Alkali metal (Na/ K) doped graphitic carbon nitride (g-C3N4) for highly selective and sensitive electrochemical sensing of nitrite in water and food samples

Jigyasa,; Pratibha, .; Rajput, Jaspreet Kaur

doi:10.1016/j.jelechem.2020.114605

Cited by 33 publications

(14 citation statements)

References 44 publications

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“…[ 84 ] The strong peak positioned at 2θ = 27.4° is attributed to the interplanar stacking of the conjugated aromatic framework, whereas the peak at 2θ = 13.1° relates to in‐plane repeating structural units of tri‐s‐triazine. [ 85,86 ] The XRD pattern of SCNNS also displayed the similar peaks at approximately same 2θ values but with a quite decrement in their intensities. Additionally, the intensification in broadness of the peaks was also noticed.…”

Section: Resultsmentioning

confidence: 75%

“…As can be seen from Figure 3a, the MFO was found to exist in the irregular spherical‐shaped nanoparticles morphology, having an average particle diameter of around 56.4 nm. In contrast, the prepared SCN was subsisted of thick and dense sheet‐like morphology [ 86 ] (Figure 3b). The HR‐TEM image of MFO:SCNNS (1:1) nanocomposite has been presented in Figure 3c.…”

Section: Resultsmentioning

confidence: 99%

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Synergistically enhanced solar light‐driven degradation of hazardous food colorants by ultrasonically derived MgFe₂O₄/S‐doped g‐C₃N₄ nanocomposite: A Z‐scheme system‐based heterojunction approach

Pratibha

Rajput

2022

Applied Organom Chemis

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Magnesium ferrite/sulfur‐doped graphitic nitride (MFO/SCNNS) heterostructure has been developed via sonication‐assisted deposition of zero‐dimensional MFO over the surface of two‐dimensional SCN nanosheets. Additionally, the prepared nanocomposite material has been characterized by several analytical characterization techniques including XRD, Fourier transform infrared (FT‐IR), high‐resolution transmission electron microscopy (HR‐TEM), selected‐area electron diffraction (SAED), energy‐dispersive spectrometry (EDS), Brunauer–Emmett–Teller (BET), vibrating sample magnetometer (VSM), UV–Vis. spectroscopy, electron spin resonance(ESR), and X‐ray photoelectron spectroscopy (XPS) which indicated the existence of strong interfacial interactions via heterojunction formation between MFO and SCNNS. The as prepared nanocomposite, especially MFO:SCNNS (1:1) (having 1:1 mass ratio of MFO to SCNNS), offered impressive photo‐response for the complete degradation of Erythrosine B and Indigo Carmine within 30 min under direct solar light irradiation. The enhanced photoactivity of the MFO:SCNNS (1:1) was also confirmed by the photoluminescence, photocurrent and electrochemical impedance spectroscopy. The Mott–Schottky analysis also depicts the formation of p‐n heterojunction at the interface of MFO and SCNNS, responsible for the enhanced photoactivity. Additionally, the degradation process has also been studied using mass spectrometry, UV–Vis, and ESR spectral analysis. The trapping experiments were also conducted to confirm the formation of active radical species during the photodegradation reaction. Furthermore, the nanocomposite photocatalytic material offered excellent stability and reusability and thus can serve as an effective candidate for environmental remediation application such as real waste water treatment.

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Section: Resultsmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Synergistically enhanced solar light‐driven degradation of hazardous food colorants by ultrasonically derived MgFe₂O₄/S‐doped g‐C₃N₄ nanocomposite: A Z‐scheme system‐based heterojunction approach

Pratibha

Rajput

2022

Applied Organom Chemis

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“…As can be seen from the XPS results of MOC (Figure a–c), there are peaks located at 54.9 and 1072.0 eV, which could correspond to Li 1s and Na 1s, respectively. The peaks located at 292.5 and 295.7 eV can be identified as K 2p 3/2 and K 2p 1/2 , respectively . The contents of Li, Na, and K in MOC samples are 3.01, 3.41, and 2.43 at % (Table S1), respectively.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Alkali Metals Functionalized Porous Carbon for Enhanced Selective Adsorption of Carbon Dioxide: A Theoretically Guided Study

