GQD-PAN-based high-performance supercapacitor: an approach towards wealth from waste

Kumar, Dheeraj; Vashishth, Ekta; Rani, Sweety; Kumar, Advitiya; Nandan, Bhanu; Bahga, Supreet Singh; Srivastava, Rajiv K.

doi:10.1039/d4su00153b

Cited by 2 publications

(2 citation statements)

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“…Nonpolar GQDs further showed applications in different domains including security ink 44 and energy storage with high capacitive behavior. 45 Herein, GQDs were synthesised using Styrofoam waste as precursor using hydrothermal pyrolysis. The morphology and size of GQDs was studied through transmission electron microscopy (TEM) and dynamic light spectroscopy (DLS).…”

Section: Introductionmentioning

confidence: 99%

“…The nonpolar GQDs synthesized using microwave pyrolysis exhibited exceptional physicochemical attributes, which ultimately gave superior self-cleaning efficacy and durability for their application as a coating onto cotton fabric. Nonpolar GQDs further showed applications in different domains including security ink and energy storage with high capacitive behavior …”

Section: Introductionmentioning

confidence: 99%

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Hydrothermal Pyrolysis of Styrofoam Waste for Efficient Copper Ion Sensing Using Graphene Quantum Dots

Kumar,

Rani,

Mathew

et al. 2024

ACS Sustainable Resour. Manage.

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The accelerating buildup of plastic waste, especially styrene foam, has become a major environmental problem. Traditional methods of recycling do not help in managing Styrofoam waste efficiently because of economic factors and minimal technological advancements available. Pyrolysis is one of the promising ways to transform styrenofoam wastes into value-added compounds with nominal emission of harmful gases. This research aims to explore the synthesis of graphene quantum dots (GQDs) from Styrofoam waste through hydrothermal pyrolysis and convert it into a high-utility, value-added product. The successful formation of GQDs was confirmed through multiple characterization techniques: transmission electron microscopy revealed a uniform size distribution of 6 ± 1 nm; dynamic light scattering confirmed all GQD samples were below 10 nm; Raman spectroscopy identified the presence of a single-layered graphene structure; and X-ray photoelectron spectroscopy demonstrated the incorporation of nitrogen and oxygen functionalities. The quantum yield of GQDs increased with increase in reaction temperature and the edge functionalities, giving a peak value of 1.87 as confirmed using photoluminescence and UV-Vis spectroscopy, indicating their suitability for enhanced optical performance. The synthesized GQDs were explored as sensors for the detection of heavy metal ions in water. The sensor showed versatility and efficacy for copper ions across different pH levels, water sources, and anions present in various copper salts. Ultimately the concentration of unknown copper ion solutions was calculated from GQD-sensor-based RGB studies, matching closely with UV-Vis spectroscopy values of the unknown solutions. This work demonstrates a promising approach for the pyrolysis-based treatment of plastic waste, contributing to waste management and sustainability efforts.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrothermal Pyrolysis of Styrofoam Waste for Efficient Copper Ion Sensing Using Graphene Quantum Dots

Kumar,

Rani,

Mathew

et al. 2024

ACS Sustainable Resour. Manage.

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Synthesis, properties, and applications of polyaniline–graphene quantum dot nanocomposites: Comprehensive review

Beygisangchin,

Kamarudin,

Rashid

2024

Journal of Environmental Chemical Engineering

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GQD-PAN-based high-performance supercapacitor: an approach towards wealth from waste

Abstract: Managing non-biodegradable polymeric waste and search for efficient energy materials are growing concerns which needs immediate attention. The two highly demanding problems were solved together by synthesizing nonpolar Graphene Quantum...

Cited by 2 publications

References 107 publications

Hydrothermal Pyrolysis of Styrofoam Waste for Efficient Copper Ion Sensing Using Graphene Quantum Dots

Hydrothermal Pyrolysis of Styrofoam Waste for Efficient Copper Ion Sensing Using Graphene Quantum Dots

Synthesis, properties, and applications of polyaniline–graphene quantum dot nanocomposites: Comprehensive review

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