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Title:Plastic Waste Precursor-Derived Fluorescent Carbon and Construction of Ternary FCs@CuO@TiO2 Hybrid Photocatalyst for Hydrogen Production and Sensing Application
Authors:ID Metha, Akansha, FunGlass, A. Dubček University of Trenčín, Študentská 2, 911 50 Trenčín, Slovakia (Author)
ID Rather, Rayees Ahmad, College of Material Science and Engineering, Shenzhen University, Shenzhen 518060, China 3 College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China (Author)
ID Belec, Blaž, Materials Research Laboratory, University of Nova Gorica, Vipavska 11c, 5270 Ajdovscina, Slovenia (Author)
ID Gardonio, Sandra, Materials Research Laboratory, University of Nova Gorica, Vipavska 11c, 5270 Ajdovscina, Slovenia (Author)
ID Fang, Ming, College of Material Science and Engineering, Shenzhen University, Shenzhen 518060, China (Author)
ID Valant, Matjaž, Materials Research Laboratory, University of Nova Gorica, Vipavska 11c, 5270 Ajdovscina, Slovenia (Author)
Files:.pdf energies-15-01734.pdf (5,98 MB)
MD5: 3DF6A138781D72ED228C886FCB1CDA6A
 
Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
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.
Keywords:plastic waste, fluorescent carbo, sensing of metal ions, photocatalytic hydrogen production
Year of publishing:2022
Number of pages:1-16
Numbering:15, 5
PID:20.500.12556/RUNG-7203 New window
COBISS.SI-ID:98942723 New window
DOI:https://doi.org/10.3390/en15051734 New window
NUK URN:URN:SI:UNG:REP:KO8P6RIK
Publication date in RUNG:25.02.2022
Views:2416
Downloads:48
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Record is a part of a journal

Title:Energies
ISSN:1996-1073
COBISS.SI-ID:518046745 New window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:25.02.2022

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