Metal-Free Carbon-Based Nanomaterials: Insights from Synthesis to Applications in Sustainable Catalysis

Jaryal, Vishal Bharati; Villa, Alberto; Gupta, Neeraj

doi:10.1021/acssuschemeng.3c01452

Cited by 12 publications

(1 citation statement)

References 156 publications

(281 reference statements)

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“…Additionally, they are the best at identifying chemicals that are essential to the environment, biology and pharmaceuticals. This approach also depends on the effectiveness of the materials used as probes, which are often produced with the use of materials that are metal-based, [11] metal-free [12][13][14] and their hybrids. [15] However, electrochemical biosensing approaches frequently use metalfree 2D-carbon nanomaterials [16][17][18] because they perform more effectively than metal-based/hybrid metal sensors with regard to their non-toxicity, sustainability, easy availability, repeatability and flexibility.…”

Section: Introductionmentioning

confidence: 99%

Thiourea‐Modified Multiwalled Carbon Nanotubes as Electrochemical Biosensor for Ultra‐Precise Detection of Dopamine

Jaryal,

Kumar,

Singh

et al. 2024

ChemNanoMat

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Functionalized multi‐walled carbon nanotubes (MWCNTs) have enticed remarkable attention in the field of electrochemical sensing applications. Dopamine (DA) is a monoamine neurotransmitter released in the brain acting as a chemical messenger that communicates messages between nerve cells and the rest of the body. Therefore, there is a significant technological urge for the development of electrochemical sensors for DA in body fluids. In this context, nitrogen‐functionalized MWCNTs (TM‐CNT600) were fabricated by thermal annealing of carboxylic acid functionalized MWCNTs with thiourea at 600 oC under N2 atmosphere. The XPS spectrum reveals the presence of nitrogen‐containing functionalities in the as‐prepared TM‐CNT600. FTIR results show the presence of ‐OH, C‐N and C‐S functional groups. XPS further corroborates the FTIR results and quantifies the predominant functional groups in as‐prepared material. The material was investigated as a potential electrochemical sensor for the detection of dopamine (DA). In the case of TM‐CNT600/GCE, a linear relationship for DA concentration was observed in the range of 10.7 ‐ 24.2 μM with the limit of detection (LOD) of 1.42 μM using linear sweep voltammetry (LSV). These results highlight the potential of TM‐CNT600 modified GCE as an efficient sensor for the electrochemical detection of DA in body fluids.

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Section: Introductionmentioning

confidence: 99%

Thiourea‐Modified Multiwalled Carbon Nanotubes as Electrochemical Biosensor for Ultra‐Precise Detection of Dopamine

Jaryal,

Kumar,

Singh

et al. 2024

ChemNanoMat

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Coconut Husk Waste‐Derived Nitrogen‐Doped Mesoporous Carbon Nanomaterial as an Efficient and Sustainable Supercapacitor

Sharma,

Rana,

Kumar

et al. 2024

Energy Tech

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Sustainability and waste management are equally important in the era of growing energy demands. This study focuses on integrating strategies that balance energy efficiency, reduce waste generation, and promote sustainable practices. The coconut husk is processed and converted into mesoporous carbon nanomaterial through hydrothermal‐assisted thermal annealing. Nitrogen is doped through melamine to increase reactive sites and hence the catalytic activity. The sphere‐like morphology was confirmed by field emission scanning electron microscope and high‐resolution transmission electron microscope images indicate a carbon dot‐like structure. The high Brunauer‐Emmett‐Teller surface area achieved for this nanostructure is 1383.40 m2 g−1, with pore width and volume at 2.2660 nm and 0.2995 cm3 g−1, respectively. The as‐synthesized nanostructure is explored for its electrochemical performance as electrodes for the supercapacitor application, where materials achieve a wide potential window (−1.4 to 1.4 V) in the minimum time of 50 s at the current density of 0.6 A g−1. Moreover, the highest specific capacitance obtained from the nanomaterial is 115.39 F g−1 in the potential window and current density of 2 V and 0.6 A g−1, respectively. The energy density, power density, and coulombic efficiency at the set parameter are 62.31 Wh Kg−1, 1166.4 W Kg−1, and 79.61%, respectively. Finally, the practical device is assembled with the nanomaterial, where a red LED bulb glows after 1 min of charging.

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Fabrication of a Reversible Fluorescence Sensor Based on Nitrogen‐Sulfur Co‐Doped Multiwalled Carbon Nanotubes for Detection of Mercury Ions: Experimental and DFT Insights

Bharati Jaryal,

Singh,

Ali

et al. 2024

ChemistrySelect

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An eco‐friendly approach involving hydrothermal treatment followed by thermal annealing was adopted for the preparation of nitrogen‐sulfur co‐doped multi‐walled carbon nanotubes (NS‐CNT@600) using melamine and thiourea as precursors. The prepared NS‐CNT@600 were characterized using X‐Ray Photoelectron Spectroscopy (XPS), Fourier Transform Infrared Spectroscopy (FTIR), X‐Ray Diffraction (XRD), High‐Resolution Transmission Electron Microscopy (HR‐TEM), Ultraviolet and Visible Spectroscopy (UV‐Vis). They were applied for the fluorescent detection of Hg2+ ions in water. A fluorescence quenching sensor for sensitive and precise detection of Hg2+ ions was developed by making use of the sensitivity of NS‐CNT@600 to fluorescence quenching behavior caused by interaction with Hg2+ ions. Additionally, the selectivity of NS‐CNT@600 towards Hg2+ ions was thoroughly investigated in the presence of other interfering metal ions. There was a linear relationship between fluorescence intensity and Hg2+ concentration from 10 to 50 nM with a limit of detection (LOD) of 6.3 nM. The proposed method was also tested on real water samples with positive results. Physicochemical features and interaction mechanism of analyte‐material transduction were exclusively studied by combining fluorescence spectrophotometry and density functional theory (DFT) calculation techniques. The strategy provides an easy way to develop low‐cost, selective and sensitive probes for rapid fluorescent sensing of Hg2+ ions in aqueous solutions.

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Metal-Free Carbon-Based Nanomaterials: Insights from Synthesis to Applications in Sustainable Catalysis

Cited by 12 publications

References 156 publications

Thiourea‐Modified Multiwalled Carbon Nanotubes as Electrochemical Biosensor for Ultra‐Precise Detection of Dopamine

Thiourea‐Modified Multiwalled Carbon Nanotubes as Electrochemical Biosensor for Ultra‐Precise Detection of Dopamine

Coconut Husk Waste‐Derived Nitrogen‐Doped Mesoporous Carbon Nanomaterial as an Efficient and Sustainable Supercapacitor

Fabrication of a Reversible Fluorescence Sensor Based on Nitrogen‐Sulfur Co‐Doped Multiwalled Carbon Nanotubes for Detection of Mercury Ions: Experimental and DFT Insights

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