Effective disposal of methylene blue using green immobilized silver nanoparticles on graphene oxide and reduced graphene oxide sheets through one-pot synthesis

Aboelfetoh, Eman F.; Gemeay, Ali H.; El-Sharkawy, Rehab G.

doi:10.1007/s10661-020-08278-2

Cited by 50 publications

(20 citation statements)

References 69 publications

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“…The reusability of rGO was examined by four successive adsorption/desorption cycles according to the method developed by Aboelfetoh et al [70] (Figure 17). The desorption of MB from spent rGO was conducted by separating rGO by centrifugation, followed by sequential washing with 0.1 M NaOH (aq), diluted ethanol (aq), and distilled water.…”

Section: Recycling and Reuse Studymentioning

confidence: 99%

Lemon Juice Assisted Green Synthesis of Reduced Graphene Oxide and Its Application for Adsorption of Methylene Blue

Mahiuddin

Ochiai

2021

Technologies

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Sustainable synthesis of reduced graphene oxide (rGO) is of crucial significance within the development of carbon nanomaterials. In this study, a green and eco-friendly strategy for the synthesis of rGO using lemon juice as the reducing agent for graphene oxide (GO) without using toxic and harmful chemicals was demonstrated. The reduction with lemon juice effectively eliminated the oxygen-containing functionalities of GO and regenerated the conjugated systems as confirmed by the UV-vis and FTIR spectroscopic and X-ray diffraction analyses. Microscopic evaluation showed the successful manufacturing of exfoliated and separated few layers of nano-sheets of rGO. The application of the resultant rGO as an adsorbent for organic pollutants was investigated using methylene blue (MB) as a model. The adsorption kinetics of MB on rGO is best matched with the pseudo-second-ordered kinetic model and the Langmuir model with a high adsorption capacity of 132.2 mg/g. The rGO exhibited good reusability with a removal efficiency of 80.4% in the fourth cycle. This green method provides a new prospect for the large-scale production of rGO in a cost-effective and safe manner.

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Section: Recycling and Reuse Studymentioning

confidence: 99%

Lemon Juice Assisted Green Synthesis of Reduced Graphene Oxide and Its Application for Adsorption of Methylene Blue

Mahiuddin

Ochiai

2021

Technologies

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“…Further interaction between the aromatic rings of the dye with π electrons of g‐C 3 N 4 through π–π electron coupling helps in achieving high efficiency of dye degradation. [ 29 ] It shows that the g‐C 3 N 4 /CuSe heterostructure significantly enhanced the photocatalytic efficiency for MB dye removal under sunlight. To calculate the percentage of dye degradation, aliquots were taken at regular interval of time and were analyzed in a UV–vis spectrophotometer to measure the absorbance.…”

Section: Resultsmentioning

confidence: 99%

Band Alignment at Heterointerface with Rapid Charge Transfer Supporting Excellent Photocatalytic Degradation of Methylene Blue under Sunlight

Talukdar

Behera

Jana

et al. 2022

Adv Materials Inter

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Engineering 2D heterostructure using proximitized interfaces is an effective approach to attain high efficiency photocatalytic performance toward dye degradation. Strong interfacial interaction and abundant coupled interfaces and 2D/2D face‐to‐face contact heterostructure facilitate efficient charge separation contributing to high photocatalytic activity. In this aspect, for the first time the authors have analyzed the band alignment of the 2D/2D heterojunction, using Perdew–Burke–Ernzerhof semilocal meta‐generalized‐gradient approximation case and Heyd–Scuseria–Ernzerhof hybrid functional approach in density functional theory stimulation. Close proximity of CuSe nanoflakes with carbon nitride sheets facilitate electron transfer process leading to more proficient photocatalytic degradation, which is confirmed from the inverse participation ratio of individual atoms on the proximitized hetero interface and electrostatic potential line‐ups. The results demonstrate that this 2D/2D heterostructure has desired type‐II band alignment, which is facilitating rapid separation of photogenerated carriers in support of experimental findings. The face‐to‐face contact heterostructure with effective separation and low recombination rate of photogenerated electron–hole pairs helps in complete degradation of dye within 15 min. Further, the brilliance in photocatalytic performance of the developed type II heterostructure correlating with experimental results has introduced this system as a new class of material for wastewater treatment.

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“…The peak at 2θ = 10.13˚ shows that graphite was oxidized well and GO nanosheets were synthesized successfully. The main peak in the XRD pattern of GO at 2θ = 10.13˚ is disappeared in the XRD pattern of rGO-Ag nanohybrids and this indicates that ascorbic acid has reduced oxygen-containing groups of GO nanosheets to a high extent [29]. Apart from that, the higher intensity of the characteristic peaks related to…”

Section: Xrdmentioning

confidence: 96%

Silver Nanoparticles Decorated Graphene Filled PVDF/PMMA Blends with Advanced electrical, mechanical, and thermal properties

Khorramshokouh¹,

Ramezani²,

Sahami³

et al. 2022

Preprint

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In this paper, silver nanoparticles decorated reduced graphene oxide (rGO-Ag) nanohybrids were prepared using an environmentally-friendly approach and incorporated as reinforcement in poly(vinylidene fluoride)-poly(methyl methacrylate) blends via melt mixing process. The effect of rGO-Ag nanohybrids was studied on various properties of the blends using different characterization methods. Fourier transform infrared (FTIR), X-ray diffraction (XRD), and transmission electron microscopy (TEM) results confirmed the successful synthesis of rGO-Ag nanohybrids. The mechanical, electrical, and thermal properties of the resulting rGO-Ag filled nanocomposites were investigated using tensile, thermogravimetric analysis (TGA), and impedance spectroscopy methods. The Halpin-Tsai model also adjusted for PVDF/PMMA/rGO-Ag composites and the results confirmed that this model works well for the prediction of the tensile modulus. Investigation of mechanical properties demonstrated that the presence of rGO-Ag nanohybrids increased the yield strength and elastic modulus of the samples with the addition of only 1 wt % to the chosen blend sample. Impedance spectroscopy test results showed that the addition of rGO-Ag nanohybrids to PVDF/PMMA blend can effectively enhance the conductivity of the blends. Finally, TGA results demonstrated that the addition of rGO-Ag nanohybrids affected the thermal behavior of the samples and increased the thermal stability and degradation temperature of the resulting nanocomposites compared to the base PVDF/PMMA blend.

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Effective disposal of methylene blue using green immobilized silver nanoparticles on graphene oxide and reduced graphene oxide sheets through one-pot synthesis

Cited by 50 publications

References 69 publications

Lemon Juice Assisted Green Synthesis of Reduced Graphene Oxide and Its Application for Adsorption of Methylene Blue

Lemon Juice Assisted Green Synthesis of Reduced Graphene Oxide and Its Application for Adsorption of Methylene Blue

Band Alignment at Heterointerface with Rapid Charge Transfer Supporting Excellent Photocatalytic Degradation of Methylene Blue under Sunlight

Silver Nanoparticles Decorated Graphene Filled PVDF/PMMA Blends with Advanced electrical, mechanical, and thermal properties

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