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dc.contributor.authorPortela, Raqueles_ES
dc.contributor.authorCanela, María C.es_ES
dc.contributor.authorSánchez, Benignoes_ES
dc.contributor.authorMarques, Fabielle C.es_ES
dc.contributor.authorStumbo, Alexandre M.es_ES
dc.contributor.authorTessinari, Ronan F.es_ES
dc.contributor.authorCoronado, Juan M.es_ES
dc.contributor.authorSuárez Gil, Silviaes_ES
dc.date.accessioned2018-04-06T08:38:56Z-
dc.date.available2018-04-06T08:38:56Z-
dc.date.issued2008-12-01-
dc.identifier.citationApplied Catalysis B: Environmental 84(3-4): 643-650 (2008)es_ES
dc.identifier.issn0926-3373-
dc.identifier.urihttp://hdl.handle.net/10261/163230-
dc.description.abstractM-MCM-41 molecular sieves (M = Ce or Cr) were prepared by a hydrothermal method and impregnated with TiO2. The materials were characterized by XRD, N2 adsorption–desorption, DRS and XPS. Their potential application to photooxidize H2S in a wet gas stream was tested in a continuous flow reactor operating at a flow rate of 110 mL min−1 at 50% relative humidity and using 30 ppmv of the pollutant. The photocatalytic efficiency using UV-A and visible light was compared to the activity of TiO2/MCM-41 without heteroatoms incorporated into the MCM-41 structure. It was found that the incorporation of Ce did not improve the performance of TiO2/MCM-41, but Cr-containing samples presented higher initial efficiency and were able to photooxidize H2S without formation of SO2 as a by-product, in contrast to the other prepared samples and to Degussa P-25 TiO2. Moreover, no other gaseous by-product was detected. The isomorphic incorporation of Cr into the structure of MCM-41 followed by TiO2 incorporation produced photocatalysts that presented good adsorption capacity and were much more active under visible light than under UV-light. This performance represents an important advantage for solar applications. Their photoactivity depended on the concentration of chromium; the highest efficiency was attained with samples with a Si/Cr ratio of 50. Finally, deactivation was observed as a consequence of sulfate accumulation on the surface of the catalyst and reduction of Cr6+.es_ES
dc.description.sponsorshipThe authors would like to acknowledge Comunidad de Madrid (DETOX-H2S S-0505/AMB/0406), FAPERJ and Fundación Carolina for the funding and IQ-Unicamp for DRS–UV–vis analysis.es_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.relationS0505/AMB-0406/DETOX-H2Ses_ES
dc.rightsopenAccesses_ES
dc.subjectH2Ses_ES
dc.subjectMCM-41es_ES
dc.subjectCres_ES
dc.subjectCees_ES
dc.subjectMesoporouses_ES
dc.subjectPhotocatalysises_ES
dc.subjectVisible lightes_ES
dc.subjectDeactivationes_ES
dc.titleH2S photodegradation by TiO2/M-MCM-41 (M = Cr or Ce): Deactivation and by-product generation under UV-A and visible lightes_ES
dc.typeartículoes_ES
dc.identifier.doi10.1016/j.apcatb.2008.05.020-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.apcatb.2008.05.020es_ES
dc.contributor.funderComunidad de Madrides_ES
dc.contributor.funderFundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiroes_ES
dc.contributor.funderFundación Carolinaes_ES
dc.relation.csicNoes_ES
oprm.item.hasRevisionno ko 0 false*
dc.identifier.funderhttp://dx.doi.org/10.13039/501100004586es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/100012818es_ES
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.openairetypeartículo-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
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