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Unravelling the Photocatalytic Behavior of All-Inorganic Mixed Halide Perovskites: The Role of Surface Chemical States
dc.contributor.author | Gualdrón Reyes, Andrés Fabián | |
dc.contributor.author | Rodriguez-Pereira, Jhonatan | |
dc.contributor.author | Amado - González, Eliseo | |
dc.contributor.author | Rueda-P, Jorge | |
dc.contributor.author | Ospina, Rogelio | |
dc.contributor.author | Masi, Sofia | |
dc.contributor.author | YOON, SEOG JOON | |
dc.contributor.author | Tirado, Juan | |
dc.contributor.author | Jaramillo, Franklin | |
dc.contributor.author | Agouram, Said | |
dc.contributor.author | Muñoz-Sanjosé, Vicente | |
dc.contributor.author | Gimenez, Sixto | |
dc.contributor.author | Mora-Sero, Ivan | |
dc.date.accessioned | 2020-01-13T08:22:31Z | |
dc.date.available | 2020-01-13T08:22:31Z | |
dc.date.issued | 2019-12 | |
dc.identifier.citation | Andrés F. Gualdrón-Reyes, Jhonatan Rodríguez-Pereira, Eliseo Amado-González, Jorge Rueda-P, Rogelio Ospina, Sofia Masi, Seog Joon Yoon, Juan Tirado, Franklin Jaramillo, Said Agouram, Vicente Muñoz-Sanjosé, Sixto Giménez, and Iván Mora-Seró. Unravelling the Photocatalytic Behavior of All-Inorganic Mixed Halide Perovskites: The Role of Surface Chemical States. ACS Applied Materials & Interfaces, 2020 12 (1), 914-924 | |
dc.identifier.issn | 1944-8244 | |
dc.identifier.issn | 1944-8252 | |
dc.identifier.uri | http://hdl.handle.net/10234/185722 | |
dc.description.abstract | Within the most mesmerizing materials in the world of optoelectronics, mixed halide perovskites (MHPs) have been distinguished because of the tunability of their optoelectronic properties, balancing both the light-harvesting efficiency and the charge extraction into highly efficient solar devices. This feature has drawn the attention of analogous hot topics as photocatalysis for carrying out more efficiently the degradation of organic compounds. However, the photo-oxidation ability of perovskite depends not only on its excellent light-harvesting properties but also on the surface chemical environment provided during its synthesis. Accordingly, we studied the role of surface chemical states of MHP-based nanocrystals (NCs) synthesized by hot-injection (H-I) and anion-exchange (A-E) approaches on their photocatalytic (PC) activity for the oxidation of β-naphthol as a model system. We concluded that iodide vacancies are the main surface chemical states that facilitate the formation of superoxide ions, O2●–, which are responsible for the PC activity in A-E-MHP. Conversely, the PC performance of H-I-MHP is related to the appropriate balance between band gap and a highly oxidizing valence band. This work offers new insights on the surface properties of MHP related to their catalytic activity in photochemical applications. | ca_CA |
dc.format.extent | 11 p. | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | American Chemical Society | ca_CA |
dc.relation.isPartOf | ACS Applied Materials & Interfaces, 2020, vol. 12, no 1 | ca_CA |
dc.rights | Copyright © American Chemical Society | ca_CA |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | * |
dc.subject | surface chemical states | ca_CA |
dc.subject | iodide vacancies | ca_CA |
dc.subject | hot-injection | ca_CA |
dc.subject | anion-exchange | ca_CA |
dc.subject | superoxide ions | ca_CA |
dc.subject | photocatalytic activity | ca_CA |
dc.subject | degradation pathways | ca_CA |
dc.title | Unravelling the Photocatalytic Behavior of All-Inorganic Mixed Halide Perovskites: The Role of Surface Chemical States | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | https://doi.org/10.1021/acsami.9b19374 | |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca_CA |
dc.relation.publisherVersion | https://pubs.acs.org/doi/abs/10.1021/acsami.9b19374 | ca_CA |
dc.contributor.funder | This work was supported by Universidad de Pamplona, Internal project 2019 and project GA313-BP-2017. A.F.G.-R. acknowledges COLCIENCIAS for the Ph.D. 617-scholarship. We thank Santiago Mesa from Laboratorio de Celdas Solares–CIDEMAT for his assistance with SPV measurements. The authors gratefully acknowledge the financial support provided by the Colombia Scientific Program within the framework of the call Ecosistema Cientı́fico (Contract No. FP44842- 218-2018). We thank Laboratorio de Rayos X and Laboratorio de Ciencia de Superficies (SurfLab–UIS) from Universidad Industrial de Santander for the XRD measurements and providing their facilities to perform the XPS measurements, respectively. This work was also partially supported by European Research Council (ERC) via Consolidator Grant (724424–No-LIMIT), EU (FEDER) under Project TEC2017-85912-C2-2, the Spanish Ministerio de Ciencia, Innovación y Universidades through the Project ENE2017-85087-C3-1-R, and Generalitat Valenciana via Prometeo Grant Q-Devices (Prometeo/2018/098). We acknowledge the SCSIE from the University of Valencia for providing TEM facilities. | ca_CA |
dc.type.version | info:eu-repo/semantics/submittedVersion | ca_CA |
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