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Showing 1 to 20 of 57 for “"Macroporous"”.
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Electrodeposited macroporous vanadium oxide Li-ion battery materials
… This work reports on the electrodeposition of 3D macroporous vanadium oxide inverse opals and binary inverse opals on transparent conducting oxide substrates and stainless steel and thermally oxidized stainless-steel substrates. The electrodeposition follows a diffusion limited growth mode to form …
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Macroporous metal oxide battery electrode performance analysis and operando spectroscopy
Vast consumption of fossil fuels has catapulted greenhouse gas emissions which have contributed to increasing the global average temperature at a frightening rate. Thankfully, sun, wind and tides have massive potential to provide energy in an environmentally friendly way. However, maintaining these …
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Macroporous Semiconductors Tantalum Oxide, (Oxy)nitride and Nitride for Photocatalytic Hydrogen Evolution
… In this project, three-dimensional ordered macroporous (3DOM) Ta2O5, TaON and Ta3N5 have been prepared and loaded with Pt co-catalyst (0.5 wt% and 3 wt %). Subsequently the photocatalytic activities with respect to hydrogen production using methanol as a sacrificial reagent were measured and …
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Macroporous Semiconductors Tantalum Oxide, (Oxy)nitride and Nitride for Photocatalytic Hydrogen Evolution
… In this project, three-dimensional ordered macroporous (3DOM) Ta2O5, TaON and Ta3N5 have been prepared and loaded with Pt co-catalyst (0.5 wt% and 3 wt %). Subsequently the photocatalytic activities with respect to hydrogen production using methanol as a sacrificial reagent were measured and …
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Optimising Recording & Stimulation Performance of Neuronal Microelectrode Arrays through Macroporous Conducting Polymer Modification
… (CPs). This research aims to investigate a macroporous templated CP based on poly(3,4-ethylenedioxythiophene)/polystyrene sulphonate (PEDOT/PSS) hypothesised to further increase electrochemical surface area of conventional CP coatings. The enlarged electrochemical surface area offered is …
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Ordered macroporous metal oxides and carbonaceous composites for Li-ion and beyond Li-ion batteries
… investigation of three-dimensional ordered macroporous materials, specifically inverse opal materials, for electrochemical energy storage systems, particularly rechargeable batteries. Exploring the potential of composite structures, this research focuses on TiO2/GeO2 nanocomposites and …
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Design of 3D Macroporous Inverse Opal TiO2 Binary and Ternary Composites Sensitized with Gold Nanoparticles and CdS Quantum Dots for Photocatalysis
… the design of a photocatalyst consisting of macroporous inverse opal (<em>io</em>) TiO<sub>2</sub> embedded with gold nanoparticles (AuNPs) and cadmium sulfide quantum dots (CdS QDs) into binary and ternary systems. These composites, labeled <em>io</em>TiO<sub>2</sub>-Au, …
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The equilibria and kinetics of certain ion exchange systems
… In recent years new and improved resins, such as macroporous and high density resins, have come onto the market, and the vital properties of these have not been well investigated. With this in mind, the H⁺, Na⁺ and Ca⁺² equilibria and kinetics of both a gel type strong acid cation resin (Cation …
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Capacitive deionization performance of bi-tortuous activated carbon electrodes coated with asymmetrically charged polyelectrolytes
… salt depletion and tortuous diffusion in the macroporous structure. In this work, we investigate the impact of bi-tortuosity on desalination performance by etching macroporous patterns along the length of activated carbon porous electrodes in a flow-by CDI architecture. Capacitive electrodes …
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Inverse opal hydrogel scaffolds as lymphoid microenvironments for the study of immune cell migration and immunotherapy
… or biochemistry). We developed and tested macroporous poly(ethylene glycol) (PEG) hydrogel scaffolds as a platform for lymphoid tissue models and immunotherapy. By applying the method of colloidal crystal templating to materials and length scales appropriate for soft tissues, PEG hydrogels …
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Effect of Topological Morphology on Optical Filtering Properties of Porous Silicon
Macroporous silicon samples of differing topological porous properties were manufactured by way of electrochemical etching. Different etching parameters (etching current, time, electrolyte concentration) were used on four different (in terms of crystal orientation and resistivity) types of samples …
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Porous Materials Prepared by Ultrasonic Spray Pyrolysis
The second approach was used to prepare meso- and macroporous carbons. A variety of carbon morphologies were observed (as indicated by SEM and TEM). Analysis of the carbon precursors using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) suggests that the decomposition …
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Artificial Liver Support and Related Systems
… of the knowledge gained from this study, novel macroporous hydrogel particulates were synthesised (as part of a separate project) and evaluated. Unlike the previously described commercially available adsorbents, these hydrogels were biocompatible. Although their adsorption efficiency was not as …
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The Design of Hydrogel Polymers for Artificial Liver Support Systems.
… and its gross interaction with blood. Secondly macroporous hydrogel membranes were examined. The pores of these are discrete physical entities created by freezing a monomer-solvent mixture prior to polymerization thereby creating a polymer matrix with large macropores running through it. These …
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Characterization and fabrication of nanoporous materials by template directed sol-gel methods
… studies focussed on the fabrication of macroporous titano/alumino and tinsilicate materials by dip infiltrating colloidal crystal templates with sol-gel mixtures. The sols were prehydrolysed in order to ensure atomic scale homogeneity of the final material. These materials were …
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Thin film Palladium-Ytrium membranes for hydrogen separation
… time. Thin (5 µm) Pd-Y films were deposited onto macroporous 316L stainless steel substrates by magnetron sputtering. Prior to deposition, a novel laser melting technique was employed in an attempt to reduce the surface roughness and pore size, thus facilitating the deposition of defect-free …
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Direct methanol fuel cell catalysts with controllable interface
… of Pt and the oxophilic metal(s); and as a macroporous film of the oxophilic metal on Pt. The model catalysts were comprehensively characterized for morphology, overall composition, distribution of the constituent metals, metal oxidation states, crystal structures; and the number of …
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Polymer-supported reagents for disinfection of water
A macroporous poly(styrene-co-divinylbenzene) resin having redox N,N-dichlorosulfonamide group, was modified for use in small-scale chlorination of potable water. The resin was synthesized via sulfonyl chloride by modification of the strong acid cation exchange resin, Amberlyst-15. The products …
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