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Type I vs Type II photodegradation of pollutants

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Type I vs Type II photodegradation of pollutants

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dc.contributor.author Martínez-Haya, Rebeca es_ES
dc.contributor.author Miranda Alonso, Miguel Ángel es_ES
dc.contributor.author Marín García, Mª Luisa es_ES
dc.date.accessioned 2020-06-12T03:34:09Z
dc.date.available 2020-06-12T03:34:09Z
dc.date.issued 2018-09-01 es_ES
dc.identifier.issn 0920-5861 es_ES
dc.identifier.uri http://hdl.handle.net/10251/146186
dc.description.abstract [EN] Rose Bengal (RB) is a widely used photocatalyst due to its high quantum yield of singlet oxygen (O-1(2)) formation. Hence, when RB has been employed for wastewater remediation, the observed photodegradation has been attributed to reaction between the pollutants and the O-1(2) formed (Type II mechanism). However, RB could also react, in principle, via electron transfer (Type I mechanism). Herein, competition between Type I vs Type II oxidation has been investigated for RB in the photodegradation of emerging pollutants such as diclofenac (DCF) and acetaminophen (ACP). In parallel, the photocatalyst perinaphthenone (PN) has also been evaluated for comparison. The degree of removal achieved for both pollutants in aerated/deaerated aqueous solutions irrespective of the employed photocatalyst does not support the involvement of O-1(2) as the main species responsible for removal of the pollutants. Photophysical experiments showed that the triplet excited states of RB and PN are efficiently quenched by both DCF and ACP. Moreover, O-1(2) emission was also quenched by DCF and ACP. Thus the contribution of Type I versus Type II in the photodegradation has been evaluated from the experimentally determined rate constants. Nevertheless, at the upper limit for the typical concentration of emerging pollutants (10(-5) M) photodegradation proceeds mainly via Type I mechanism. es_ES
dc.description.sponsorship Financial support from Spanish Government (Grants SEV-2016-0683 and CTQ2012-38754-C03-03) and Generalitat Valenciana (Prometeo Program) is gratefully acknowledged. We also thank support from VLC/Campus. R. Martinez-Haya thanks financial support from Spanish Government (Grant SEV-2012-0267). es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation GV/PROMETEO es_ES
dc.relation MINISTERIO DE ECONOMIA Y COMPETITIVIDAD/SEV-2012-0267 es_ES
dc.relation MINECO/SEV-2016-0683 es_ES
dc.relation MINECO/CTQ2012-38754-C03-03 es_ES
dc.relation.ispartof Catalysis Today es_ES
dc.rights Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) es_ES
dc.subject Excited species es_ES
dc.subject Electron transfer es_ES
dc.subject Laser flash photolysis es_ES
dc.subject Photo-oxidation es_ES
dc.subject Singlet oxygen es_ES
dc.subject.classification QUIMICA ORGANICA es_ES
dc.title Type I vs Type II photodegradation of pollutants es_ES
dc.type Artículo es_ES
dc.type Comunicación en congreso es_ES
dc.identifier.doi 10.1016/j.cattod.2017.10.034 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Química - Departament de Química es_ES
dc.description.bibliographicCitation Martínez-Haya, R.; Miranda Alonso, MÁ.; Marín García, ML. (2018). Type I vs Type II photodegradation of pollutants. Catalysis Today. 313:161-166. https://doi.org/10.1016/j.cattod.2017.10.034 es_ES
dc.description.accrualMethod S es_ES
dc.relation.conferencename 5th European Conference on Environmental Applications of Advanced Oxidation Processes (EAAOP-5) es_ES
dc.relation.conferencedate Junio 25-29,2017 es_ES
dc.relation.conferenceplace Prague, Czech Republic es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.cattod.2017.10.034 es_ES
dc.description.upvformatpinicio 161 es_ES
dc.description.upvformatpfin 166 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 313 es_ES
dc.relation.pasarela S\347417 es_ES
dc.contributor.funder Generalitat Valenciana es_ES
dc.contributor.funder Ministerio de Economía y Empresa es_ES
dc.contributor.funder Ministerio de Economía y Competitividad es_ES


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