Fabrication of metal-free 2D/2D g-C3N4/rGO composite towards the degradation of harmful organics

Kasinathan, Maruthathurai; Thiripuranthagan, Sivakumar; Sivakumar, A.

doi:10.1016/j.ijleo.2020.165023

Cited by 13 publications

(3 citation statements)

References 25 publications

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“…Photogenerated holes were captured using ammonium oxalate (AO), hydroxide radicals were trapped using isopropanol (IPA), photogenerated electrons were captured with potassium dichromate (KCR), and superoxide radicals were scavenged using p -benzoquinone (BQ). 11,35,83 The introduction of these scavengers resulted in a substantial reduction in photocatalytic activity, as depicted in Fig. 15(a–c).…”

Section: Resultsmentioning

confidence: 96%

Enhanced photocatalytic performance of the N-rGO/g-C₃N₄ nanocomposite for efficient solar-driven water remediation

Gupta,

Kumar

2024

Nanoscale

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Section: Resultsmentioning

confidence: 96%

Enhanced photocatalytic performance of the N-rGO/g-C₃N₄ nanocomposite for efficient solar-driven water remediation

Gupta,

Kumar

2024

Nanoscale

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“…(αhν Additionally, we conducted photoluminescence (PL) and time-resolution photoluminescence (TRPL) spectra to analyze the reorganization of photogenerated charge intermediaries. Under normal conditions, a low PL intensity represents low charge recombination [58]. It can be observed from Figure 3e that PCN appeared to have the highest intensity, whereas GPCN-2 presented the lowest intensity among all catalysts, which proved that the g-C3N4/rGO heterojunction contributed to a reduction in the recombination of electron and hole, improving photocatalytic activity [59].…”

Section: Photology and Electrochemistry Peculiaritymentioning

confidence: 89%

Facile Synthesis of 3D Interconnected Porous g-C3N4/rGO Composite for Hydrogen Production and Dye Elimination

Zhao

Sun

et al. 2023

Catalysts

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Photocatalytic materials can effectively decompose water to produce hydrogen and degrade pollutants, ameliorating environmental issues. These materials are currently a popular research topic for addressing energy shortages and water pollution issues worldwide. Herein, we prepared composite catalysts with g-C3N4/rGO heterojunctions formed via the stacking of reduced graphene oxide (rGO) nanosheets and three-dimensional (3D) carbon nitride, and the catalysts displayed excellent photocatalytic activity in experiments for hydrogen production (4.37 mmol g−1 h−1) and rhodamine B elimination (96.2%). The results of structural characterization showed that the recombination of rGO has no effect on the morphology of g-C3N4, and the photochemical characterization results showed that the photogenerated electron migration of the prepared composite was accelerated. Additionally, a possible mechanism of enhancement involving synergy between the 3D structure of the catalyst and the g-C3N4/rGO heterojunctions was proposed on the basis of catalyst characterization and photocatalytic experiments. The prepared composite catalysts had large specific surface areas and abundant adsorption sites due to the 3D structure, and the g-C3N4/rGO heterojunction provided high electron mobility, resulting in low recombination of photoinduced electron and hole pairs and high conductivity. Moreover, free radical species that may play a substantial role in the photocatalytic process were analyzed via free radical quenching experiments, and possible catalytic mechanisms were presented in this study.

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“…Although there are few reports on rGO/g-C 3 N 4 composite preparation, the reported photocatalytic efficiencies varied greatly, even in similar works that typically study the photocatalytic degradation of synthetic dyes, phenol halides, and antibiotics like ciprofloxacin and tetracycline [13,27,29,30]. Chen, Wang, and Hou studied rGO/g-C 3 N 4 for degrading BPA [22].…”

Section: Introductionmentioning

confidence: 99%

Using a Surface-Response Approach to Optimize the Photocatalytic Activity of rGO/g-C3N4 for Bisphenol A Degradation

et al. 2023

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Although environmental and clean energy research has identified graphitic carbon nitride impregnated with reduced graphene oxide (rGO/g-C3N4) as a potential, efficient non-metallic photocatalyst, its efficacy against Contaminants of Emerging Concern (CECs) is relatively unknown. This study reports an optimized photocatalyst (response surface methodology, RSM) to remove the plasticizer and endocrine disruptor bisphenol A (BPA) from water. The synthetic procedure included sonication of prepared particles of g-C3N4 and graphite oxide (rGO), followed by reduction with hydrazine (24 h reflux), increasing specific surface areas, and improving synthesis reproducibility. In optimal conditions, the produced photocatalyst (50 mg L–1) removed 90% of BPA (100 mL, 100 μg L−1) in 90 min (30 min in the dark + 60 min irradiated) using a UV source (centered at 365 nm, 26 W) and exhibiting pseudo-first-order kinetics. For comparison purposes, under the same experimental conditions, pure g-C3N4 removed 50% of the BPA solution. Radical scavenging tests identified the superoxide radical as the main reactive oxygen species involved in the degradation. Two major degradation products were identified by mass spectrometry, both of them less ecotoxic than BPA to a variety of test organisms, according to in silico estimations (ECOSAR 2.0).

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Fabrication of metal-free 2D/2D g-C3N4/rGO composite towards the degradation of harmful organics

Cited by 13 publications

References 25 publications

Enhanced photocatalytic performance of the N-rGO/g-C₃N₄ nanocomposite for efficient solar-driven water remediation

Enhanced photocatalytic performance of the N-rGO/g-C₃N₄ nanocomposite for efficient solar-driven water remediation

Facile Synthesis of 3D Interconnected Porous g-C3N4/rGO Composite for Hydrogen Production and Dye Elimination

Using a Surface-Response Approach to Optimize the Photocatalytic Activity of rGO/g-C3N4 for Bisphenol A Degradation

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Fabrication of metal-free 2D/2D g-C3N4/rGO composite towards the degradation of harmful organics

Cited by 13 publications

References 25 publications

Enhanced photocatalytic performance of the N-rGO/g-C3N4 nanocomposite for efficient solar-driven water remediation

Enhanced photocatalytic performance of the N-rGO/g-C3N4 nanocomposite for efficient solar-driven water remediation

Facile Synthesis of 3D Interconnected Porous g-C3N4/rGO Composite for Hydrogen Production and Dye Elimination

Using a Surface-Response Approach to Optimize the Photocatalytic Activity of rGO/g-C3N4 for Bisphenol A Degradation

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Product

Resources

About

Enhanced photocatalytic performance of the N-rGO/g-C₃N₄ nanocomposite for efficient solar-driven water remediation

Enhanced photocatalytic performance of the N-rGO/g-C₃N₄ nanocomposite for efficient solar-driven water remediation