Graphene/inorganic nanocomposites: Evolving photocatalysts for solar energy conversion for environmental remediation

Khan, Mujeeb; Assal, Mohamed E.; Tahir, Muhammad Nawaz; Khan, Majad; Ashraf, Muhammad; Hatshan, Mohammad Rafe; Khan, Muhammad Altaf; Varala, Ravi; Badawi, Nujud M.; Adil, Syed Farooq

doi:10.1016/j.jscs.2022.101544

Cited by 49 publications

(11 citation statements)

References 323 publications

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“…Moreover, 77.9 % of MB dye was degraded after sunlight exposure time up to 240 min in the presence of 20 wt.% Gr/Mg0.33Ni0.33Co0.33La0.01Fe1.99O4 nanocomposites (NCs). This might be ascribed to the effective charge transfer encouraged by Gr addition, which enhances the separation of the photogenerated electron-hole pair [45]. Therefore, the combination of NPs with Gr significantly enhanced the photocatalytic activity of Mg0.33Ni0.33Co0.33La0.01Fe1.99O4 NPs in the MB degradation, and 20 wt.% of Gr is the ideal Gr content.…”

Section: Influence Of Graphene Additionmentioning

confidence: 98%

Influence of Lanthanum Doping on the Photocatalytic and Antibacterial Capacities of Mg0.33Ni0.33Co0.33Fe2O4 Nanoparticles

et al. 2023

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The increase in environmental pollution, especially water pollution, has intensified the requirement for new strategies for the treatment of water sources. Furthermore, the improved properties of nano-ferrites permit their usage in wastewater treatment. In this regard, novel Mg0.33Ni0.33Co0.33LaxFe2−xO4 nanoparticles (NPs), where 0.00≤x≤0.08, were synthesized to test their photocatalytic, antibacterial and antibiofilm activities. The structural and optical properties of the prepared NPs were investigated by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), UV-Vis spectroscopy and photoluminescence (PL) analysis. As La content increases, the bandgap energy increases, whereas the particle size decreases. The photocatalytic activity of the prepared NPs is evaluated by the degradation of methylene blue (MB) dye under sunlight irradiation. Superior activity is exhibited by Mg0.33Ni0.33Co0.33La0.01Fe1.99O4 NPs. The influence of catalyst dosage, pH, temperature and addition of graphene (Gr) on the photodegradation reaction was studied. Increasing the pH and temperature improved the rate of the photodegradation reaction. The antibacterial and antibiofilm activities of the NPs were assessed against Escherichia coli, Leclercia adecarboxylata, Staphylococcus aureus and Enterococcus faecium. Mg0.33Ni0.33Co0.33Fe2O4 NPs inhibited bacterial growth. They had bacteriostatic activity on all isolates, with a greater effect on Gram-positive bacteria. All tested nano-ferrites had significant antibiofilm activities against some biofilms.

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Section: Influence Of Graphene Additionmentioning

confidence: 98%

Influence of Lanthanum Doping on the Photocatalytic and Antibacterial Capacities of Mg0.33Ni0.33Co0.33Fe2O4 Nanoparticles

et al. 2023

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“…Despite their high photostability, [183] limitations of inorganic nanoparticles have motivated researchers to examine alternatives. Limitations include (i) inferior colloidal stability in common organic reaction solvents, [184] (ii) high visible light absorption that significantly reduces scalability, (iii) possible electron-hole recombination, which decreases catalyst efficiency, [177] and (iv) a highly material-specific band gap which limits opportunities to modify catalyst selectivity.…”

Section: Inorganic Nanoparticlesmentioning

confidence: 99%

Heterogeneous Photocatalysts for Light‐Mediated Reversible Deactivation Radical Polymerization

et al. 2023

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Heterogeneous photocatalysis combines the benefits of light‐mediated chemistry with that of a catalytic platform that facilitates re‐use of (often expensive) photocatalysts. This provides significant opportunities towards more economical, sustainable, safe, and user‐friendly chemical syntheses of both small and macromolecular compounds. This contribution outlines recent developments in the design of heterogenous photocatalysts and their use to mediate polymerizations. We outline four classes of heterogeneous photocatalysts in detail: nanoparticles, conjugated and non‐conjugated polymer networks, metal‐organic frameworks (MOFs), and functionalized solid supports.

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“…(1) Tensile test results reveal that the treatment with 17 layers of graphene solution improved the mechanical properties of the elastic cotton. The presence of graphene may have increased the bonding strength between pure cotton and conductive cotton, leading to an improvement in the strength of the thread [51,52].…”

Section: Mechanical Properties Of the Cotton Sample: The Tensile Testmentioning

confidence: 99%

Design and Characterization of Electroconductive Graphene-Coated Cotton Fabric for Wearable Electronics

Badawi,

Batoo,

Hussain

et al. 2023

Coatings

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Efficient energy storage is becoming a serious niche area nowadays due to exponential growth in energy consumption. Different approaches have been developed and implemented to improve the performance of the devices, in which improving conductivity is a major issue. In the present work, cotton fabric was converted into a conductive material by incorporating graphene, using the Layer-by-Layer (LBL) method, followed by heating at 100 °C. The electrical conductivity of the cotton using different concentrations of graphene was studied. The graphene-coated cotton, at the 17th layer, with a concentration of 168.36 wt.% resulted in a surface resistance of 0.644 Ω/sq and retained the maximum resistance even after two months. Scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy analysis (EDX) were employed to comprehend the surface morphology and elemental compositions. Fourier transform infrared (FTIR) spectroscopy, UV-vis absorption, and X-ray diffraction (XRD) were used to determine the structural analysis, which revealed a good dispersion of graphene in the cotton samples obtained through dimethyl sulfoxide (DMSO) doping, which reduced the ripple of the cotton. The cotton fabric treated with graphene was thermally stable, as shown through thermal analysis. From the results obtained, it is evident that graphene-treated cotton fabric materials show tremendous potential for use in smart textiles and also as protective clothing.

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Graphene/inorganic nanocomposites: Evolving photocatalysts for solar energy conversion for environmental remediation

Cited by 49 publications

References 323 publications

Influence of Lanthanum Doping on the Photocatalytic and Antibacterial Capacities of Mg0.33Ni0.33Co0.33Fe2O4 Nanoparticles

Influence of Lanthanum Doping on the Photocatalytic and Antibacterial Capacities of Mg0.33Ni0.33Co0.33Fe2O4 Nanoparticles

Heterogeneous Photocatalysts for Light‐Mediated Reversible Deactivation Radical Polymerization

Design and Characterization of Electroconductive Graphene-Coated Cotton Fabric for Wearable Electronics

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