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Composites of transition metal dichalcogenides and topological insulators as a new class of catalytic materials
Jelena Rmuš, Blaž Belec, Igor Milanović, Mattia Fanetti, Sandra Gardonio, Matjaž Valant, Sandra V. Kurko, 2022, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: composites, topological insulators
Objavljeno v RUNG: 13.02.2023; Ogledov: 1097; Prenosov: 0
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Unravelling the electronic properties of Bi2Se3-Bi2S3 quasi binary system
Matjaž Valant, Sandra Gardonio, Rini Benher Zipporah, Mattia Fanetti, 2022, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: topološki izolatorji, selenidi, elektronske lastnosti
Objavljeno v RUNG: 30.11.2022; Ogledov: 1291; Prenosov: 0
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Explotation of Localized Surface Plasmon Resonance for Detection of nanoparticle's topological surface states
Blaž Belec, Mattia Fanetti, Sandra Gardonio, Matjaž Valant, 2022, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: topological insulator, bismuth selenide
Objavljeno v RUNG: 27.09.2022; Ogledov: 1314; Prenosov: 0
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Topological insulator nanoparticles : material with prospect for photo-thermal applications
Blaž Belec, Nina Kostevšek, Giulia Della Pelle, Sandra Gardonio, Mattia Fanetti, Matija Valant, 2022, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: topological insulators, nanomaterials, photo-thermal
Objavljeno v RUNG: 27.06.2022; Ogledov: 1276; Prenosov: 6
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Plastic Waste Precursor-Derived Fluorescent Carbon and Construction of Ternary FCs@CuO@TiO2 Hybrid Photocatalyst for Hydrogen Production and Sensing Application
Akansha Metha, Rayees Ahmad Rather, Blaž Belec, Sandra Gardonio, Ming Fang, Matjaž Valant, 2022, izvirni znanstveni članek

Opis: A sustainable nexus between renewable energy production and plastic abatement is imperative for overall sustainable development. In this regard, this study aims to develop a cheaper and environmentally friendly nexus between plastic waste management, wastewater treatment, and renewable hydrogen production. Fluorescent carbon (FCs) were synthesized from commonly used LDPE (low-density polyethylene) by a facile hydrothermal approach. Optical absorption study revealed an absorption edge around 300 nm and two emission bands at 430 and 470 nm. The morphological analysis showed two different patterns of FCs, a thin sheet with 2D morphology and elongated particles. The sheet-shaped particles are 0.5 μm in size, while as for elongated structures, the size varies from 0.5 to 1 μm. The as-synthesized FCs were used for the detection of metal ions (reference as Cu2+ ions) in water. The fluorescence intensity of FCs versus Cu2+ ions depicts its upright analytical ability with a limit of detection (LOD) reaching 86.5 nM, which is considerably lesser than earlier reported fluorescence probes derived from waste. After the sensing of Cu2+, the as-obtained FCs@Cu2+ was mixed with TiO2 to form a ternary FCs@CuO@TiO2 composite. This ternary composite was utilized for photocatalytic hydrogen production from water under 1.5 AM solar light irradiation. The H2 evolution rate was found to be ~1800 μmolg−1, which is many folds compared to the bare FCs. Moreover, the optimized FCs@CuO@TiO2 ternary composite showed a photocurrent density of ~2.40 mA/cm2 at 1 V vs. Ag/AgCl, in 1 M Na2SO4 solution under the illumination of simulated solar light. The achieved photocurrent density corresponds to the solar-to-hydrogen (STH) efficiency of ~0.95%. The efficiency is due to the fluorescence nature of FCs and the synergistic effect of CuO embedded in TiO2, which enhances the optical absorption of the composite by reaching the bandgap of 2.44 eV, apparently reducing the recombination rate, which was confirmed by optoelectronic, structural, and spectroscopic characterizations.
Ključne besede: plastic waste, fluorescent carbo, sensing of metal ions, photocatalytic hydrogen production
Objavljeno v RUNG: 25.02.2022; Ogledov: 1731; Prenosov: 43
.pdf Celotno besedilo (5,98 MB)

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