Nitrogen-doped carbon quantum dots (N-CQDs)/Co3O4 nanocomposite for high performance supercapacitor

Naushad, Mu.; Ahamad, Tansir; Ubaidullah, Mohd; Ahmed, Jahangeer; Ghafar, Ayman Abdel; Alsheetan, Khalid M.; Arunachalam, Prabhakarn

doi:10.1016/j.jksus.2020.101252

Cited by 50 publications

(23 citation statements)

References 27 publications

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“…On the contrary, nitrogen‐doped carbon dots (N‐CDs) are characterised by excellent photochemical and physicochemical properties and simple green synthesis procedures (Wang et al., 2020). Nitrogen doping changes not only the surface chemistry (alkaline and hydrophilic/lipophilic) of CDs but also their electronic structure by providing electrons through arc and neutralisation charge distribution (Liu et al., 2021; Naushad et al., 2021; Vercelli et al., 2021). Quantum dots are widely employed as fluorescent probe materials, but their use as sensing components in electrochemical detection is still limited (Rao et al., 2018; Hatamluyi et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

A molecularly imprinted electrochemical sensor based on a MoS₂/peanut shell carbon complex coated with AuNPs and nitrogen‐doped carbon dots for selective and rapid detection of benzo(a)pyrene

Chi

Liu

2022

Int J of Food Sci Tech

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In this study, a new electrochemical strategy based on the fabrication of a molecularly imprinted sensor onto a MoS 2 -loaded peanut shell carbon complex with gold nanoparticles (AuNPs) and nitrogen-doped carbon dots (N-CDs) was proposed for the detection of benzo(a)pyrene (BaP). Molecularly imprinted polymer (MIP) films were prepared by cyclic voltammetry (CV) using 2-mercaptobenzimidazole (2-MBI) as a functional monomer in the presence of BaP. The surface morphologies, structural characteristics and electrochemical properties of the obtained MIP/AuNPs/N-CDs/PSBC/MoS 2 /GCE were investigated via scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive spectrometry (EDS), Fourier transform infrared spectrometry (FTIR), X-ray diffraction (XRD), UV-Vis spectrometry, fluorescence spectrometry, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Under the optimised conditions, the detection range of the electrode towards BaP varied from 5 nM to 20 μM with a detection limit of 1.5 nM. The prepared electrochemical sensor also exhibited good stability, relevant reproducibility and high selectivity. The application of the sensor in the actual analysis of edible oil samples showed promising results, thereby being relevant as a biomimetic sensing platform for the detection of chemical hazards in food and environment.Keywords Benzo(a)pyrene, electrochemical sensor, molecularly imprinted polymer, nitrogen-doped carbon dots, peanut shell carbon.

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Section: Introductionmentioning

confidence: 99%

A molecularly imprinted electrochemical sensor based on a MoS₂/peanut shell carbon complex coated with AuNPs and nitrogen‐doped carbon dots for selective and rapid detection of benzo(a)pyrene

Chi

Liu

2022

Int J of Food Sci Tech

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“…For supercapacitors, CMPs are generally used as carbon, nitrogen, and heteroatom sources for the preparation of non-doped and doped microporous carbon electrodes by pyrolysis process. The presence of dopants such as nitrogen atoms and other heteroatoms in the resulting carbons strongly enhance the supercapacitor’s capacitances via increasing their conductivities [ 48 , 49 , 50 , 51 ]. Regrettably, the pyrolyzed carbons from such polymers have either poor capacitance or restricted cycling durability, with little discernible advantage over traditional porous carbon materials.…”

Section: Introductionmentioning

confidence: 99%

A Tröger’s Base-Derived Covalent Organic Polymer Containing Carbazole Units as a High-Performance Supercapacitor

