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dc.contributor.authorPérez Molina, Álvaro
dc.contributor.authorMorales Torres, Sergio
dc.contributor.authorMaldonado Hodar, Francisco José 
dc.contributor.authorPastrana-Martínez, Luisa M.
dc.identifier.citationPérez-Molina, Á., Morales-Torres, S., Maldonado-Hódar, F. J., & Pastrana-Martínez, L. M. (2020). Functionalized Graphene Derivatives and TiO2 for High Visible Light Photodegradation of Azo Dyes. Nanomaterials, 10(6), 1106. [doi:10.3390/nano10061106]es_ES
dc.description.abstractFunctionalized graphene derivatives including graphene oxide (GO), reduced graphene oxide (rGO), and heteroatom (nitrogen/sulphur (N/S) or boron (B))-doped graphene were used to synthesize composites with TiO2 (T). The photocatalytic performance of composites was assessed for the degradation of Orange G dye (OG) under simulated solar light. All the prepared graphene derivatives—TiO2 composites showed better photocatalytic performance than bare TiO2. A higher photocatalytic activity was found for the composites containing GO and N/S co-doped rGO (kapp = 109.2 × 10−3 and 48.4 × 10−3 min−1 , for GO-T and rGONS-T, respectively). The influence of both initial solution pH and the reactive species involved in the OG degradation pathway were studied. The photocatalytic activity of the samples decreased with the increase of the initial pH (from 3.0 to 10.0) due to the occurrence of electrostatic repulsive forces between the photocatalysts surface and the molecules of OG, both negatively charged. The use of selective scavengers showed that although the photogenerated holes dominate the degradation mechanism, radicals and singlet oxygen also participate in the OG degradation pathway. In addition, reutilization experiments indicated that the samples were stable under the reaction conditions used.es_ES
dc.description.sponsorshipERDF/Ministry of Science, Innovation and Universities-State Research Agency RTI2018-099224-B-I00es_ES
dc.rightsAtribución 3.0 España*
dc.subjectGraphene oxidees_ES
dc.subjectHeteroatom dopinges_ES
dc.subjectOrange Ges_ES
dc.titleFunctionalized Graphene Derivatives and TiO2 for High Visible Light Photodegradation of Azo Dyeses_ES

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Atribución 3.0 España
Except where otherwise noted, this item's license is described as Atribución 3.0 España