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Photo, thermal and photothermal activity of ▫$TiO_2$▫ supported Pt catalysts for plasmon-driven environmental applications
Gregor Žerjav, Zafer Say, Janez Zavašnik, Matjaž Finšgar, Christoph Langhammer, Albin Pintar, 2023, izvirni znanstveni članek

Povzetek: TiO2+Pt plasmonic solids with 1 wt% Pt and different TiO2 supports (anatase nanoparticles (TNP), polycrystalline nanorods (a-TNR) and single-crystal anatase nanorods (TNR)) were synthesized using the wet impregnation technique and tested as photo, thermal and photothermal catalysts in gas-solid and gas-liquid-solid reactions. Due to the different charges of the TiO2 support surfaces, Pt particles with different sizes, crystallinities and degrees of interaction with the TiO2 supports were formed during the synthesis. The heights of the Schottky barrier (SBH) were 0.38 eV for the a-TNR+Pt, 0.41 eV for the TNP+Pt, and 0.50 eV for the TNR+Pt samples, respectively. The low visible-light-triggered photocatalytic activity of the TNR+Pt catalyst toward the oxidation of water-dissolved bisphenol A (BPA) is attributed to its high SBH and active site deactivation due to the adsorption of BPA and/or BPA oxidation products. The highest photothermal catalytic H2-assisted NO2 reduction rate was expressed by the TNR+Pt catalyst. This can be ascribed to the presence of a narrow particle size distribution of small Pt particles, the absence of the Pt catalysed reduction of the TNR support at higher temperatures, and the lower rate of re-injection of “hot electrons” from the TNR support to the Pt particles.
Ključne besede: heterogeneous photocatalysis, titanium dioxide, plasmonic noble metal, platinum particles, visible light illumination, Schottky barrier height, bisphenol A, wastewater treatment, NOx abatement, air cleaning, microreactor, thermal catalysis, photothermal catalysis
Objavljeno v DiRROS: 23.06.2023; Ogledov: 115; Prenosov: 49
.pdf Celotno besedilo (2,98 MB)
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Recovery of rare earth elements from wastewater towards a circular economy
Óscar Barros, Lara Costa, Filomena Costa, Ana Lago, Verónica Rocha, Živa Vipotnik, Bruna Silva, Teresa Tavares, 2019, izvirni znanstveni članek

Objavljeno v DiRROS: 20.06.2023; Ogledov: 149; Prenosov: 43
.pdf Celotno besedilo (4,22 MB)
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Reengineering the old wingmen: Increasing ▫$K^+$▫ coverage to boost electrocatalytic ▫$CO_2RR$▫ on Cu
Matej Huš, Blaž Likozar, 2023, kratki znanstveni prispevek

Objavljeno v DiRROS: 09.06.2023; Ogledov: 133; Prenosov: 15
.pdf Celotno besedilo (1,35 MB)
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Engineered combinatorial cell device for wound healing and bone regeneration
Lucija Kadunc, Duško Lainšček, Rok Gašperšič, Petra Sušjan, Uroš Kovačič, Miha Butinar, Boris Turk, Roman Jerala, Iva Hafner Bratkovič, 2023, izvirni znanstveni članek

Povzetek: Growth factors are the key regulators that promote tissue regeneration and healing processes. While the effects of individual growth factors are well documented, a combination of multiple secreted growth factors underlies stem cell–mediated regeneration. To avoid the potential dangers and laborintensive individual approach of stem cell therapy while maintaining their regeneration-promoting effects based on multiple secreted growth factors, we engineered a “mix-and-match” combinatorial platform based on a library of cell lines producing growth factors. Treatment with a combination of growth factors secreted by engineered mammalian cells was more efficient than with individual growth factors or even stem cell–conditioned medium in a gap closure assay. Furthermore, we implemented in a mouse model a device for allogenic cell therapy for an in situ production of growth factors, where it improved cutaneous wound healing. Augmented bone regeneration was achieved on calvarial bone defects in rats treated with a cell device secreting IGF, FGF, PDGF, TGF-β, and VEGF. In both in vivo models, the systemic concentration of secreted factors was negligible, demonstrating the local effect of the regeneration device. Finally, we introduced a genetic switch that enables temporal control over combinations of trophic factors released at different stages of regeneration mimicking the maturation of natural wound healing to improve therapy and prevent scar formation.
Ključne besede: wound healing, bone regeneration, growth factors
Objavljeno v DiRROS: 01.06.2023; Ogledov: 165; Prenosov: 56
.pdf Celotno besedilo (2,59 MB)
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Hydrothermal leaching of amylose from native, oxidized and heat-treated starches
Mykola V. Nikolenko, Viktoriia D. Myrhorodska-Terentieva, Yuriy Sakhno, Deb P. Jaisi, Blaž Likozar, Andrii Kostyniuk, 2023, izvirni znanstveni članek

Objavljeno v DiRROS: 31.05.2023; Ogledov: 102; Prenosov: 45
.pdf Celotno besedilo (3,83 MB)
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Green synthesis approaches toward preparation of ZIF-76 and its thermal behavior
Marija Švegovec, Aljaž Škrjanc, Andraž Krajnc, Nataša Zabukovec Logar, 2023, izvirni znanstveni članek

Objavljeno v DiRROS: 26.05.2023; Ogledov: 122; Prenosov: 58
.pdf Celotno besedilo (1,08 MB)
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Coiled coils as versatile modules for mammalian cell regulation
Estera Merljak, Anja Golob Urbanc, Tjaša Plaper, Roman Jerala, 2023, pregledni znanstveni članek

Objavljeno v DiRROS: 26.05.2023; Ogledov: 137; Prenosov: 45
.pdf Celotno besedilo (1,19 MB)
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