Unlocking the potential of thermally exfoliated ultrathin g-C<sub>3</sub>N<sub>4</sub> nanosheets: abundant active sites for enhanced solar photocatalysis

Das, Suma; Pramanik, Sandipan; Nair, Ranjith G.; Chowdhury, Avijit

doi:10.1039/d3nj01946b

Cited by 4 publications

(1 citation statement)

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“…143 UV light response of the freestanding ZnO nanorod array with a layer of monolayer graphene (MLG) based Schottky junction photodetector was reported. 144,145 Graphitic carbon nitride (g-C 3 N 4 ) is a metal-free polymeric semiconductor with a bandgap of 2.7 eV, 146–148 featuring a molecular arrangement akin to graphite, comprised of a layered structure with sp 2 -hybridized nitrogen and carbon atoms. 149,150 Unlike graphene, the optical properties of g-C 3 N 4 can be further tuned by modifying different parameters like the C to N ratio, defect engineering, and degree of polymerization.…”

Section: Advantages Of 2d Materials For Optoelectronic Synaptic Devicesmentioning

confidence: 99%

Recent developments in the state-of-the-art optoelectronic synaptic devices based on 2D materials: a review

Jana,

Ghosh,

Bhunia

et al. 2024

J. Mater. Chem. C

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Section: Advantages Of 2d Materials For Optoelectronic Synaptic Devicesmentioning

confidence: 99%

Recent developments in the state-of-the-art optoelectronic synaptic devices based on 2D materials: a review

Jana,

Ghosh,

Bhunia

et al. 2024

J. Mater. Chem. C

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Conductive Islands Assisted Resistive Switching in Biomimetic Artificial Synapse for Associative Learning and Image Recognition

Jana,

Bhunia,

Paramanik

et al. 2024

Adv Funct Materials

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Solution‐processed memristor devices hold significant potential for advancing synaptic applications, offering scalable, cost‐effective, and efficient solutions for next‐generation neuromorphic systems. These devices replicate the behavior of biological synapses with their gradual and continuous changes in resistance, making them promising for neuromorphic computing and artificial neural networks. However, understanding the temporal characteristics and cumulative effect of successive pulses on the devices is essential for emulating the dynamics of biological synapses. This study proposes a hybrid materials‐based conductive islands‐assisted resistive switching (CIARS) in a solution‐processed active layer consisting of thermally exfoliated graphitic carbon nitride (g‐C3N4 abbreviated as CN) nanosheets embedded with silver nanoparticles (Ag NPs). The fabricated devices demonstrate repeatable and bipolar memory features with a lower operating voltage (≤0.5 V), emulating the frequency and amplitude‐dependent synaptic plasticities. The threshold switching occurs due to the formation of conduction filaments (CFs) of silver ion (Ag+), whereas the analog behavior results from the voltage pulse‐dependent modulation of Schottky barrier height combined with metallic CFs formation. The experimental findings demonstrate the efficacy of the CIARS mechanism within the material platform, highlighting its potential for applications in associative learning, Morse code detection, and image recognition.

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Rational Design of Mesoporous ZnFe₂O₄@g‐C₃N₄ Heterojunctions for Environmental Remediation and Hydrogen Evolution

Das,

Paramanik,

Nair

et al. 2024

Chemistry A European J

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Mesoporous catalysts with a high specific surface area, accessible pore structures, and appropriate band edges are desirable for optimal charge transfer across the interfaces, suppress electron‐hole recombination, and promote redox reactions at the active sites. The present study demonstrates the rational design of mesoporous ZnFe2O4@g‐C3N4 magnetic nanocomposites (MNCs) with different pore sizes and pore volumes following a combination of facile thermal itching and thermal impregnation methods. The MNCs preserve the structural, morphological, and physical attributes of their counterparts while ensuring their effectiveness and superior catalytic capabilities. The morphological analysis confirms the successful grafting and confinement of ZnFe2O4 nanoparticles with the polymeric g‐C3N4 nanosheets to form heterojunctions with numerous interfaces. The MNCs possess uniformly distributed small mesopores (pore size <4 nm), ample active sites, and a high specific surface area of 62.50 m2/g. The mesoporous ZnFe2O4@g‐C3N4 notably improve hydrogen evolution rate and methylene blue dye degradation. The optimal loading weight of ZnFe2O4 is 20%, in which the MNCs display the highest hydrogen evolution rate of 1752 µmolg‐1h‐1 and photo‐Fenton dye degradation rate constants of 0.147 min−1, upon solar‐light illumination. Furthermore, the photocatalysts demonstrate recyclability over five consecutive cycles, confirming their stability, while easy separation using a simple magnet underscores practical utility.

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Unlocking the potential of thermally exfoliated ultrathin g-C₃N₄ nanosheets: abundant active sites for enhanced solar photocatalysis

Abstract: Tailoring surface properties of the catalysts by introducing various functional groups with superior adsorption properties has been a promising strategy to boost photocatalytic performances. In this study, the thermal exfoliation...

Cited by 4 publications

References 63 publications

Recent developments in the state-of-the-art optoelectronic synaptic devices based on 2D materials: a review

Recent developments in the state-of-the-art optoelectronic synaptic devices based on 2D materials: a review

Conductive Islands Assisted Resistive Switching in Biomimetic Artificial Synapse for Associative Learning and Image Recognition

Rational Design of Mesoporous ZnFe₂O₄@g‐C₃N₄ Heterojunctions for Environmental Remediation and Hydrogen Evolution

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Unlocking the potential of thermally exfoliated ultrathin g-C3N4 nanosheets: abundant active sites for enhanced solar photocatalysis

Abstract: Tailoring surface properties of the catalysts by introducing various functional groups with superior adsorption properties has been a promising strategy to boost photocatalytic performances. In this study, the thermal exfoliation...

Cited by 4 publications

References 63 publications

Recent developments in the state-of-the-art optoelectronic synaptic devices based on 2D materials: a review

Recent developments in the state-of-the-art optoelectronic synaptic devices based on 2D materials: a review

Conductive Islands Assisted Resistive Switching in Biomimetic Artificial Synapse for Associative Learning and Image Recognition

Rational Design of Mesoporous ZnFe2O4@g‐C3N4 Heterojunctions for Environmental Remediation and Hydrogen Evolution

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Unlocking the potential of thermally exfoliated ultrathin g-C₃N₄ nanosheets: abundant active sites for enhanced solar photocatalysis

Rational Design of Mesoporous ZnFe₂O₄@g‐C₃N₄ Heterojunctions for Environmental Remediation and Hydrogen Evolution