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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 10 of 10 for “"Laser raman spectroscopy"”.
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Reduced molybdenum oxidation states in hydrodesulfurization catalysis by Chevrel phases
… for 1-butene HYD;X-ray powder diffraction and laser Raman spectroscopy analysis of the used (10 hours of thiophene reaction) catalysts indicated that the bulk structures were stable under reaction conditions. XPS analysis demonstrated that reduced molybdenum oxidation states were present at the …
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Some novel aspects of DC and AC powder electroluminescence (DCEL)
… The DCEL forming process was investigated using Laser-Raman spectroscopy. This showed no changes in copper concentration in the formed layer of a DCEL device following the forming process, suggesting that the forming process may be due to oxidation. Indium tin oxide (ITO) conductive-coated …
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Structure and Ozone Decomposition Reactivity of Supported Manganese Oxide Catalysts
… kinetics. X-ray diffraction (XRD), in-situ laser Raman spectroscopy, temperature programmed oxygen desorption, surface area measurements, extended and near edge x-ray absorption fine structure (EXAFS and NEXAFS) showed that the manganese oxide was highly dispersed on the surface of the …
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Detection limits of CO₂in fluid inclusions using microthermometry and Raman spectroscopy and the spectroscopic characterization of CO₂
… limits (MDLs) using microthermometry and laser Raman spectroscopy are established in terms of P<sub>CO₂</sub> using synthetic H₂O-CO₂ inclusions. The purpose of the microthermometric experiments was to examine the diagnostic CO₂ phase changes and determine the quantity of CO₂ necessary to …
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Contributions and New Methods in Paleontology: Geochemical, Ultrastructural, and Microstructural Characterization of Archean, Proterozoic, and Phanerozoic Fossils
… microscopy, transmission electron microscopy, laser Raman spectroscopy, electron microprobe, secondary ion mass spectroscopy, and focused ion beam electron microscopy. Moving into the Neoproterozoic (1000–542 Ma), the third primary research chapter utilizes field emission scanning electron …
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Development and Application of Gas-phase Raman Spectroscopy Techniques for Analysis of Carbon Nanotube Synthesis Processes
… of synthesis parameters. In this study, two Raman-based spectroscopic techniques were tested for the realisation of in situ measurements in a FC-CVD reactor. Cavity-enhanced Raman spectroscopy (CERS) was found to be a powerful low-cost high-resolution tool for analysis of non-reacting gaseous …
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Gas-Phase Epoxidation of Ethylene and Propylene
… as gold (+1) cyanide. X-ray absorption spectroscopy demonstrated that catalysts which produce propylene oxide in the presence of hydrogen and oxygen mixtures had supported gold (+3) oxide nanoparticles of 3 nm size after synthesis, which were reduced to gold metal at reaction conditions. …
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Kinetics and Mechanism of Ozone Decomposition and Oxidation of Ethanol on Manganese Oxide Catalysts
… This dissertation describes the use of in situ laser Raman spectroscopy combined with kinetic measurements and dynamic experiments to determine the mechanism of catalytic reactions. Two cases involving ozone reactions on manganese oxide catalysts were treated. Manganese oxide was chosen because …
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In situ laser Raman studies of the mechanism of ethanol oxidation over supported molybdenum oxide
… molybdenum oxide was studied by in situ laser Raman spectroscopy, deuterium isotopic substitution, together with steady-state and transient reactivity and kinetic measurements. The combination of techniques allows a complete description of the mechanism of ethanol oxidation on MoO₃ …
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LASER-RAMAN ΦΑΣΜΑΤΑ ΟΥΣΙΩΝ ΕΝ ΠΡΟΣΡΟΦΗΣΕΙ
THE SUBJECT OF THIS THESIS IS THE STUDY OF THE LASER-RAMAN SPECTRA OF CERTAIN SUBSTANCES IN THE STATE OF ADSORPTION ON THE FOLLOWING SUBSTRATES: SIO2, AL2O3, SIO2, AL2O3 ON SIO2 AND BENTONITE. THE SUBSTANCES USED WERE NAPHTHALENE, TRIPHENYLMETHANE, (AND SOME OF ITS DERIVATIVES), TRIPHENYLAMINE, …