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Kinetics of the Degradation of l-Cysteine at Freshly Prepared Nano-sized MnO2 Surfaces in the Absence and Presence of TX-100

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dc.contributor.authorAltaf, Mohammad.
dc.contributor.authorJaganyi, Deogratius.
dc.date.accessioned2024-06-28T09:19:50Z
dc.date.available2024-06-28T09:19:50Z
dc.date.issued2014-01-30
dc.description.abstractNano-sized colloidal manganese dioxide was synthesized at room temperature by a chemical method in neutral medium without a stabilizing agent. The obtained MnO2 nano-sized colloid was found to be stable for several months and was characterized by means of UV–Vis spectroscopy, energy-dispersive X-ray spectrometer (EDX) and transmission electron microscopy. The EDX analysis confirmed the presence of Mn and O in the sample. The paper reports on the use of nano-sized colloidal manganese dioxide as an oxidant in the oxidation of cysteine (Cyst) in the absence and presence of surfactant (TX-100) at 35 °C. The study was carried out as functions of [MnO2], [Cyst], [HClO4] and temperature. The results show that the reaction proceeds through fast adsorption of Cyst onto the surface of the colloidal MnO2. Pseudo-first-order rate constants were found to increase with the increase in [TX-100]. This paper reports values of the reaction rates and activation parameters in the absence and presence of surfactant and proposes a plausible mechanism.
dc.identifier.citationAltaf, M., Jaganyi, D. Kinetics of the Degradation of l-Cysteine at Freshly Prepared Nano-sized MnO2 Surfaces in the Absence and Presence of TX-100. J Solution Chem 43, 269–282 (2014)
dc.identifier.urihttps://doi.org/10.1007/s10953-013-0126-3
dc.identifier.urihttps://erepository.mku.ac.ke/handle/123456789/5948
dc.language.isoen
dc.publisherJournal of Solution Chemistry
dc.titleKinetics of the Degradation of l-Cysteine at Freshly Prepared Nano-sized MnO2 Surfaces in the Absence and Presence of TX-100
dc.typeArticle
dspace.entity.typePublication
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