31. Defective ▫$TiO_2$▫ nanotube arrays for efficient photoelectrochemical degradation of organic pollutantsManel Machreki, Takwa Chouki, Georgi Tyuliev, Dušan Žigon, Bunsho Ohtani, Alexandre Loukanov, Plamen Stefanov, Saim Emin, 2023, izvirni znanstveni članek Opis: Oxygen vacancies (OVs) are one of the most critical factors that enhance the electrical and catalytic characteristics of metal oxide-based photo-electrodes. In this work, a simple procedure was applied to prepare reduced TiO 2 nanotube arrays (NTAs) (TiO 2−x) via a one-step reduction method using NaBH 4. A series of characterization techniques were used to study the structural, optical, and electronic properties of TiO 2−x NTAs. X-ray photoelectron spectroscopy confirmed the presence of defects in TiO 2−x NTAs. Photoacoustic measurements were used to estimate the electron-trap density in the NTAs. Photoelectrochemical studies show that the photocurrent density of TiO 2−x NTAs was nearly 3 times higher than that of pristine TiO 2. It was found that increasing OVs in TiO 2 affects the surface recombination centers, enhances electrical conductivity, and improves charge transport. For the first time, a TiO 2−x photoanode was used in the photo-electrochemical (PEC) degradation of a textile dye (basic blue 41, B41) and ibuprofen (IBF) pharmaceutical using in situ generated reactive chlorine species (RCS). Liquid chromatography coupled with mass spectrometry was used to study the mechanisms for the degradation of B41 and IBF. Phytotoxicity tests of B41 and IBF solutions were performed using Lepidium sativum L. to evaluate the potential acute toxicity before and after the PEC treatment. The present work provides efficient PEC degradation of the B41 dye and IBF in the presence of RCS without generating harmful products. Ključne besede: TiO2, nanotube arrays, photoelectrochemical degradation, organic pollutants Objavljeno v RUNG: 12.06.2023; Ogledov: 1106; Prenosov: 7 Celotno besedilo (4,22 MB) Gradivo ima več datotek! Več... |
32. Covalent organic frameworks for fluorescent imaging of hypoxiaTina Škorjanc, Dinesh Shetty, Gregor Mali, Damjan Makuc, Martina Bergant Marušič, Matjaž Valant, 2023, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: hypoxia, covalent organic frameworks, imaging, fluorescence, post-synthetic modification Objavljeno v RUNG: 06.06.2023; Ogledov: 1149; Prenosov: 2 Povezava na datoteko Gradivo ima več datotek! Več... |
33. Nitroreductase-sensitive fluorescent covalent organic framework for tumor hypoxia imaging in cellsTina Škorjanc, Dinesh Shetty, Sushil Kumar, Damjan Makuc, Gregor Mali, Janez Volavšek, Martina Bergant Marušič, Matjaž Valant, 2023, izvirni znanstveni članek Ključne besede: covalent organic frameworks, imaging, hypoxia, fluorescence, cancer cells Objavljeno v RUNG: 17.05.2023; Ogledov: 1171; Prenosov: 10 Celotno besedilo (1,55 MB) Gradivo ima več datotek! Več... |
34. Conjugated polymer mesocrystals with structural and optoelectronic coherence and anisotropy in three dimensionsLiyang Yu, Egon Pavlica, Ruipeng Li, Yufei Zhong, Carlos Silva, Gvido Bratina, Christian Műller, Aram Amassian, Natalie Stingelin, 2022, izvirni znanstveni članek Ključne besede: organic semiconductor, time-of-flight, charge carrier mobility, solid processing, large crystal Objavljeno v RUNG: 28.02.2023; Ogledov: 1042; Prenosov: 82 Povezava na celotno besedilo Gradivo ima več datotek! Več... |
