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http://hdl.handle.net/10261/163230
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Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Campo DC | Valor | Lengua/Idioma |
---|---|---|
dc.contributor.author | Portela, Raquel | es_ES |
dc.contributor.author | Canela, María C. | es_ES |
dc.contributor.author | Sánchez, Benigno | es_ES |
dc.contributor.author | Marques, Fabielle C. | es_ES |
dc.contributor.author | Stumbo, Alexandre M. | es_ES |
dc.contributor.author | Tessinari, Ronan F. | es_ES |
dc.contributor.author | Coronado, Juan M. | es_ES |
dc.contributor.author | Suárez Gil, Silvia | es_ES |
dc.date.accessioned | 2018-04-06T08:38:56Z | - |
dc.date.available | 2018-04-06T08:38:56Z | - |
dc.date.issued | 2008-12-01 | - |
dc.identifier.citation | Applied Catalysis B: Environmental 84(3-4): 643-650 (2008) | es_ES |
dc.identifier.issn | 0926-3373 | - |
dc.identifier.uri | http://hdl.handle.net/10261/163230 | - |
dc.description.abstract | M-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.sponsorship | The 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.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation | S0505/AMB-0406/DETOX-H2S | es_ES |
dc.rights | openAccess | es_ES |
dc.subject | H2S | es_ES |
dc.subject | MCM-41 | es_ES |
dc.subject | Cr | es_ES |
dc.subject | Ce | es_ES |
dc.subject | Mesoporous | es_ES |
dc.subject | Photocatalysis | es_ES |
dc.subject | Visible light | es_ES |
dc.subject | Deactivation | es_ES |
dc.title | H2S photodegradation by TiO2/M-MCM-41 (M = Cr or Ce): Deactivation and by-product generation under UV-A and visible light | es_ES |
dc.type | artículo | es_ES |
dc.identifier.doi | 10.1016/j.apcatb.2008.05.020 | - |
dc.description.peerreviewed | Peer reviewed | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.1016/j.apcatb.2008.05.020 | es_ES |
dc.contributor.funder | Comunidad de Madrid | es_ES |
dc.contributor.funder | Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro | es_ES |
dc.contributor.funder | Fundación Carolina | es_ES |
dc.relation.csic | No | es_ES |
oprm.item.hasRevision | no ko 0 false | * |
dc.identifier.funder | http://dx.doi.org/10.13039/501100004586 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/100012818 | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.openairetype | artículo | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
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Fichero | Descripción | Tamaño | Formato | |
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Portela_H2S_PHOTODEGRADATION_AppCatB-postprint_2008.pdf | 1,61 MB | Adobe PDF | Visualizar/Abrir |
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