Photocatalytic oxidation of aromatic amines using MnO2@g-C3N4

Varma, Sanny Verma;Rajender S.

doi:10.5185/amlett.2017.1453

Cited by 14 publications

(6 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our results are in agreement with previous reports that showed pristine graphene to be a biocompatible substrate for adherent cells such as fibroblasts and osteoblasts [16,53]. Furthermore, we concur with previous studies that showed graphene surface functionalization with various chemical groups to be a major opportunity to develop various composite materials that can act as the active components in regenerative applications [30,31,34,54]. Interestingly, our work also clearly illustrates that decorating graphene with oxygen groups in various concentrations is easy to accomplish and does not seem to affect the material's interaction with the fibroblast cells used in this study.…”

Section: Discussionsupporting

confidence: 93%

Graphene-based 2D constructs for enhanced fibroblast support

et al. 2020

View full text Add to dashboard Cite

Complex skin wounds have always been a significant health and economic problem worldwide due to their elusive and sometimes poor or non-healing conditions. If not well-treated, such wounds may lead to amputation, infections, cancer, or even death. Thus, there is a need to efficiently generate multifunctional skin grafts that address a wide range of skin conditions, including non-healing wounds, and enable the regeneration of new skin tissue. Here, we propose studying pristine graphene and two of its oxygen-functionalized derivatives-high and low-oxygen graphene films-as potential substrates for skin cell proliferation and differentiation. Using BJ cells (human foreskin-derived fibroblasts) to represent basic skin cells, we show that the changes in surface properties of pristine graphene due to oxygen functionalization do not seem to statistically impact the normal proliferation and maturation of skin cells. Our results indicate that the pristine and oxidized graphenes presented relatively low cytotoxicity to BJ fibroblasts and, in fact, support their growth and bioactivity. Therefore, these graphene films could potentially be integrated into more complex skin regenerative systems to support skin regeneration. Because graphene's surface can be relatively easily functionalized with various chemical groups, this finding presents a major opportunity for the development of various composite materials that can act as active components in regenerative applications such as skin regeneration.

show abstract

Section: Discussionsupporting

confidence: 93%

Graphene-based 2D constructs for enhanced fibroblast support

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The high peak at 26.73° verifies the stacking reflection of conjugated aromatic systems, showing a graphitic structure with an interlayer distance of 0.326 nm, as shown in Fig. 2(E) 31,32 . The 3D character of graphene oxide is reduced, as indicated by the disappearance of the narrow XRD reflection at 2 θ = 10.8 A°.…”

Section: Resultsmentioning

confidence: 70%

“…2(E). 31,32 The 3D character of graphene oxide is reduced, as indicated by the disappearance of the narrow XRD reflection at 2⊔ = 10.8 A°. Instead, broadband is observed in the case of r-GO, probably due to intralayer spacing, as shown in Fig.…”

Section: Microscopic Characterization Of Nanomaterialsmentioning

confidence: 99%

Enhancing bioelectricity generation from wastewater in microbial fuel cells using carbon nanomaterials

