Substrate free synthesis of graphene nanoflakes by atmospheric pressure chemical vapour deposition using Ni powder as a catalyst

Sengupta, Joydip; Das, Kaustuv; Nandi, U. N.; Jacob, Chacko

doi:10.1007/s12034-019-1818-0

Cited by 15 publications

(6 citation statements)

References 32 publications

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“…The SAED patterns of the pristine GO show clear and sharp hexagonal spots, confirming the typical structure of a monolayer graphene (Figure 8a). In contrast, the diffused diffraction patterns shown in Figure 8b,c suggest that the graphene sheets are randomly stacked with a lower stacking level, due to the removal of the oxygenated groups, confirming the formation of rGO [40,41].…”

Section: Structural and Morphological Propertiesmentioning

confidence: 89%

Spectral and Structural Properties of High-Quality Reduced Graphene Oxide Produced via a Simple Approach Using Tetraethylenepentamine

et al. 2022

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A simple temperature-assisted solution interaction technique was used to functionalize and reduce graphene oxide (GO) using tetraethylenepentamine (TEPA) with less chemicals, low temperature, and without using other reducing agents. GO nanosheets, produced using a modified Hummers’ method, were functionalized using two different GO:TEPA ratios (1:5 and 1:10). The reduction of GO was evaluated and confirmed by different spectroscopic and microscopic techniques. The FTIR and XPS spectra revealed that most of the oxygenated groups of GO were reduced. The emergence of amide groups in the XPS survey of the rGO-TEPA samples confirmed the successful reaction of TEPA with the carboxyl groups on the edges of GO. The replacement of the oxygenated groups increased the carbon/oxygen (C/O) ratio of GO by approximately 60%, suggesting a good reduction degree. It was found that the I2D/ID+D′ ratio and the relative intensity of the D″ band clearly increased after the reduction reaction, suggesting that these bands are good estimators for the reduction degree of GO. The morphological structure of GO was also affected by the reaction with TEPA, which was confirmed by SEM and TEM images. The TEM images showed that the transparent GO sheets became denser and opaque after functionalization with TEPA, indicating an increase in the stacking level of the GO sheets. This was further confirmed by the XRD analysis, which showed a clear decrease in the d-spacing, caused by the removal of oxygenated groups during the reduction reaction.

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Section: Structural and Morphological Propertiesmentioning

confidence: 89%

Spectral and Structural Properties of High-Quality Reduced Graphene Oxide Produced via a Simple Approach Using Tetraethylenepentamine

et al. 2022

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“…It reduces the dependence on non-renewable carbon sources, minimizes waste generation, and diminishes the environmental footprint typically associated with traditional graphene production methods, like CVD utilizing hydrocarbon gases. 15 An additional eco-friendly advantage lies in the biodegradability of residual biomass. Any unused or byproduct biomass naturally degrades, minimizing the environmental impact and waste accumulation.…”

Section: Green Graphene: Synthesis and Applicability In Eco-sustainab...mentioning

confidence: 99%

Point-of-care devices engaging green graphene: an eco-conscious and sustainable paradigm

Sengupta,

Hussain

2024

Nanoscale

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“…Biomass conversion for green graphene synthesis inherently embraces eco-sustainability. It reduces dependence on non-renewable carbon sources, minimizes waste generation, and diminishes the environmental footprint typically associated with traditional graphene production methods, like CVD utilizing hydrocarbon gases 15 . An additional eco-friendly advantage lies in the biodegradability of residual biomass.…”

Section: Biomass Conversionmentioning

confidence: 99%

Point of Care Devices Engaging Green Graphene: An Eco-conscious and Sustainable Paradigm

Sengupta,

Hussain

2024

Preprint

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The healthcare landscape has experienced a profound and irreversible transformation, primarily driven by the emergence of nanomaterial assisted point-of-care (POC) devices. Inclusion of nanomaterials in POC devices have revolutionized healthcare by enabling rapid, on-site diagnostics with minimal infrastructure requirements. Among the materials poised to lead this technological revolution, green graphene emerges as a compelling contender. It possesses a unique combination of exceptional material properties and environmentally conscious attributes. These attributes include its substantial surface area, unparalleled electrical conductivity, and inherent biocompatibility. This article embarks on an exploration of POC devices incorporating green graphene. It meticulously dissects the intricacies of their design, performance characteristics, and diverse applications. Throughout the exposition, the transformative impact of green graphene on the advancement of POC diagnostics takes centre stage. It underscores the material's potential to drive sustainable and effective healthcare solutions, marking a significant milestone in the evolution of healthcare technology.

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Substrate free synthesis of graphene nanoflakes by atmospheric pressure chemical vapour deposition using Ni powder as a catalyst

Cited by 15 publications

References 32 publications

Spectral and Structural Properties of High-Quality Reduced Graphene Oxide Produced via a Simple Approach Using Tetraethylenepentamine

Spectral and Structural Properties of High-Quality Reduced Graphene Oxide Produced via a Simple Approach Using Tetraethylenepentamine

Point-of-care devices engaging green graphene: an eco-conscious and sustainable paradigm

Point of Care Devices Engaging Green Graphene: An Eco-conscious and Sustainable Paradigm

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