Ιδρυματικό Αποθετήριο [SANDBOX]
Πολυτεχνείο Κρήτης
EN  |  EL

Αναζήτηση

Πλοήγηση

Ο Χώρος μου

Aldol condensation products during photocatalytic oxidation of ethanol in a photoelectrochemical cell

Panagiotopoulou Paraskevi, Maria Antoniadou, Dimitris I. Kondarides, Panagiotis Lianos

Απλή Εγγραφή


URIhttp://purl.tuc.gr/dl/dias/29FB1F66-4CCB-475A-9BDF-67A629397FB7-
Αναγνωριστικόhttps://doi.org/10.1016/j.apcatb.2010.07.021-
Γλώσσαen-
ΜέγεθοςPages 124–132en
ΤίτλοςAldol condensation products during photocatalytic oxidation of ethanol in a photoelectrochemical cellen
ΔημιουργόςPanagiotopoulou Paraskevien
ΔημιουργόςΠαναγιωτοπουλου Παρασκευηel
ΔημιουργόςMaria Antoniadouen
ΔημιουργόςDimitris I. Kondaridesen
ΔημιουργόςPanagiotis Lianosen
ΕκδότηςElsevieren
ΠερίληψηElectric current was produced in a photoelectrochemical cell during photocatalytic oxidation of ethanol, which was used as a representative organic compound present in wastewater from biomass processing industries. Thus, the cell behaved as a PhotoFuelCell that consumed waste material to produce electricity. The cell consisted of two compartments separated by a silica frit. The anode electrode was a Fluorine-doped Tin Oxide transparent electrode bearing nanocrystalline titania Degussa P25, applied as a paste and calcined at 550 °C. The cathode electrode was a carbon-cloth bearing Pt/Carbon-Black catalyst. The electrolyte was 1.0 M NaOH. When 20%v. ethanol was added in the anode compartment, the cell gave 0.75 mA/cm2 short-circuit current density (calculated over 12 cm2 electrode area) and 1.1 V open-circuit voltage. The anode compartment of the cell was operated under three different conditions: (1) under continuous air flow, i.e. oxygen-rich conditions; (2) under Ar flow, i.e. anaerobic conditions; and (3) exposed to ambient air but without any gas flow through the cell, i.e. oxygen-deficient, mass transfer-limited conditions. In the latter two cases, the oxidation of ethanol and its photo-oxidation products was incomplete and resulted in aldol condensation reactions that produced various aldehydes, some of them of high molecular weight and insoluble. It was concluded that in order to avoid such reactions, which impede mineralization process, measures should be taken for continuous oxygen supply and for optimal combination of the quantity of the photocatalyst and the concentration of the photodegradable substance. Thus only 1%v. ethanol can give 75% of the maximum current obtained in the presence of large ethanol concentration.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2015-10-23-
Ημερομηνία Δημοσίευσης2010-
Βιβλιογραφική ΑναφοράP. Panagiotopoulou, M. Antoniadou, D.I. Kondarides, P. Lianos, “Aldol condensation products during photocatalytic oxidation of ethanol in a photoelectrochemical cell”, Applied Catalysis B: Environmental, Vol. 100, no.1-2, pp. 124-132, Oct. 2010 .doi:10.1016/j.apcatb.2010.07.021.en

Υπηρεσίες

Στατιστικά