Nanoscale manganese oxide octahedral molecular sieves (OMS-2) as efficient photocatalysts in 2-propanol oxidation

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dc.contributor.author King’ondu, Cecil K.
dc.contributor.author Iyer, Aparna
dc.contributor.author Galindo, Hugo
dc.contributor.author Sithambaram, Shanthakumar
dc.contributor.author Chen, Chun-Hu
dc.contributor.author Suib, Steven L.
dc.date.accessioned 2015-04-15T06:44:30Z
dc.date.available 2015-04-15T06:44:30Z
dc.date.issued 2010-03
dc.identifier.citation Applied Catalysis A: General Volume 375, Issue 2, 1 March 2010, Pages 295–302 en_US
dc.identifier.uri http://www.sciencedirect.com/science/article/pii/S0926860X10000347
dc.identifier.uri http://repository.seku.ac.ke/handle/123456789/1162
dc.description doi:10.1016/j.apcata.2010.01.012 en_US
dc.description.abstract Crystalline tunnel structure cryptomelane type manganese oxides (OMS-2) have been studied as photocatalysts for the selective oxidation of 2-propanol to acetone. The reaction is carried out with visible light irradiation at room temperature. The activities of various K-OMS-2 and metal doped OMS-2 (M-OMS-2) catalysts prepared by different synthesis procedures have been evaluated. K-OMS-2 and M-OMS-2 (M = Fe, Ni) with nanorod morphology were the most active photocatalysts. Conversions obtained for these catalysts ranged from 50 to 15%. K-OMS-2 fibers gave only 5–6% conversion. All reactions gave 100% selectivity to acetone. The reusability of the K-OMS-2 catalyst was also tested. Characterization of K-OMS-2 catalysts was done using several techniques like temperature programmed desorption, UV–vis spectroscopy, average oxidation state analysis, XRD, BET and FE-SEM. As suggested by the photochemical and characterization data, synthesis methodology, morphology, mixed valency and the release of oxygen from the OMS-2 structure are important factors for the design of active OMS-2 photocatalysts. XRD and FTIR were also used to study structural changes in the catalyst after photolysis. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Photocatalysis en_US
dc.subject Oxidation en_US
dc.subject Manganese oxide octahedral molecular sieves en_US
dc.subject Oxygen evolution en_US
dc.title Nanoscale manganese oxide octahedral molecular sieves (OMS-2) as efficient photocatalysts in 2-propanol oxidation en_US
dc.type Article en_US


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