Universität zu Köln

Queralto, Albert ORCID: 0000-0001-9101-0033, Gyorgy, Eniko, Ivan, Raluca, Perez del Pino, Angel, Frohnhoven, Robert and Mathur, Sanjay ORCID: 0000-0003-2765-2693 (2020). Enhanced UV-Vis Photodegradation of Nanocomposite Reduced Graphene Oxide/Ferrite Nanofiber Films Prepared by Laser-Assisted Evaporation. Crystals, 10 (4). BASEL: MDPI. ISSN 2073-4352

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Abstract

Nanocomposite films of rGO/MFeO3 (M = Bi, La) nanofibers were grown by matrix-assisted pulsed laser evaporation of frozen target dispersions containing GO platelets and MFeO3 nanofibers. Electron microscopy investigations confirmed the successful fabrication of MFeO3 nanofibers by electrospinning Part of nanofibers were broken into shorter units, and spherical nanoparticles were formed during laser processing. Numerical simulations were performed in order to estimate the maximum temperature values reached by the nanofibers during laser irradiation. X-ray diffraction analyses revealed the formation of perovskite MFeO3 phase, whereas secondary phases of BiFeO3 could not be completely avoided, due to the high volatility of bismuth. XPS measurements disclosed the presence of metallic bismuth and Fe2+ for BiFeO3, whereas La-2(CO3)(3) and Fe2+ were observed in case of LaFeO3 nanofibers. High photocatalytic efficiencies for the degradation of methyl orange were achieved for nanocomposite films, both under UV and visible light irradiation conditions. Degradation values of up to 70% after 400 min irradiation were obtained for rGO/LaFeO3 nanocomposite thin layers, with weights below 10 mu g, rGO platelets acting as reservoirs for photoelectrons generated at the surface of MFeO3.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Queralto, Albert UNSPECIFIED orcid.org/0000-0001-9101-0033 UNSPECIFIED Gyorgy, Eniko UNSPECIFIED UNSPECIFIED UNSPECIFIED Ivan, Raluca UNSPECIFIED UNSPECIFIED UNSPECIFIED Perez del Pino, Angel UNSPECIFIED UNSPECIFIED UNSPECIFIED Frohnhoven, Robert UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED orcid.org/0000-0003-2765-2693 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-338271
DOI:	10.3390/cryst10040271
Journal or Publication Title:	Crystals
Volume:	10
Number:	4
Date:	2020
Publisher:	MDPI
Place of Publication:	BASEL
ISSN:	2073-4352
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language METHYL-ORANGE; THIN-FILMS; XPS MEASUREMENTS; OXYGEN VACANCY; OXIDE-FILMS; BIFEO3; COMPOSITES; REDUCTION; KINETICS; NANOPARTICLES Multiple languages Crystallography; Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/33827