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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 55 for “"hydrothermal synthesis"”.
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Hydrothermal synthesis of zinc oxide nanowire arrays for photovoltaic applications
… grown vertically aligned from a substrate using hydrothermal synthesis, a low-cost, scalable process that is compatible with many semiconductor processing techniques. However, precise control over nanowire array dimensions such as nanowire spacing, diameter, length, and alignment, which is …
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Hydrothermal synthesis of Al-doped ZnO nanowires and their application for photovoltaic devices
… properties of ZnO nanowires, Al doping of hydrothermally synthesized ZnO nanowires is studied along with the optimization of doping concentration. The morphology of ZnO nanowire arrays is also studied as a function of the doping concentration in the growth solution. Finally, photovoltaic …
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Hydrothermal synthesis and optimisation of zeolite Na-P1 from South African coal fly ash
… use of different sources of fly ash for zeolite synthesis.However, most of the studies have concentrated on class C fly ash and very few have reported the use of South African class F fly ash as feedstock for zeolite synthesis.Class F fly ash from South Africa has been confirmed to be a good …
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Hydrothermal synthesis and characterization of zeolite from Malaysia’s natural kaolin for adsorption of sodium ion (NA+) from seawater
… and transform into the Zeolite�A. The proposed synthesis of zeolite-A from kaolin has been reduced the cost of using synthetic reagent and high energy utilization. The various operating parameters to synthesis zeolite-A from both low-grade kaolin (Perak and Johor) were investigated to produce …
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Hydrothermal synthesis and characterization of carbon dots for enhanced biosensing: A focus on optical properties and DNA interactions
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-12-01
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Characterization of nanostructures ZnO synthesized through hydrothermal method
… be derived using a variety of techniques. Using hydrothermal synthesis, ZnO nanostructures can be produced easily on a large scale due to the low temperature involved. Among the factors that influence the crystallinity of ZnO nanostructures are types of alkaline solution, the alkaline pH value …
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Nanostructured Cerium Oxide-based Catalysts for the Chemical Conversion of CO2 to Dimethyl Carbonate and Methane.
… to improve the efficiency of the direct synthesis of DMC from CO2 and methanol. Additionally, ceria-based materials were employed as supports for nickel-based catalysts in the methanation reaction. Various synthetic strategies were developed (hydrothermal synthesis, solution combustion, …
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Formation, modification and new applications of orderly structured titanium oxide nanostructures /
… dissertation, it was first time determined that hydrothermal synthesis and subsequent calcination under oxygen-free atmosphere allow the formation of high surface area titanium suboxide nanostructures with controllable surface morphology, phase composition and bandwidth. For the first time, thin …
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Synthesis, characterization and catalytic testing of metal tungstates as catalysts for activation of lower alkanes
… to vanadium oxide. The deliberate use of hydrothermal techniques can turn the typical combustion catalyst manganese oxide into a selective catalyst for oxidative dehydrogenation of propane (ODP). Nanostructured, crystalline MnWO4 serves as the support that stabilizes a defect-rich MnOx …
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Iron Oxide Nanoparticle Surface Modification: Synthesis and Characterization
… magnetite (iron oxide) nanoparticles through hydrothermal synthesis and modifying their surfaces with organic functional groups in order to both modulate surface chemistry and facilitate the attachment of molecules such as peptides via covalent bond formations. Modifying their surfaces with …
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Mechanical and Electrical Characterization of Carbon Fiber/Bucky Paper/Zinc Oxide Hybrid Composites
… In this study, a low temperature ( 90_C) hydrothermal synthesis method was utilized to grow ZnO nanorods on the surface of carbon fiber fabrics. Different configurations of hybrid composites based on carbon fibers, in combination with ZnO nanorods and Bucky paper were fabricated. The …
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The purification of industrial wastewater to remove heavy metals and investigation into the use of zeolite as a remediation tool
… was carried out in two ways: first, conventional hydrothermal synthesis and second, alkaline fusion prior to hydrothermal synthesis. The results from both routes show that zeolite A was synthesised successfully. Finally, the experiments show that both natural and synthetic zeolites can be …
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Data Driven Synthesis Planning Applied to Zeolite Materials
… the bottleneck in materials design to the synthesis and processing of materials, posing the question "How" to make a specified material. Zeolites are microporous, crystalline aluminosilicates described by this paradigm. Their relevance for chemical and "green" applications has led to …
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Catalytic properties, densification and mechanical properties of nanocrystalline yttria-zirconia-based materials
… nanocrystalline particles obtained via hydrothermal synthesis, and the effective elimination of secondary porosity through the dry compact processing. Submicron-sized 3 mol% Y203-ZrO2 ceramics with a grain size of - 150 nm was also obtained with commercial TOSOHC powders. Grain growth …
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Synthesis and characterisation of new framework materials
… such as hafnium, niobium<br/>and iron, have been synthesised and fully characterised. These materials have been<br/>synthesised by solvothermal techniques and the principal analytical technique to<br/>characterise the resulting single crystals has been Single Crystal X-ray …
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Design and characterization of zeolite membranes for fluid separation
… of silicalite-1 and Na-LTA zeolites have been synthesised onto carbon-graphite supports using a hydrothermal synthesis procedure. The separation behaviour of the composite membranes was characterized by gas permeation studies of pure, binary and ternary mixtures of methane, ethane and propane. …
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Development and optimization of zeolite synthesis route from natural koalin for adsorption of dyes
Synthesis of zeolite using kaolin as the main source of alumina and silica has been identified as a novel zeolite production process, which could reduce the cost of using the synthetic reagents and the high energy consumption. A low grade kaolin was used for studying the most suitable synthesis …
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Investigation of layered calcium phosphates and related materials for Biomaterial applications
… including ceramic methods, acid flux and hydrothermal synthesis. Some of the layered phases prepared were then modified using intercalation and exfoliation. Characterisation was performed mainly using powder X ray diffraction with thermogravimetric and fourier transform infrared providing …
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A study on wettability properties of rutile-phase TiO2 nanostructure film
… application. TiO2 is fabricated using the hydrothermal synthesis method at 150°C. The fluorine-doped tin oxide (FTO) is used as a substrate to grow the TiO2 nanostructure by mixing hydrochloric acid (HCl), deionised water (DI) and titanium (IV) butoxide (TBOT). The effects of the duration …
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Feasibility of waste-derived hydroxyapatite mixed with ultra high molecular weight polyethylene composites for fused deposition modeling process
… has been used to synthesize HAp by using hydrothermal synthesis. The Ca/P ratio was investigated by using SEM/EDS and XRD test. By using these test, it revealed Ca/P ratio of waste-derived HAp has shown 1.69 approximately with the standard Ca/P ratio (1.67). HAp/UHMWPE composites …
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