Davide Barreca (Author), Giorgio Carraro (Author), Alberto Gasparotto (Author), Chiara Maccato (Author), Cinzia Sada (Author), Elza Bontempi (Author), Mariangela Brisotto (Author), Olena Pliekhova (Author), Urška Lavrenčič Štangar (Author)

Abstract

Supported Fe2O3/WO3 nanocomposites were fabricated by an original vapor phase approach, involving the chemical vapor deposition (CVD) of Fe2O3 on Ti sheets and the subsequent radio frequency (RF)-sputtering of WO3. Particular attention was dedicated to the control of the W/Fe ratio, in order to tailor the composition of the resulting materials. The target systems were analyzed by the joint use of complementary techniques, that is, X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), energy dispersive X-ray spectroscopy (EDXS), X-ray photoelectron spectroscopy (XPS), secondary ion mass spectrometry (SIMS), and optical absorption spectroscopy. The results showed the uniform decoration of α-Fe2O3 (hematite) globular particles by tiny WO3 aggregates, whose content could be controlled by modulations of the sole sputtering time. The photocatalytic degradation of phenol in the liquid phase was selected as a test reaction for a preliminary investigation of the system behavior in wastewater treatment applications. The system activity under both UVand Vis light illumination may open doors for further material optimization in view of real-world end-uses.

Keywords

Fe2O3;WO3;nanocomposites;chemical vapor deposition;sputtering;photocatalysis;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UNG - University of Nova Gorica
UDC: 543.2/.9
COBISS: 4461563 Link will open in a new window
ISSN: 0944-1344
Views: 4248
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Other data

URN: URN:SI:UNG
Type (COBISS): Not categorized
Pages: str. 20350-20359
Volume: ǂVol. ǂ23
Issue: ǂiss. ǂ20
Chronology: 2016
DOI: 10.1007/s11356-016-7226-8
ID: 9160334