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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 228 for “"Carbons"”.
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Toxic Gas Sensing on Nanoporous Carbons
<p>Activated carbons, either synthetic, developed in our laboratory, or commercial, were prepared or further modified, in order to introduce specific heteroatoms such as oxygen, nitrogen and sulfur to their matrices. Chips coated with thin layers of the carbon samples were used for the sensing of …
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Heteroatom-containing carbons for high energy density supercapacitor
… those for batteries, new heteroatom-containing carbons in the form of particles and three-dimensional films were investigated. A nitrogen-containing material, acrodam, was chosen as the carbon precursor due to the inexpensiveness, high carbonization yield, oligomerizability, etc. The carbon …
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Sustainable biomass-derived hydrothermal carbons for energy applications
… In order to introduce porosity in the HTC carbons derived from lignocellulosic biomass, KOH chemical activation was investigated as an HTC post-synthesis functionalisation step. These studies demonstrated that HTC carbons are excellent precursors for the production of highly microporous …
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THE STRUCTURE AND REACTIVITY OF SOME METALLURGICAL CARBONS
… with porosity data. Selected metals in the carbons have been determined by flame photometry, atomic absorption spectroscopy and Mossbauer spectroscopy. The composition of residual mineral matter (ash) has been investigated by X-ray diffraction. The chemical compositions of the coal …
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The urea adducts of certain esters containing twenty carbons
<p>Urea has the interesting and unexpected property of forming solid complexes with many straight-chained organic compounds. So selective is the formation of these complexes with linear aliphatic compounds that it provides a means of separation form the analogous branched and cyclic compounds. …
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Functional nanostructured hydrothermal carbons for sustainable technologies : heteroatom doping and superheated vapor
… doped carbon. To assess the novel hydrothermal carbons in terms of their potential for electrochemical applications, materials with defined nano-architectures and high surface areas were synthesized via templated, as well as template-free routes. Sulfur and/or nitrogen doped carbon hollow …
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Evaluation of different powdered activated carbons in the control of chlorite ion
Twelve different powdered activated carbons (PACs) were screened under laboratory conditions to determine their performance in the removal of chlorite ions (ClO₂⁻) and in the production of chloride ions (Cl⁻) and chlorate ions (ClO₃⁻) during that removal. All screenings were conducted in reagent …
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Synthesis and characterization of chemically treated activated carbons for adsorption of trace contaminants
… is the use of dry adsorbents such as activated carbons.
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SELECTIVE ADSORPTION OF DIBENZOTHIOPHENES ON ACTIVATED CARBONS WITH METAL SPECIES DEPOSITED ON THEIR SURFACES
"The objective of this thesis is an investigation of influence of porosity, surface chemistry, material composition and effects of metals oncarbon adsorbents in desulfurization of liquid fuels. Materials are derived from poly (4-styrenesulfonic acid-co-maleic acid) salts (sodium or transition …
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Developing and Investigating the Scope of Quinone-Functionalised Carbons for Electrochemical Carbon Dioxide Capture
… performance of anthraquinone-functionalised carbons was then tested in the presence of oxygen. CO2 capture was observed at approximately 0.1 – 0.2 mmol g–1, similar to values seen under pure CO2, but the Faradaic efficiency lowered by 10%. The anthraquinone-mediated pH swing was also tested …
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Kinetics, mass transfer, and mass re-equilibrium for arsenate adsorption on iron oxide-based carbons
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI-COLUMBIA AT AUTHOR'S REQUEST.] Removal of arsenic (As) from drinking water sources is much needed worldwide, and small water treatment systems, such as point-of-use (POU) treatment, could be an effective solution for residential applications. …
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Electrochemical analysis of interface structures and functionalization in graphitic carbons for Na-ion and flow battery electrodes
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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Salts as highly diverse porogens : functional ionic liquid-derived carbons and carbon-based composites for energy-related applications
… strategy toward highly porous functional carbons with tunable porosity using ordinary salts as porogen (denoted as “salt templating”) 2)The one-pot synthesis of porous metal nitride containing functional carbon composites 3)The combination of both approaches, enabling the generation of …
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Versatile, direct nanocasting strategy to N-rich ordered mesoporous carbons for selective post-combustion CO2 capture and energy storage
L'abstract è presente nell'allegato / the abstract is in the attachment
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Effect of pH on adsorption and desorption equilibria and kinetics of 2-nitrophenol and phenol onto two activated carbons.
… phenol as organic pollutants and F-400 and WV-B carbons as adsorbents. The batch adsorption isotherms study showed that at pHs less than pK$\rm\sb{a}$ (undissociated form of compounds), 2NP and phenol adsorption was markedly higher than at pHs greater than pK$\rm\sb{a}$ (dissociated form of …
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