Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) LaFeO3 and BiFeO3 perovskites as nanocatalysts for contaminant degradation in heterogeneous Fenton-like reactions
Autor Rusevova, K.; Köferstein, R.; Rosell, M.; Richnow, H.H.; Kopinke, F.-D.; Georgi, A.;
Journal / Serie Chemical Engineering Journal
Erscheinungsjahr 2014
Department ISOBIO; TUCHEM;
Band/Volume 239
Sprache englisch;
POF III (gesamt) T41;
Keywords Heterogeneous Fenton; Perovskite; LaFeO3; BiFeO3; Catalytic oxidation
UFZ Querschnittsthemen RU3;
Abstract The present study examines the applicability of two iron-containing perovskites, LaFeO3 (LFO) and BiFeO3 (BFO), as nanocatalysts for heterogeneous Fenton-like reactions using phenol and methyl tert-butyl ether (MTBE) as model contaminants. LFO and BFO synthesized according to a sol–gel method using citric acid as complexing agent have a crystallite size of about 60–70 nm with specific surface areas of 5.2 m2 g−1 for LFO and 3.2 m2 g−1 for BFO. In heterogeneous Fenton-like reactions, LFO and BFO showed similar pseudo-first order rate constants for phenol oxidation ([…] and […]) at pH = 7 when 0.1 g L−1 catalyst and 3.0 g L−1 H2O2 were applied. Degradation efficiency was improved for both perovskites by a factor of approximately three when the pH value was slightly decreased to pH = 5. An increase of the reaction temperature from 20 °C to 60 °C during the BFO-catalyzed reaction led to a significant acceleration of phenol removal of about one order of magnitude […]. High stability and reusability of the BFO particles was confirmed in four successive oxidation batches using MTBE as model contaminant. In addition, the mechanism of the perovskite-catalyzed Fenton-like system was studied by applying compound-specific stable isotope analysis (CSIA). The perovskite-catalyzed oxidation appears to follow a pathway similar to that of the homogeneous Fenton reaction, i.e. *OH radicals play a dominant role as primary reactive species.
ID 14432
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=14432
Rusevova, K., Köferstein, R., Rosell, M., Richnow, H.H., Kopinke, F.-D., Georgi, A. (2014):
LaFeO3 and BiFeO3 perovskites as nanocatalysts for contaminant degradation in heterogeneous Fenton-like reactions
Chem. Eng. J. 239 , 322 - 331