Liu

Shi

et al. 2021

Energy Fuels

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Developing an adsorbent with high adsorption capacity and high selectivity is of great importance for the post-combustion CO2 capture. Inspired by the theoretical calculation findings that the introduction of alkali metal atoms (e.g., Li, Na, and K) into the carbon framework can significantly increase the CO2 adsorption capacity through the enhanced electrostatic interaction, herein, we have successfully developed a series of alkali metal doped carbons through a simple and effective strategy. The systematic characterization results prove that alkali metals are uniformly introduced into the carbon framework without changing the pore size distribution and amorphous structure of the original material, but slightly reducing the specific surface area. The adsorption performances from the static adsorption and the dynamic breakthrough experiments with a binary mixture of CO2/N2 (15/85, v/v) reveal that the doping of alkali metals can greatly enhance the capture and separation of CO2, in which the lithium-doped porous carbon presents the best CO2 uptake of 4.1 mmol/g at 25 °C (48.3% higher than that of undoped carbon) with the highest CO2/N2 selectivity of 47 and fastest adsorption rate. The high adsorption capacity and selectivity presented are comparable to the data reported in the previous literature. The density functional theory and grand canonical Monte Carlo molecular simulation results demonstrate that, compared with N2, alkali metal doped carbon has a stronger binding energy and higher adsorption density for CO2 and thus increases the CO2/N2 selectivity to a greater extent. This proof-of-concept work paves an alternative way for the development of high-performance CO2 adsorbents.

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“…9,10 The pure g-C 3 N 4 has been doped with metalbased and non-metal based dopants to overcome these limitations. [11][12][13][14][15][16][17] Another strategy to improve the photocatalytic activity of pure g-C 3 N 4 is by introducing mesoporosity.…”

Section: Introductionmentioning

confidence: 99%

Insight into the photodegradation mechanism of bisphenol-A by oxygen doped mesoporous carbon nitride under visible light irradiation and DFT calculations

et al. 2022

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Alkali metal (Na/ K) doped graphitic carbon nitride (g-C3N4) for highly selective and sensitive electrochemical sensing of nitrite in water and food samples

Cited by 33 publications

References 44 publications

Synergistically enhanced solar light‐driven degradation of hazardous food colorants by ultrasonically derived MgFe₂O₄/S‐doped g‐C₃N₄ nanocomposite: A Z‐scheme system‐based heterojunction approach

Synergistically enhanced solar light‐driven degradation of hazardous food colorants by ultrasonically derived MgFe₂O₄/S‐doped g‐C₃N₄ nanocomposite: A Z‐scheme system‐based heterojunction approach

Synthesis of Alkali Metals Functionalized Porous Carbon for Enhanced Selective Adsorption of Carbon Dioxide: A Theoretically Guided Study

Insight into the photodegradation mechanism of bisphenol-A by oxygen doped mesoporous carbon nitride under visible light irradiation and DFT calculations

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Alkali metal (Na/ K) doped graphitic carbon nitride (g-C3N4) for highly selective and sensitive electrochemical sensing of nitrite in water and food samples

Cited by 33 publications

References 44 publications

Synergistically enhanced solar light‐driven degradation of hazardous food colorants by ultrasonically derived MgFe2O4/S‐doped g‐C3N4 nanocomposite: A Z‐scheme system‐based heterojunction approach

Synergistically enhanced solar light‐driven degradation of hazardous food colorants by ultrasonically derived MgFe2O4/S‐doped g‐C3N4 nanocomposite: A Z‐scheme system‐based heterojunction approach

Synthesis of Alkali Metals Functionalized Porous Carbon for Enhanced Selective Adsorption of Carbon Dioxide: A Theoretically Guided Study

Insight into the photodegradation mechanism of bisphenol-A by oxygen doped mesoporous carbon nitride under visible light irradiation and DFT calculations

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Synergistically enhanced solar light‐driven degradation of hazardous food colorants by ultrasonically derived MgFe₂O₄/S‐doped g‐C₃N₄ nanocomposite: A Z‐scheme system‐based heterojunction approach

Synergistically enhanced solar light‐driven degradation of hazardous food colorants by ultrasonically derived MgFe₂O₄/S‐doped g‐C₃N₄ nanocomposite: A Z‐scheme system‐based heterojunction approach