Facile Synthesis of MgO/C3N4 Nanocomposite for Removal of Reactive Orange 16 Under Visible Light

Fathi, Elham; Derakhshanfard, Fahimeh; Gharbani, Parvin; Tabatabaei, Zohreh Ghazi

doi:10.1007/s10904-019-01362-2

Cited by 26 publications

(13 citation statements)

References 40 publications

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“…The XRD patterns of the pristine MCN material, and the xMgO/MCN nanohybrids, manifested only a broad reflection positioned at a 2θ value of approximately 25.3° that can be well indexed to the (1 0 0) crystallographic plane of graphite (JCPDS 87-1526) (Liu et al 2016). No diffraction lines corresponding to crystalline magnesiumcontaining species were seen in composites with MgO contents up to 20 wt%, signifying that magnesium species were uniformly distributed in the MCN matrix (Fathi et al 2020). As can be noticed, when the MgO content reached 20 wt%, the (0 0 2) and (2 0 2) reflections of MgO emerged at 2θ of 44° and 62°, respectively (JCPDS No.…”

Section: Characterizationmentioning

confidence: 99%

“…5. The spectra of MCN show bands at 3386.53 cm −1 , 1534.16 cm −1 , and 1177.38 cm −1 , which are the result of the stretching modes of N-H bonds in -NH 2 or = NH groups, C = N bonds, and aromatic C − N bonds, respectively (Dodangeh et al 2021;Fathi et al 2020). Furthermore, the stretching absorption peak of the − C≡N groups in the vicinity of 2200 cm −1 was not observed, implying that MCN contains s-triazine building units in their skeleton.…”

Section: Characterizationmentioning

confidence: 99%

“…Figure 13 b depicts the FT-IR analysis of the sample after CO 2 capture. The IR spectrogram revealed the preservation of the peaks that correspond to the catalyst's skeleton, such as the peaks at 3395, 1535, and 1179 cm −1 , which corresponded to N-H bonds in -NH 2 or = NH groups, C = N bonds, and aromatic C-N bonds, respectively (Dodangeh et al 2021;Fathi et al 2020). Furthermore, the peak at 888 cm -1 is related to heptazine ring bending (Deng and Li 2018).…”

Section: Cyclic Adsorption Performancementioning

confidence: 99%

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Mesoporous carbon nitride supported MgO for enhanced CO2 capture

Refaat

Sadgal

Naga

et al. 2023

Environ Sci Pollut Res

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The growing concern about the environmental consequences of anthropogenic CO2 emissions significantly stimulated the research of low-cost, efficient, and recyclable solid adsorbents for CO2 capture. In this work, a series of MgO-supported mesoporous carbon nitride adsorbents with different MgO contents (xMgO/MCN) was prepared using a facile process. The obtained materials were tested for CO2 capture from 10 vol% CO2 mixture gas with N2 using a fixed bed adsorber at atmospheric pressure. At 25 ºC, the bare MCN support and unsupported MgO samples demonstrated CO2 capture capacities of 0.99, and 0.74 mmol g−1, respectively, which were lower than those of the xMgO/MCN composites.The incorporation of MgO into the MCN improved the CO2 uptake, and the 20MgO/MCN exhibited the highest CO2 capture capacity of 1.15 mmol g−1 at 25 °C. The improved performance of the 20MgO/MCN nanohybrid can be possibly assigned to the presence of high content of highly dispersed MgO NPs along with its improved textural properties in terms of high specific surface area (215 m2g−1), large pore volume (0.22 cm3g−1), and abundant mesoporous structure. The efffects of temperature and CO2 flow rate were also investigated on the CO2 capture performance of 20MgO/MCN. Temperature was found to have a negative influence on the CO2 capture capacity of the 20MgO/MCN, which decreased from 1.15 to 0.65 mmol g−1with temperature rise from 25 C to 150º C, due to the endothermicity of the process. Similarly, the capture capacity decreased from 1.15 to 0.54 mmol g−1 with the increase of the flow rate from 50 to 200 ml minute−1 respectively. Importantly, 20MgO/MCN showed excellent reusability with consistent CO2 capture capacity over five sequential sorption–desorption cycles, suggesting its suitability for the practical capture of CO2.

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Section: Characterizationmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Section: Cyclic Adsorption Performancementioning

confidence: 99%

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Mesoporous carbon nitride supported MgO for enhanced CO2 capture

Refaat

Sadgal

Naga

et al. 2023

Environ Sci Pollut Res

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“…Therefore, the removal of these compounds from water sources is necessary. These compounds can be removed using various treatment methods, including coagulation and occulation [6], electrochemical decomposition [7], biodegradation [8], photocatalytic decomposition [9], adsorption [10], ion exchange processes [11], and irradiation [12]. Bioremediation was recently introduced as the primary procedure globally used to restore polluted ecosystems using biological tools such as enzymes [13][14].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Chitosan-Carbon Nanotubes Decorated with ZnO@laccase: Application in the Removal of Bisphenol A from Aqueous Solution