35. Copper bioavailability and leaching in conventional and organic viticulture under environmental stressErika Jež, Elisa Pellegrini, Marco Contin, 2023, izvirni znanstveni članek Opis: The continuous use of Cu-based fungicides in viticulture has caused Cu accumulation in soils, which represents a major environmental and toxicological concern. The purpose of this study was to verify whether the organic management would be more resilient to temperature and moisture stresses in comparison to conventional practices. Two organic and two conventional vineyard soils, contrasting in pH, were exposed for six months to temperature stress (29 °C), moisture stress (10% water holding capacity—WHC), and combined stresses (29 °C—10% WHC). Main soil properties, Cu speciation, bioavailability, and leaching were monitored before and after 6 months’ incubation. Results confirm that the increase of temperature caused a decrease in both total organic carbon (TOC) and dissolved organic carbon (DOC) (up to 19% and 49%, respectively), a decrease in available ammonium, and an increase in nitrate. Moisture stress tends to mitigate some of these changes. Despite that, changes of Cu bioavailability and leaching were limited and rarely significant. Moreover, no regular trends between conventional and organic management could be observed. Changes in soil pH and total N (TN) appeared as the most influencing properties to regulate Cu behavior in vineyard soils. Calcareous soils were more resistant to environmental stresses compared to acid soils, regardless of the type of management (conventional or organic). Ključne besede: soil copper, climate changes, soil organic matter, organic viticulture, BCR speciation Objavljeno v RUNG: 22.02.2023; Ogledov: 1220; Prenosov: 20 Celotno besedilo (2,57 MB) Gradivo ima več datotek! Več... |
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37. Salicylaldehydate coordinated two-dimensional-conjugated metal-organic frameworksAbdul Khayum Mohammed, Pilar Pena-Sánchez, Ajmal Pandikassala, Safa Gaber, Ayesha Alkhoori, Tina Škorjanc, Kyriaki Polychronopoulou, Sreekumar Kurungot, Felipe Gándara, Dinesh Shetty, 2023, izvirni znanstveni članek Ključne besede: metal-organic framework, 2D materials, salicylaldehyde, thin films, mechanochemistry Objavljeno v RUNG: 10.02.2023; Ogledov: 1206; Prenosov: 1 Povezava na datoteko Gradivo ima več datotek! Več... |
38. Influence of P3HT:PCBM ratio on thermal and transport properties of bulk heterojunction solar cellsDorota Korte, Egon Pavlica, Domen Klančar, Gvido Bratina, Michal Pawlak, Ewa Gondek, Peng Song, Junyan Liu, B. Derkowska-Zielińska, 2023, izvirni znanstveni članek Ključne besede: organic bulk-heterojunction solar cells, polymer-fullerene solar cells, photothermal beam deflection spectrometry, non-radiative recombination, thermal diffusivity, frequency domain methods Objavljeno v RUNG: 09.01.2023; Ogledov: 1535; Prenosov: 19 Celotno besedilo (2,58 MB) Gradivo ima več datotek! Več... |
39. Van der Waals heterostructuresVadym Tkachuk, doktorska disertacija Ključne besede: Graphene, hexagonal boron nitride, PDI8-CN2, organic semiconductor, heterostructure, charge transport, electronic properties, 2D crystal, 2D crystal transfer, tunneling. Objavljeno v RUNG: 24.10.2022; Ogledov: 1483; Prenosov: 52 Celotno besedilo (38,13 MB) |
40. Hydrophobicity Tuning in Isostructural Urchin-Shaped Covalent Organic Framework Nanoparticles by Pore Surface Engineering for Oil–Water SeparationGobinda Das, Tina Skorjanc, Thirumurugan Prakasam, Bikash Garai, Salma Abubakar, Christina Zalch Saad, Felipe Gandara, Renu Pasricha, Sudhir Kumar Sharma, Sabu Varghese, Ramesh Jagannathan, Mark A. Olson, Ali Trabolsi, 2022, izvirni znanstveni članek Ključne besede: Adsorption, Covalent organic frameworks, Hydrophobicity, Lipids, Materials Objavljeno v RUNG: 26.09.2022; Ogledov: 1318; Prenosov: 0 Gradivo ima več datotek! Več... |