title: Photoreduction of carbon dioxide to formic acid in aqueous suspension: a comparison between phthalocyanine/TiO2 and porphyrin/TiO2 catalysed processes.
abstract: Composite materials prepared by loading polycrystalline TiO2 powders with lipophilic highly branched Cu(II)- and metal-free phthalocyanines or porphyrins, which have been used in the past as photocatalysts for photodegradative processes, have been successfully tested for the efficient photoreduction of carbon dioxide in aqueous suspension affording significant amounts of formic acid. The results indicated that the presence of the sensitizers is beneficial for the photoactivity, confirming the important role of Cu(II) co-ordinated in the middle of the macrocycles. A comparison between Cu(II) phthalocyanines and Cu(II) porphyrins indicated that the Cu(II)- phthalocyanine sensitizer was more efficient in the photoreduction of CO2 to formic acid, probably due to its favorable reduction potential.
authors.affiliation: Department of Engineering for Innovation, University of Salento, via Arnesano, Lecce 73100, Italy. Giuseppe.mele@unisalento.it.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Mele
authors.affiliation: CNR-ICCOM UOS of Bari, Chemistry Department, University of Bari, Via Orabona, 4, Bari 70126, Italy. cosimo.annese@uniba.it.
authors.forename: Cosimo
authors.initials: C
authors.lastname: Annese
authors.affiliation: Chemistry Department, University of Bari "A. Moro", via Orabona, 4, Bari 70126, Italy. lucia.daccolti@uniba.it.
authors.forename: Lucia
authors.initials: L
authors.lastname: D'Accolti
authors.affiliation: Department of Engineering for Innovation, University of Salento, via Arnesano, Lecce 73100, Italy. alberto.dericcardis@unisalento.it.
authors.forename: Alberto
authors.initials: A
authors.lastname: De Riccardis
authors.affiliation: CNR-ICCOM UOS of Bari, Chemistry Department, University of Bari, Via Orabona, 4, Bari 70126, Italy. fusco@ba.iccom.cnr.it.
authors.forename: Caterina
authors.initials: C
authors.lastname: Fusco
authors.affiliation: Dipartimento di Energia, Ingegneria dell'Informazione e Modelli Matematici, DEIM, Università di Palermo, Viale delle Scienze, Ed. 6, Palermo 90128, Italy. leonardo.palmisano@unipa.it.
authors.forename: Leonardo
authors.initials: L
authors.lastname: Palmisano
authors.affiliation: Department of Engineering for Innovation, University of Salento, via Arnesano, Lecce 73100, Italy. anna.scarlino@unisalento.it.
authors.forename: Anna
authors.initials: A
authors.lastname: Scarlino
authors.affiliation: Department of Engineering for Innovation, University of Salento, via Arnesano, Lecce 73100, Italy. giuseppe.vasapollo@unisalento.it.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Vasapollo
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D002384:Catalysis; D005561:Formates / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D006863:Hydrogen-Ion Concentration; D007211:Indoles / Q000737:chemistry*; D054833:Isoindoles; D010084:Oxidation-Reduction; D055668:Photochemical Processes; D011166:Porphyrins / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D014025:Titanium / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D005561:Formates; D007211:Indoles; D054833:Isoindoles; D011166:Porphyrins; D014867:Water; C030544:formic acid; D002245:Carbon Dioxide; C009495:titanium dioxide; D014025:Titanium; C013647:phthalocyanine