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Showing 1 to 18 of 18 for “"Sonochemical"”.
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Ultrasound induced cavitation and sonochemical effects
… to understand the fundamental mechanisms of the sonochemical phenomenon. Several fundamental mechanisms, which are believed to be critical in understanding the unusual experimentally observed sonoluminescence and sonochemical behavior, are revealed. First, not all chemical reactions associated …
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The sonochemical synthesis of inorganic and biological materials
Understanding and harnessing the interaction between energy and matter is a basic scientific endeavor. The use of high intensity ultrasound to initiate chemical reactions, as opposed to traditional energy sources such as heat and light, has opened new avenues of research. The mechanism of …
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Nanostructured catalytic and magnetic materials: Sonochemical synthesis and characterization
Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:58:59Z Item is restricted indefinitely.
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Polymeric Melodies: Polyetherimide Modification-Based Acoustic Membranes and Sonochemical Degradation of Polystyrene
The compatibilization of polymers for nanomaterials and the degradation of commodity plastics are two major areas in polymer chemistry. To achieve composite materials that meet the demands of modern technologies, polymers are modified using a vast array of chemistries, enabling the practical and …
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Carbon nanotube supported electrocatalysts for polymer electrolyte membrane fuel cells
… have been studied as a new catalyst support. A sonochemical treatment method was applied for surface oxidation of multiwalled carbon nanotubes to achieve highly dispersed nanoparticles on them. Several surface functional groups were generated on the nanotubes, which contribute to the binding of …
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The Sonochemistry of Some Metal Carbonyl Complexes (Iron, Chromium)
… of a wide range of organic solvents to support sonochemical reactions. Sonication of iron pentacarbonyl, neat or in hydrocarbon solvents, produces triiron dodecacarbonyl and finely divided iron powder. The ratio of these products may be varied by changing the vapor pressure of the solvent. The …
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Mechanistic Study of Pollutant Degradation
… pollutant degradation in Fenton reactions and sonochemical reactions. Fenton degradation uses hydroxyl radical to oxidize organic compounds. The radical is produced by catalytic decomposition of hydrogen peroxide with Fe(II). Further research has found that addition of cyclodextrins can enhance …
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Hydroxyl Radical Production via Acoustic Cavitation in Ultrasonic Humidifier Systems
… water also have potential for inducing sonochemical reactions for chemicals present in water. This research focuses on examining oxidants formed within ultrasonic humidifiers, as well as the oxidants effects of contaminants in water used in the systems. Hydroxyl radicals were found using …
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The development and applications of the combined use of NMR and ultrasound
… report was to observe the first ever in-situ sonochemical reaction in the NMR Spectrometer in the megahertz region of ultrasound. Several reactions were investigated as potential systems for a sonochemical reaction followed by NMR spectroscopy. The primary problem to resolve when applying …
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Self-assembly of lead-halide-perovskite laser particles
… laser particles in a lab flask. I discovered a sonochemical method to produce a large quantity (10 billions/L) of high-quality LHP micro- and sub-micron particles in a polar solvent within minutes. This method enabled me to coat the surface of individual CsPbBr3 laser particles using …
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Biopolymer-mediated analyte detection via photoluminescence modulation of single-walled carbon nanotubes
… as a function of SWNT aggregation, as well as sonochemical effects on photoluminescence. Nanotube photoluminescence and scattering are then detected, via imaging and spectrometry, from within live murine macrophage cells, and shown to be extremely resilient, demonstrating the potential of …
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Ultrasonic synthesis of materials for energy conversion devices
… During the research, it was found that sonochemical synthesis is capable of synthesizing silicon nanoparticles in much faster rate and the resultant particles outperform other materials synthesized by a conventional reaction route
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SYNTHESIS OF EFFICIENT PHOTOCATALYSTS IN EXTREME TEMPERATURE CONDITIONS FOR THE DEGRADATION OF AIR POLLUTANTS.
… final stage, such as sol-gel, solid-state, and sonochemical (in ascending order of sustainability), emerged as the most eco-friendly approaches for STO fabrication. These insights provided valuable guidance for the continued development of sustainable, novel, and efficient STO-based …
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NMR spectroscopy in the presence of ultrasound and other perturbations
… widths for 27AI in the glass. Investigations of sonochemical reactions for in situ rate measurements by NMR have been made. 8y using the Weissler reaction7, it has been shown that ultrasonic cavitation is possible up to 10MHz. Preliminary studies have been carried out into the rate of ultrasonic …
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Activating Mn(III)F3 towards homo- and heterogeneous oxidative catalysts
… (∼100 mg; ∼90%). The second method relied on sonochemical methods and provided much larger quantities of product (multi-gram). BET (Brunauer-Emmett-Teller surface area analysis) adsorption studies on the small-scale batch of UiO-67-bipy provided an average particle size of 22 nm and a surface …
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Degradation of polycyclic aromatic hydrocarbons in water: Alternative treatments to conventional processes.
… from other photochemical technologies based on sonochemical reactions. It was found that the technology achieving the highest microorganism elimination in the shortest time and with the lowest electrical costs results was the UV-C/H2O2 process. Nevertheless, in spite of that, it is worth noting …
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Variables Governing the Initial Stages of the Synergisms of Ultrasonic Treatment of Biochar in Water Saturated with Carbon Dioxide
This work investigates the initial stage of the synergistic processes of acoustic treatment of biochar in water saturated with CO2 (AIChE Journal, 2014;60:1054-1065). Treatments with switchgrass and miscanthus biochars have been conducted to examine the effects of acoustic intensity, biochar/H2O …
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High Intensity Ultrasound Processing of AlNi (50 wt.% Ni) Particles for Electrocatalytic Water Splitting
… compared to untreated alloy particles, placing sonochemical processing of metals/metal alloys is among the most promising methods for creation of an electrocatalytically active interface for hydrogen evolution. The experimentally determined electrocatalytic activity of the Al3Ni2 intermetallic …