites written by B. Raneesh and published by John Wiley & Sons. This book was released on 2021-01-08 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide Nanocomposites: Synthesis and Applications summarizes many of the recent research accomplishments in the area of metal oxide-based nanocomposites. This book focussing on the following topics: Nanocomposites preparation and characterization of metal oxide nanocomposites; synthesis of core/shell metal oxide nanocomposites; multilayer thin films; sequential assembly of nanocomposite materials; semiconducting polymer metal oxide nanocomposites; graphene-based metal and metal oxide nanocomposites; carbon nanotube–metal–oxide nanocomposites; silicon mixed oxide nanocomposites; gas semiconducting sensors based on metal oxide nanocomposites; metal9;]organic framework nanocomposite for hydrogen production and nanocomposites application towards photovoltaic and photocatalytic.

Download or read book Transition Metal Compounds written by Sajjad Haider and published by BoD – Books on Demand. This book was released on 2021-06-09 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores synthesis, structural changes, properties, and potential applications of transition metal (TM) compounds. Over three sections, chapters cover such topics as the synthesis of pentoxide vanadium (V2O5), the effect of TM compounds on structural, dielectric properties and high-temperature superconductors, and TM-doped nanocrystals (NCs).