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Showing 1 to 19 of 19 for “"copper nanoparticles"”.
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The Electroreduction of Carbon Dioxide on Porous Copper Nanoparticles
<p>Copper nanoparticles of porous, controlled structure were synthesized using the sacrificial support method (SSM). The precursor weight percent (wt%) of copper (Cu) and fumed silica (EH-5) was varied to determine the optimum ratio for this material. The precursors were reduced at i) 350°C in a 7% …
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TiO2-supported copper nanoparticles prepared via ion exchange for photocatalytic hydrogen production
… the findings from a study on TiO2-supported copper nanoparticles (Cu/TiO2) synthesised using an ion exchange (IE) – heat treatment process. The IE Cu/TiO2 particles were assessed as photocatalysts for hydrogen generation from an aqueous solution (10 vol. %) of methanol. Photocatalytic …
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Biosynthesis of copper nanoparticles using a bioflocculant from Alcaligenis faecalis, characterization and its application
… water purification. Most common method used for nanoparticles formation such as physical (condensation evaporation) and chemical (oxidation and reduction) are very efficient traditional methods. However, both methods have been found to have some shortcomings. One may require a large amount of …
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Green synthesis of copper nanoparticles using Lannea discolor (Sond.) Engl. and evaluation of their biological efficacy
… compatible, and has been used to synthesize nanoparticles with advanced therapeutic potential. Lannea discolor, commonly known as “dikbas,” occurs in southern Africa and is extensively utilized as a traditional medicine. This study explores the phytochemical composition of the plant extracts, …
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Modification of thin film composite (TFC) membrane by incorporation with copper nanoparticles (Cu-NPs) for antibacterial properties
… of reverse osmosis (RO) desalination process. Copper is known for its antimicrobial properties and is easily available with low cost. In this paper, copper nanoparticles (Cu-NPs) with a mean diameter of15nm were synthesized by the reduction of copper (II) chloride with sodium borohydride …
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In-Situ Studies of Copper Nanoparticles Using a Novel Tandem Ultra-High Vacuum Particle Production Chamber Transmission Electron Microscope
… we have shown specific contaminants' effects on copper nano-particle growth mechanics, morphology, and sintering. Our findings contribute significantly to our understanding of nano-particles and shed light on how to approach the ideal nanophase material.
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Highly conductive sodium dodecyl sulphate treated poly (3,4-ethylendioxylthiophene) : polystyrene sulfonate (pedot: pss) containing copper nanoparticles for flexible organic solar cells
… doped with sodium dodecyl sulphate (SDS) and copper nanoparticles (CuNPs) are investigated. Solutions of PEDOT: PSS containing different amounts of SDS and copper nanoparticles were prepared to determine the optimum loading levels. The solutions were sonicated and then deposited by spin …
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Highly conductive sodium dodecyl sulphate treated poly (3,4-ethylendioxylthiophene) : polystyrene sulfonate (pedot: pss) containing copper nanoparticles for flexible organic solar cells
… doped with sodium dodecyl sulphate (SDS) and copper nanoparticles (CuNPs) are investigated. Solutions of PEDOT: PSS containing different amounts of SDS and copper nanoparticles were prepared to determine the optimum loading levels. The solutions were sonicated and then deposited by spin …
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Design of heterogeneous bifunctional catalyst for upgrading bioethanol through the Guerbet reaction
… was proposed. Among several metals tested, copper was found to be the most selective catalyst for dehydrogenation either as unsupported powder or supported nanoparticles. A synergetic effect was obtained from deposition of the copper nanoparticles on the titania surface since it was found to …
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Synthesis of Nanomaterials for Optical and Catalytic Studies
… the Cu source was developed to prepare metallic copper nanoparticles NPs with sizes that can be tuned. Copper particles with sizes ranging from 46 to 90 nm were synthesized and a clear correlation with plasmon absorption was obtained. In order to study the application and extend the usability of …
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Novel contrasts in photoacoustic tomography
… patterns, endogenous cellular chromophores, nanoparticles, small-molecule dyes and genetically-encoded proteins. With these novel contrasts, the proof-of-concept applications of PAT have been extended to include homogenous flow measurements, targeted angiogenesis imaging and therapy, …
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A study of the polarimetric characteristics of planar chiral mesoscopic structures
… response of chiral metamaterial structures and nanoparticles. In the theoretical part of this work, fundamental concepts related to chirality are defined. Previous contributions to quantify the chirality of planar shapes are reviewed. The prospects of different expressions based on triangle …
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Surface chemistry of metal oxide materials: from metalorganic and organic reactions to gas sensing
… a common chemical vapor deposition precursor, copper hexafluoroacetylacetonate vinyl trimethyl silane, Cu(hfac)(VTMS), to grow copper nanoparticles on commercial ZnO powder. This deposition process is investigated by high-vacuum Fourier transform infrared (FT-IR) spectroscopy, X-ray …
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Engineering Biological Materials for Carbon Capture and the Electrochemical Reduction of Carbon Dioxide to Light Hydrocarbons
… are light-crosslinked and metallized to create copper electrodes that explore the effect of pore structure on catalyst performance. Second, catalysts made via copper electrodeposition are modified by viral proteins to create nanostructured, crystalline electrodes that shift product distributions …
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Green synthesis, characterization and laser irradiation of silver nanoparticles and its bimetallic nanoparticles
Green synthesis of metallic nanoparticles offered an alternative and eco-friendly method for fabricating nanoparticles compared to chemical and physical methods. The current study aimed to manipulate silver nanoparticles (Ag NPs) synthesized in Murraya koenigii leaf extract to fabricate …
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Electrochemical Deposition of Copper and Zinc Nanomaterials at Polypyrrole Thin Films
The electrodeposition of copper- or zinc-based nanomaterials was performed on the top of polypyrrole-polystyrene sulfonate (PPy-PSS) thin films from their respective sulfate solutions in presence of dissolved oxygen. Three main processes were responsible for the formation of the nanomaterials, …
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Studies on the Conversion of Atmospheric Carbon Dioxide to Methanol
… thermochemical hydrogenation of CO₂ to methanol, copper-based catalysts are the most established formulation, comprising metallic copper and a metal oxide support. Here, zinc oxide (ZnO), zirconia (ZrOₓ), and ceria (CeOₓ) were studied for use in copper-based catalysts, demonstrating the role of …