1861. Improved photocatalytic activity of SnO[sub]2-TiO[sub]2 nanocomposite thin films prepared by low-temperature sol-gel methodKsenija Maver, Iztok Arčon, Mattia Fanetti, Samar Al Jitan, Giovanni Palmisano, Matjaž Valant, Urška Lavrenčič Štangar, 2021, izvirni znanstveni članek Opis: The objective of this research was to investigate how the photocatalytic activity of pure TiO2 can be improved by
SnO2 modification. Different molar ratios of tin to titanium were prepared. The correlation between tin concentration
and structural properties was investigated to explain the mechanism of photocatalytic efficiency and
to optimize the synthesis conditions to obtain enhanced activity of the SnO2-modified TiO2 photocatalysts under
UV-irradiation. The SnO2-modified TiO2 photocatalysts were prepared by a low-temperature sol-gel method
based on organic tin and titanium precursors. The precursors underwent sol-gel reactions separately to form
SnO2-TiO2 sol. The sol-gels were deposited on a glass substrate by a dip-coating technique and dried at 150 ◦C to
obtain the photocatalysts in the form of a thin film. To test the thermal stability of the material, an additional set
of photocatalysts was prepared by calcining the dried samples in air at 500 ◦C. The photocatalytic activity of the
samples was determined by measuring the degradation rate of an azo dye. An increase of up to 30% in the
photocatalytic activity of the air-dried samples was obtained when the TiO2 was modified with the SnO2 in a
concentration range of 0.1–1 mol.%. At higher SnO2 loadings, the photocatalytic activity of the photocatalyst
was reduced compared to the unmodified TiO2. The calcined samples showed an overall reduced photocatalytic
activity compared to the air-dried samples. Various characterization techniques (UV-Vis, XRD, N2-physisorption,
TEM, EDX, SEM, XAS and photoelectrochemical characterization) were used to explain the mechanism for the
enhanced and hindered photocatalytic performances of the SnO2-modified TiO2 photocatalysts. The results
showed that the nanocrystalline cassiterite SnO2 is attached to the TiO2 nanocrystallites through the Sn-O-Ti
bonds. In this way, the coupling of two semiconductors, SnO2 and TiO2, was demonstrated. Compared to
single-phase photocatalysts, the coupling of semiconductors has a beneficial effect on the separation of charge
carriers, which prolongs their lifetime for accessibility to participate in the redox reactions. The maximum increase
in activity of the thin films was achieved in the low concentration range (0.1–1 mol.%), which means that
an optimal ratio and contact of the two phases is achieved for the given physical parameters such as particle size,
shape and specific surface area of the catalyst. Ključne besede: photocatalytic activity, Sn-modified TiO2, low-temperature, thin films, XAS analysis Objavljeno v RUNG: 05.07.2021; Ogledov: 2584; Prenosov: 0 Gradivo ima več datotek! Več... |
1862. Vati, Kedumetse (PRC-JTU); Székelyhidi, László (H-LAJO-IM) Exponential monomials on hypergroup joins. (English summary) Miskolc Math. Notes 21 (2020), no. 1, 463-472 : [review]Irina Elena Cristea, 2021, recenzija, prikaz knjige, kritika Ključne besede: spectral analysis, hypergroup join, exponential polynomial Objavljeno v RUNG: 02.07.2021; Ogledov: 2150; Prenosov: 14 Povezava na celotno besedilo Gradivo ima več datotek! Več... |
1863. Minority literature and collective trauma : the case of Slovene Triestine literatureAna Toroš, 2021, izvirni znanstveni članek Opis: The study focuses on the relationship between minority literature and collective trauma.
Drawing on the theory of trauma, psychoanalysis, memory studies, and literary representations
of memory, we argue that the trauma resulting from the suppression of Slovene
identity in Trieste during fascism is transmitted into literary discourse through two
channels. Firstly, through the normative model of remembering the trauma in question –
namely through literary works that can be described as fictions of memory. Secondly, we
paid attention to the manifestations of trauma that (unconsciously) enter the narrative
structure, regardless of the time and events, which are not necessarily tied to the period
of fascism and to concrete events and places of memory. In this context, we illuminated Ključne besede: collective trauma, collective memory, minority literature, Trieste, literary
representations Objavljeno v RUNG: 01.07.2021; Ogledov: 2206; Prenosov: 0 Gradivo ima več datotek! Več... |
1864. Self-assembled nanobodies as selectively targeted, nanostructured, and multivalent materialsLaura Sánchez-García, Eric Voltà-Durán, Eloi Parladé, Elisa Mazzega, Alejandro Sánchez-Chardi, Naroa Serna, Hèctor López-Laguna, Mara Mitstorfer, Ugutz Unzueta, Esther Vázquez, Antonio Villaverde, Ario De Marco, 2021, pregledni znanstveni članek Ključne besede: nanobodies, nanoparticles, fluorescent reagents, protein self-assembling Objavljeno v RUNG: 30.06.2021; Ogledov: 2139; Prenosov: 0 Gradivo ima več datotek! Več... |
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1867. URBiNAT, Heritage and Circular EconomyAcri Marco, Dobričić Saša, prispevek na konferenci brez natisa Opis: The presentation is showing the origin of the concept of the cultural corridor in Rijeka in the CLIC project as originated from the URBiNAT project Ključne besede: Cultural Corridor, Healthy Corridor, Circular Eocnomy, Adaptive Reuse, Cultural Heritage, Historic Urban Landscape, Built Environment, urban regeneraiton, heritage conservation, heritage valorisaiton, Common Goods, Sustainable Heritage Objavljeno v RUNG: 22.06.2021; Ogledov: 2216; Prenosov: 0 Gradivo ima več datotek! Več... |
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