A facile approach to the hydrothermal synthesis of graphene

As water pollution is increasing due to industrialization, there is a high demand for easy-processing photocatalytic materials to clean wastewater. Here, the improvement in the photocatalytic dye degradation effect of graphene oxide (GO) surfaces, made of ultra-sonication assisted modified Hummer's method, is demonstrated with increasing alumina (Al2O3) concentration in the range of 4–30 wt. %. Scanning electron microscopy and x-ray diffraction results suggest a gradual increment in crystalline Al2O3 nanoparticles (NPs) by reducing GO, in good agreement with the first-principles calculations. Moreover, x-ray photoelectron spectroscopy reveals the appearance of oxygenated functional groups with increasing Al2O3 concentration, leading to the formation of defect-rich GO as demonstrated by Raman spectroscopy. Ultraviolet-visible spectroscopy further reflects a maximum reduction in the optical bandgap from 1.88 to 1.56 eV up to a concentration of 15 wt. % Al2O3. Interestingly, the methylene blue degradation efficiency of GO under ultraviolet irradiation is also found to be improved from 45% to 64% with 15 wt. % Al2O3, whereas the formation of Al2O3 NPs in the range of 100–300 nm with 30 wt. % Al2O3 is found to be detrimental for photocatalytic activity.

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Unlocking CO ₂ ’s potential: exploring graphene-based catalysts for sustainable chemicals and fuels production

Masimukku,

Lee,

Boddula

et al. 2024

Green Chemistry Letters and Reviews

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A facile approach to the hydrothermal synthesis of graphene

Cited by 3 publications

References 30 publications

Thin films of graphene decorated with NiS2 hybrid sensor for detection of NO2 gas

Thin films of graphene decorated with NiS2 hybrid sensor for detection of NO2 gas

Two-step growth of alumina nanoparticle decorated graphene oxide surfaces: Effect on photocatalytic activity

Unlocking CO ₂ ’s potential: exploring graphene-based catalysts for sustainable chemicals and fuels production

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A facile approach to the hydrothermal synthesis of graphene

Cited by 3 publications

References 30 publications

Thin films of graphene decorated with NiS2 hybrid sensor for detection of NO2 gas

Thin films of graphene decorated with NiS2 hybrid sensor for detection of NO2 gas

Two-step growth of alumina nanoparticle decorated graphene oxide surfaces: Effect on photocatalytic activity

Unlocking CO 2 ’s potential: exploring graphene-based catalysts for sustainable chemicals and fuels production

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Product

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Unlocking CO ₂ ’s potential: exploring graphene-based catalysts for sustainable chemicals and fuels production