Repository of University of Nova Gorica

Search the repository
A+ | A- | Help | SLO | ENG

Query: search in
search in
search in
search in
* old and bolonia study programme


1 - 3 / 3
First pagePrevious page1Next pageLast page
Covalent Organic Polymers and Frameworks for Fluorescence-Based Sensors
Matjaž Valant, Dinesh Shetty, Tina Škorjanc, 2021, review article

Found in: ključnih besedah
Summary of found: ...covalent organic polymers, covalent organic frameworks, quenching, ions, explosives...
Keywords: fluorescence, sensors, covalent organic polymers, covalent organic frameworks, quenching, ions, explosives
Published: 05.05.2021; Views: 1350; Downloads: 165
URL Fulltext (0,00 KB)
This document has many files! More...

Plastic Waste Precursor-Derived Fluorescent Carbon and Construction of Ternary FCs@CuO@TiO2 Hybrid Photocatalyst for Hydrogen Production and Sensing Application
Ming Fang, Matjaž Valant, Sandra Gardonio, Akansha Metha, Rayees Ahmad Rather, Blaž Belec, 2022, original scientific article

Abstract: 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.
Found in: ključnih besedah
Summary of found: ...were used for the detection of metal ions (reference as Cu2+ ions) in water. The...
Keywords: plastic waste, fluorescent carbo, sensing of metal ions, photocatalytic hydrogen production
Published: 25.02.2022; Views: 726; Downloads: 29
.pdf Fulltext (5,98 MB)

The role of hydroxyl ions in the evolution of optical nonlinearity of CuO
Riya Sebastian, Mohanachandran Nair Sindhu Swapna, H. V. Saritha Devi, Vimal Raj, Misha Hari, Sankaranarayana Iyer Sankararaman, 2019, original scientific article

Found in: ključnih besedah
Keywords: hydroxyl ions, optical nonlinearity, Z scan, copper oxide
Published: 05.07.2022; Views: 372; Downloads: 33
.pdf Fulltext (1,61 MB)
This document has many files! More...

Search done in 0 sec.
Back to top