et al. 2021

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Porous organic polymers have been received considerable attention due to their heteroatom-containing structures and high surface areas, which can offer high electrochemical performance in energy applications. The majority of reported Tröger’s base-functionalized porous organic polymers have been applied as effective candidates for sensing and gas separation/adsorption, while their use as electrode materials in supercapacitors is rare. Here, a novel covalent microporous organic polymer containing carbazole and Tröger’s base CzT-CMOP has been successfully synthesized through the one-pot polycondensation of 9-(4-aminophenyl)-carbazole-3,6-diamine (Cz-3NH2) with dimethoxymethane. The polycondensation reaction’s regioselectivity was studied using spectroscopic analyses and electronic structure calculations that confirmed the polycondensation occurred through the second and seventh positions of the carbazole unit rather than the fourth and fifth positions confirmed by first-principles calculations. Our CzT-CMOP exhibited high thermal stability of approximately 463.5 °C and a relatively high Brunauer–Emmett–Teller surface area of 615 m2 g−1 with a nonlocal density functional theory’s pore size and volume of 0.48 cm3 g−1 and 1.66 nm, respectively. In addition, the synthesized CzT-CMOP displayed redox activity due to the existence of a redox-active carbazole in the polymer skeleton. CzT-CMOP revealed high electrochemical performance when used as active-electrode material in a three-electrode supercapacitor with an aqueous electrolyte of 6 M KOH, and it showed specific capacitance of 240 F g−1 at a current density of 0.5 A g−1 with excellent stability after 2000 cycles of 97% capacitance retention. Accordingly, such porous organic polymer appears to have a variety of uses in energy-related applications.

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“…The literature review has indicated that composite formation of nanomaterials is a good way to enhanced the performance of the electrode especially improvement in the energy density value of the material [5]. In this paper, we used carbonaceous nanocomposite namely CT and CCT through analysis of XRD, FESEM and electrochemical analyser.…”

Section: Introductionmentioning

confidence: 99%

Structural, Microstructural and Electrochemical Properties of Carbonaceous Nanocomposite for Supercapacitor Applications

Tanwar

Singh

Sharma

2021

Springer Proceedings in Materials

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In this paper, we prepared CCT nanocomposite comprising of Co 3 O 4 , carbon black and TiO 2 via microwave-assisted sol-gel technique. The composite is designed as electrode material for supercapacitor application. We have synthesised two samples namely CT and CCT where CT is optimised composite of carbon black and TiO 2 nanoparticle, and CCT is composite of Co 3 O 4 , carbon black and TiO 2, respectively. The prepared electrode material has been characterised by X-ray diffraction, field emission scanning electron microscopy, cyclic voltammetry (CV), galvanostatic charging-discharging (GCD) and electrochemical impedances spectroscopy (EIS). The structural and microstructural characterisation of the material confirms the formation of the crystal structure and nanocomposite. The CCT material shows better specific capacitances of 250 F g −1 at a rate of ten millivolts per second which is advanced than that of CT composite. The CCT sample exhibits energy density (E d ) of 46 W h kg −1 at corresponding power density (P d ) of value around two thousand watt per kilogram. The analysed result reveals that the prepared CCT nanocomposite can be considered as potential electrode material for supercapacitor applications.

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Nitrogen-doped carbon quantum dots (N-CQDs)/Co3O4 nanocomposite for high performance supercapacitor

Cited by 50 publications

References 27 publications

A molecularly imprinted electrochemical sensor based on a MoS₂/peanut shell carbon complex coated with AuNPs and nitrogen‐doped carbon dots for selective and rapid detection of benzo(a)pyrene

A molecularly imprinted electrochemical sensor based on a MoS₂/peanut shell carbon complex coated with AuNPs and nitrogen‐doped carbon dots for selective and rapid detection of benzo(a)pyrene

A Tröger’s Base-Derived Covalent Organic Polymer Containing Carbazole Units as a High-Performance Supercapacitor

Structural, Microstructural and Electrochemical Properties of Carbonaceous Nanocomposite for Supercapacitor Applications

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Nitrogen-doped carbon quantum dots (N-CQDs)/Co3O4 nanocomposite for high performance supercapacitor

Cited by 50 publications

References 27 publications

A molecularly imprinted electrochemical sensor based on a MoS2/peanut shell carbon complex coated with AuNPs and nitrogen‐doped carbon dots for selective and rapid detection of benzo(a)pyrene

A molecularly imprinted electrochemical sensor based on a MoS2/peanut shell carbon complex coated with AuNPs and nitrogen‐doped carbon dots for selective and rapid detection of benzo(a)pyrene

A Tröger’s Base-Derived Covalent Organic Polymer Containing Carbazole Units as a High-Performance Supercapacitor

Structural, Microstructural and Electrochemical Properties of Carbonaceous Nanocomposite for Supercapacitor Applications

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A molecularly imprinted electrochemical sensor based on a MoS₂/peanut shell carbon complex coated with AuNPs and nitrogen‐doped carbon dots for selective and rapid detection of benzo(a)pyrene

A molecularly imprinted electrochemical sensor based on a MoS₂/peanut shell carbon complex coated with AuNPs and nitrogen‐doped carbon dots for selective and rapid detection of benzo(a)pyrene