Attia,

Samer,

Mohamed

et al. 2024

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Background: Microbial fuel cells (MFCs) offer a promising approach for treating wastewater and generating electrical energy simultaneously. However, their implementation in wastewater treatment plants is hindered by the limited electricity generation, often attributed to the electrolyte's high resistance. This study aimed to improve bioelectricity generation in MFCs by adding nanomaterials to the electrolyte to enhance conductivity.Results: Three types of nanomaterials, carbon nanotubes (CNTs), graphitic carbon nitride (g‐C3N4), and reduced graphene oxide (r‐GO), were synthesized and addition to the electrolyte at a concentration of 50 mg in 1.5 L. MFC performance was evaluated, employed a Hydraulic Retention Time (HRT) of 140 h, and compared to a control with no nanomaterials added. The addition of nanomaterials significantly improved MFC performance. Compared to the control, the MFCs with CNTs, g‐C3N4, and r‐GO exhibited: Higher voltage: 1.301 V (CNTs), 1.286 V (g‐C3N4), 1.280 V (r‐GO) vs. 0.570 V (control), Increased power density: 14.11 mW/m3 (CNTs), 13.78 mW/m3 (g‐C3N4), 13.66 mW/m3 (r‐GO) vs. 2.71 mW/m3 (control), Enhanced areal power density: 21.06 mW/m2 (CNTs), 20.57 mW/m2 (g‐C3N4), 20.39 mW/m2 (r‐GO) vs. 4.04 mW/m2 (control), and Improved coulombic efficiency: 19.43% (CNTs), 19.19% (g‐C3N4), 19.11% (r‐GO) vs. 8.54% (control).Conclusion: Incorporating nanomaterials into the MFC electrolyte significantly increased bioelectricity generation by 5.21 times and coulombic efficiency by 2.28 times compared to the control. This improvement is attributed to the high specific surface area of the nanomaterials, which facilitates the adhesion and growth of microorganisms around the anode, enhancing direct electron transfer.This article is protected by copyright. All rights reserved.

show abstract

“…The XRD pattern of pure-g-C 3 N 4 revealed that peaks at 26.73° and 13.37° can be assigned to (002) inter-layer structural packing crystal plane and (100) inter-planar stacking diffraction planes, respectively. The prominent peak at 26.73° confirms the stacking reflection of conjugated aromatic systems, revealing a graphitic structure with an interlayer spacing 0.326 nm [33,38]. The 3D character of graphene oxide is reduced as indicated by the disappearance of the narrow XRD reflection at 2θ = 10.8 Aº.…”

Section: Power and Power Densitymentioning

confidence: 84%

“…Graphitic carbon nitride (g-C 3 N 4 ) nanosheets were synthesized by heating 50 g of urea at 500 °C in air for 3 h [33,34].…”

Section: Preparation Of Graphitic Carbon Nitride Nanosheetsmentioning

confidence: 99%

Nanocoating of microbial fuel cell electrodes for enhancing bioelectricity generation from wastewater

Attia

Samer

Mohamed

et al. 2022

Biomass Conv. Bioref.

View full text Add to dashboard Cite

Microbial fuel cells (MFCs) are devices where bacteria generate electrical energy by oxidizing organic matter in wastewater. The implementation of MFCs on a commercial scale is limited due to electrode resistances, which are one of the key factors limiting electricity generation. This study presents a method to maximize the electrical power production from MFCs by coating the electrodes using nanomaterials which leads to prototyping novel electrodes having higher electrical conductivity than common electrodes. The voltage reached 1.234 V directly after operating the MFCs, with nanocoated electrodes, and showed voltage stability till the end of the 140 h interval with a peak value of 1.367 V with a maximum areal power density of 116 mW m−2 and a maximum volumetric power density of 15.6 mW m−3. However, the voltage of the control (without coating) was steadily increased to 0.616 V after 22 h with a maximum areal power density of 23.6 mW m−2 and a maximum volumetric power density of 3.2 mW m−3 then showed voltage stability till the end of the 140 h interval. It was found that the coulombic efficiency of the MFCs where its electrodes are coated with graphitic carbon nitride nanosheets was higher than graphene, carbon nanotubes, and the control in a descending order, respectively. By this method, it is possible to improve the electrical conductivity of the MFCs which results in increasing the generated electrical power by 4.9 times the conventional method.

show abstract

Photocatalytic oxidation of aromatic amines using MnO2@g-C3N4

Abstract: An efficient and direct oxidation of aromatic amines to aromatic azo-compounds has been achieved using a MnO@g- CN catalyst under visible light as a source of energy at room temperature.

Cited by 14 publications

References 15 publications

Graphene-based 2D constructs for enhanced fibroblast support

Graphene-based 2D constructs for enhanced fibroblast support

Enhancing bioelectricity generation from wastewater in microbial fuel cells using carbon nanomaterials

Nanocoating of microbial fuel cell electrodes for enhancing bioelectricity generation from wastewater

Contact Info

Product

Resources

About