1. Novel two-step vapor-phase synthesis of UV – Vis light active Fe2O3/WO3 nanocomposites for phenol degradationUrška Lavrenčič Štangar, Olena Pliekhova, Mariangela Brisotto, Elza Bontempi, Cinzia Sada, Chiara Maccato, Alberto Gasparotto, Giorgio Carraro, Davide Barreca, 2016, original scientific article 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. Found in: ključnih besedah Summary of found: ...on Ti sheets
and the subsequent radio frequency (RF)- sputtering of WO3.
Particular attention was dedicated to the... Keywords: Fe2O3, WO3, Nanocomposites, Chemical vapor deposition, Sputtering, Photocatalysis Published: 03.08.2016; Views: 3779; Downloads: 0
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2. Hematite-based nanocomposites for light-activated applications: Synergistic role of TiO2 and Au introductionGiorgio Carraro, Chiara Maccato, Alberto Gasparotto, Michael E.A Warwick, Cinzia Sada, Stuart Turner, Antonio Bazzo, Teresa Andreu, Olena Pliekhova, Dorota Korte, Urška Lavrenčič Štangar, Gustaaf Van Tendeloo, Joan Ramón Morante, Davide Barreca, 2017, original scientific article Found in: ključnih besedah Summary of found: ...Fe2O3-TiO2-Au, Plasma enhanced-chemical vapor deposition, Sputtering, Photocatalysis... Keywords: Fe2O3-TiO2-Au, Plasma enhanced-chemical vapor deposition, Sputtering, Photocatalysis Published: 10.10.2016; Views: 3888; Downloads: 0
Fulltext (1,16 MB) |
3. RF sputtered boron carbide thin film for UVB and UVC shielding: A greener approachSWAPNA MOHANACHANDRAN NAIR SINDHU, 2022, original scientific article Abstract: The paper reports the development of RF sputtered boron carbide coatings as refractory and UV-shielder for high-temperature goggles and spacecraft applications. The advancement in the design and fabrication of machinery and UV
optics necessitates the development of low-cost, eco-friendly preparation of
wear-resistant refractory coatings with strong absorption in the UV region.
Boron carbide coatings have proven their potential as abrasives besides their
electronic applications. In the present work, boron carbide coatings are prepared
by RF sputtering technique using the target prepared by low-temperature
hydrothermal synthesis using cotton as carbon precursor. The sample synthesized and the film prepared are subjected to structure, morphological, and
optical characterizations. The X-ray diffraction, Fourier transform infrared,
micro-Raman and X-ray photoelectron studies confirm the formation of boronrich boron carbide with the thermal stability of 87% at 800 C, revealed through
the thermogravimetric analysis. The Tauc plot analysis gives the bandgap
energy of the boron carbide target and film as 2.66 eV and 2.70 eV, respectively.
The UV–Vis spectroscopic study also reveals the potential of the sample and the
film in blocking UVB and UVC. The CIE plot from the photoluminescence study
suggests the sample to be a blue light emitter. Found in: ključnih besedah Summary of found: ...work, boron carbide coatings are prepared
by RF sputtering technique using the target prepared by low-temperature
hydrothermal... Keywords: Boron carbide, RF sputtering, uv shielding, thin films Published: 30.06.2022; Views: 88; Downloads: 0
Fulltext (1,78 MB) |