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Öğe Metal Organic Frameworks Based Materials for Renewable Energy Applications(Materials Research Forum Llc, 2019) Göksu, Haydar; Zengin, Nursefa; Şen, FatihCrystalline metal-organic frames (MOFs) fall into the category of high potential porous materials that can be used in gas storage, adsorption / separation, adsorption as adsorbent, catalysis, magnetism, sensor design and drug delivery. MOFs are typically formed by self-assembly, where secondary building units (SBUs) are connected with organic ligands to form complex networks. Organic ligands or metallic SBUs may be modified to be critical for their functionality and utility for specific applications in order to control the porosity of MOFs. MOFs are used in renewable energy and environmental applications, application of hydrogen energy, hydrogen storage, storage and conversion of CO2, biogas production, thermal energy storage, rechargeable batteries and supercapacitors and in dye sensitized solar cells.Öğe Application of polymer composites and nanocomposites as corrosion inhibitors(Nova Science Publishers, Inc., 2016) Umoren, Saviour A.; Solomon, Moses M.Corrosion commonly defined as the deterioration of a material (usually a metal) or its properties because of a reaction with its environment is a global problem. NACE International, The Corrosion Society, estimates that global corrosion costs can be about 3-5% of GDP or GNP. Methods commonly adopted to combat corrosion include coatings and linings, cathodic protection, materials selection and corrosion inhibitors. Corrosion inhibitors are chemicals that, when present in very low concentrations, retard corrosion. Corrosion inhibitors form a layer over the metallic substrate and protect the metal from corrosion, thereby enhancing the life of the metal. Polymers, both naturally occurring and synthetic have been tested for metal corrosion inhibitors as replacement for the toxic inorganic and organic corrosion inhibitors. Interest in polymers stems from their availability, cost effectiveness, and eco-friendliness in addition to the inherent stability and multiple adsorption centers. However, it is found that most polymer materials studied are moderate corrosion inhibitors. Several attempts such as copolymerizing, addition of substances that exert synergistic effect, cross linking, blending, and most recently incorporation of inorganic substances in nano size into the polymer matrix have been made to improve the inhibition ability of polymers. Composites are materials consisting of two or more chemically distinct constituents on a minutescale, having a distinct interface separating them, and with properties which cannot be obtained by any constituent working individually. The production of composite materials is either by ex-situ or in-situ formation through chemical synthesis although electrochemical method had been used recently. The application of polymer composites and nanocomposites as anticorrosion materials have shown promising results and are believed to form metal chelate which could barricade metal surfaces from corrosive agents. In this chapter, the application of polymer composites and nanocomposites as corrosion inhibitors for different metal substrates in different corrosive media is explored. © 2017 Nova Science Publishers, Inc.