Ahari

Tabatabaei

2022

Preprint

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Bioremediation with immobilized enzymes has been established as the leading method for restoring contaminated ecosystems using biological tools on a global scale. The purpose of this work is to immobilize the laccase enzyme to enhance the biocatalyst′s ability to remove bisphenol A. Initially, the nanocatalyst was prepared by immobilizing laccase on chitosan using carbon nanotubes decorated with zinc oxide. Subseuentally, Fourier Transformed Infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Field Emission Scanning, and Transmission Electron Microscopy (FESEM and TEM respectively), Energy-dispersive X-ray spectroscopy (EDX), and dot mapping were employed to characterize the prepared nanocomposites. Furthermore, laccase activity, immobilization yield (%), thermal and storage stability and reusability of laccase immobilized on chitosan-coated CNTs/ZnO nanocomposites were measured. Finally, the performance CS-CNTs/ZnO@laccase nano biocatalyst in different operational conditions (initial concentration of bisphenol A, amount of nano biocatalyst, pH, and irradiation time) on the photodegradation process of bisphenol A was investigated and optimized using the response surface methodology (RSM)-central composite design (CCD) model. The RSM design and experiments demonstrated that 94.51% of BPA was removed under optimal conditions (initial BPA concentration of 100 mg L-1, nano biocatalyst amount of 1 g L−1, pH=9, and 40 min of contact exposure). Laccase was a critical factor in this process, and after five recycles, immobilized laccase retained 61% of its original activity, indicating that the nano biocatalyst can be used in purification processes as a durable and robust catalyst.

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“…[6][7][8] Its advantages include good stability, a suitable range of bandgap energy, which is excited by the solar irradiation (i.e., E g = 2.4-2.8 eV), extensive twodimensional (2D) structures, physicochemical and photochemical stability. [9][10][11][12] The advantage of g-C 3 N 4 relative to other graphitic-based semiconductors is the good thermal stability even up to 500 C and high chemical stability against the powerful oxidation reactions. [13,14] Although pristine g-C 3 N 4 can absorb visible-light radiation energy from 400 to 800 nm, it has some limitations such as low surface area, the ineffective removal of the specific contaminants, high electron-hole recombination rate, and insufficient absorption of visible-light energy.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic activity enhancement of carbon‐doped g‐C₃N₄ by synthesis of nanocomposite with Ag₂O and α‐Fe₂O₃

Amani‐Ghadim

Ashan²,

Mohseni-Zonouz

et al. 2021

J Chinese Chemical Soc

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Carbon-doped g-C 3 N 4 (CGNS) nanocomposite with Ag 2 O and α-Fe 2 O 3 has been synthesized to improve g-C 3 N 4 photocatalytic activity. The prepared CGNS/Ag 2 O/α-Fe 2 O 3 (GAF [with mass ratio 3:2:1]) nanocomposite exhibits the expanded visible-light absorption region leading to the enhanced photocatalytic performance for Acid Red 14 (AR14) degradation. Besides, it is found that the recombination rate of the charge carriers effectively suppresses the nanocomposite. For a better understanding of the photocatalytic degradation mechanism, the reactions have been performed in the presence of different scavengers. The experiments indicate that superoxide anion radicals possess a more influential role in AR14 degradation in comparison with hydroxyl radicals and holes. The degradation efficiency has been decreased from 94.68 to 85.60 after five consecutive photocatalytic tests implying that the prepared nanocomposite is a stable photocatalyst. In the end, the kinetic study of AR14 degradation on nanocomposite with considering pseudo-first-order kinetics results in a nonlinear empirical kinetic model development for prediction of degradation efficiency of AR14 on nanocomposite.

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Facile Synthesis of MgO/C3N4 Nanocomposite for Removal of Reactive Orange 16 Under Visible Light

Cited by 26 publications

References 40 publications

Mesoporous carbon nitride supported MgO for enhanced CO2 capture

Mesoporous carbon nitride supported MgO for enhanced CO2 capture

Preparation of Chitosan-Carbon Nanotubes Decorated with ZnO@laccase: Application in the Removal of Bisphenol A from Aqueous Solution

Photocatalytic activity enhancement of carbon‐doped g‐C₃N₄ by synthesis of nanocomposite with Ag₂O and α‐Fe₂O₃

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Facile Synthesis of MgO/C3N4 Nanocomposite for Removal of Reactive Orange 16 Under Visible Light

Cited by 26 publications

References 40 publications

Mesoporous carbon nitride supported MgO for enhanced CO2 capture

Mesoporous carbon nitride supported MgO for enhanced CO2 capture

Preparation of Chitosan-Carbon Nanotubes Decorated with ZnO@laccase: Application in the Removal of Bisphenol A from Aqueous Solution

Photocatalytic activity enhancement of carbon‐doped g‐C3N4 by synthesis of nanocomposite with Ag2O and α‐Fe2O3

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Product

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About

Photocatalytic activity enhancement of carbon‐doped g‐C₃N₄ by synthesis of nanocomposite with Ag₂O and α‐Fe₂O₃