Pulsed laser ablation based synthetic route for nitrogen-doped graphene quantum dots using graphite flakes

Kang, Sung-Myung; Jeong, Young Kyu; Ryu, Jeong Ho; Son, Yong; Kim, Won Rae; Lee, Byoung-Soo; Jung, Kyung‐Hoon; Kim, Kang Min

doi:10.1016/j.apsusc.2019.144998

Cited by 63 publications

(42 citation statements)

References 36 publications

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“…The C-QDs are then produced through physical shearing of the carbon structure of the target and by incorporating the dopant atoms from the precursor solution. Nitrogen, oxygen, and sulfur doped on C-QDs were reported successfully prepared through this method [ 104 , 107 , 108 ]. The properties of the synthesized C-QDs strongly depend on the laser power, precursors, target type, and the concentration of the precursor solution.…”

Section: Properties and Preparation Of Carbon-based Quantum Dots (mentioning

confidence: 99%

Carbon-Based Quantum Dots for Supercapacitors: Recent Advances and Future Challenges

et al. 2021

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Carbon-based Quantum dots (C-QDs) are carbon-based materials that experience the quantum confinement effect, which results in superior optoelectronic properties. In recent years, C-QDs have attracted attention significantly and have shown great application potential as a high-performance supercapacitor device. C-QDs (either as a bare electrode or composite) give a new way to boost supercapacitor performances in higher specific capacitance, high energy density, and good durability. This review comprehensively summarizes the up-to-date progress in C-QD applications either in a bare condition or as a composite with other materials for supercapacitors. The current state of the three distinct C-QD families used for supercapacitors including carbon quantum dots, carbon dots, and graphene quantum dots is highlighted. Two main properties of C-QDs (structural and electrical properties) are presented and analyzed, with a focus on the contribution to supercapacitor performances. Finally, we discuss and outline the remaining major challenges and future perspectives for this growing field with the hope of stimulating further research progress.

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Section: Properties and Preparation Of Carbon-based Quantum Dots (mentioning

confidence: 99%

Carbon-Based Quantum Dots for Supercapacitors: Recent Advances and Future Challenges

et al. 2021

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“…To date, several carbon-based resources have been used to synthesise GQDs, such as graphite flakes 16 , carbon nanotubes 17 , graphene 18 , carbon fibre 19 , coal 20 and others 21 , 22 . A number of synthesis techniques have been adopted such as hydrothermal 18 , 23 , electrochemical 24 , 25 , sonochemical 26 , solvothermal 11 , 27 , 28 , laser ablation 29 , microwave cutting 30 , etc. Among these approaches, microwave treatment is indeed beneficial due to its uniform and rapid heating, thereby leading to extremely short reaction time 31 .…”

Section: Introductionmentioning

confidence: 99%

High yield synthesis of graphene quantum dots from biomass waste as a highly selective probe for Fe3+ sensing

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et al. 2020

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146

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Graphene quantum dots (GQDs), a novel type of zero-dimensional fluorescent materials, have gained considerable attention owing to their unique optical properties, size and quantum confinement. However, their high cost and low yield remain open challenges for practical applications. In this work, a low cost, green and renewable biomass resource is utilised for the high yield synthesis of GQDs via microwave treatment. The synthesis approach involves oxidative cutting of short range ordered carbon derived from pyrolysis of biomass waste. The GQDs are successfully synthesised with a high yield of over 84%, the highest value reported to date for biomass derived GQDs. As prepared GQDs are highly hydrophilic and exhibit unique excitation independent photoluminescence emission, attributed to their single-emission fluorescence centre. As prepared GQDs are further modified by simple hydrothermal treatment and exhibit pronounced optical properties with a high quantum yield of 0.23. These modified GQDs are used for the highly selective and sensitive sensing of ferric ions (Fe3+). A sensitive sensor is prepared for the selective detection of Fe3+ ions with a detection limit of as low as 2.5 × 10–6 M. The utilisation of renewable resource along with facile microwave treatment paves the way to sustainable, high yield and cost-effective synthesis of GQDs for practical applications.

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“…Indeed, the location of the main peak for carbon particles in pure water (Samples B_W1 and C_W1W2) varies from that of the target. Nanoparticles obtained during laser ablation are considered to be highly dependent on the initial states of the precursor (e.g., solid target and/or dispersion in liquid medium) [ 36 ]. Nevertheless, the presented results show that using high fluence values (exceeding 10 J cm −2 ) enables the creation of structures disparate from the initial material.…”

Section: Discussionmentioning

confidence: 99%

Improved Laser Ablation Method for the Production of Luminescent Carbon Particles in Liquids

et al. 2021

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An improved method for the production of luminescent carbon nanoparticles is proposed in this work. The new method overcomes the disadvantages of commonly used approaches. It involves two-stage laser ablation in water and in aqueous solutions, where the first stage is the laser ablation of a graphite target and the second is the shredding of particles produced in the first step. The two-stage method offers the optimization of the laser pulse fluence for the performance of each process. It was found that the two-stage process of laser ablation allows producing photoluminescent carbon structures in pure water. The additional reagent may be added either in the first or second stage. The first stage performed in pure water allows avoiding the contamination of the target. Moreover, it simplifies the identification of the origin of photoluminescence. Two synthesis routes for the preparation of carbon nanoparticles by the proposed method using pure water as well as urea aqueous solution are investigated. It was found that the use of urea as a reagent results in luminescence properties similar to those obtained with other more hazardous amine-based reagents. The influence of the synthesis approach and process parameters on the structural and luminescent properties of nanoparticles is also explored in this work.

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Pulsed laser ablation based synthetic route for nitrogen-doped graphene quantum dots using graphite flakes

Cited by 63 publications

References 36 publications

Carbon-Based Quantum Dots for Supercapacitors: Recent Advances and Future Challenges

Carbon-Based Quantum Dots for Supercapacitors: Recent Advances and Future Challenges

High yield synthesis of graphene quantum dots from biomass waste as a highly selective probe for Fe3+ sensing

Improved Laser Ablation Method for the Production of Luminescent Carbon Particles in Liquids

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