title: Photocatalytic Carbon Dioxide Reduction at p-Type Copper(I) Iodide.
abstract: A p-type semiconductor, CuI, has been synthesized, characterized, and tested as a photocatalyst for CO2reduction under UV/Vis irradiation in presence of isopropanol as a hole scavenger. Formation of CO, CH4, and/or HCOOH was observed. The photocatalytic activity of CuI was attributed to the very low potential of the conduction band edge (i.e., -2.28 V vs. NHE). Photocurrents generated by the studied material confirm a high efficiency of the photoinduced interfacial electrontransfer processes. Our studies show that p-type semiconductors may be effective photocatalysts for CO2reduction, even better than extensively studied n-type titanium dioxide, owing to the low potential of the conduction band edge.
authors.affiliation: Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060, Kraków, Poland.|Department of Chemistry, University of Bari, Orabona, 4, 70125, Bari, Italy.
authors.forename: Tomasz
authors.initials: T
authors.lastname: Baran
authors.affiliation: Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060, Kraków, Poland.
authors.forename: Szymon
authors.initials: S
authors.lastname: Wojtyła
authors.affiliation: Department of Chemistry, University of Bari, Orabona, 4, 70125, Bari, Italy.|CIRCC, Via Celso Ulpiani, 27, 70126, Bari, Italy.
authors.forename: Angela
authors.initials: A
authors.lastname: Dibenedetto
authors.affiliation: CIRCC, Via Celso Ulpiani, 27, 70126, Bari, Italy.|IC2R srl, Technopolis, via Casamassima km 3, Valenzano, Bari, 70100, Italy.
authors.forename: Michele
authors.initials: M
authors.lastname: Aresta
authors.affiliation: Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060, Kraków, Poland. macyk@chemia.uj.edu.pl.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Macyk
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D007454:Iodides / Q000737:chemistry*; D010084:Oxidation-Reduction; D055668:Photochemical Processes; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction
chemical_list: D007454:Iodides; D002245:Carbon Dioxide; D003300:Copper; C073870:cuprous iodide
keywords: carbon dioxide reduction; copper(I) iodide; electron transfer; p-type semiconductors; photocatalysis