A single rapid route for the synthesis of reduced graphene oxide with antibacterial activities

Kellici, Suela; Acord, John; Ball, J.; Reehal, H. S.; Morgan, David; Saha, Basudeb

doi:10.1039/c3ra47573e

Cited by 107 publications

(85 citation statements)

References 25 publications

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“…Notably, in the XRD patterns of Ag-graphene nanocomposites, the characteristic peak (002) of graphitized material typically located at 2θ = 25.32° is not observed. 5 This can be explained by the fact that phases with heavy elements diffract X-rays far more intensely than those with light elements as well as a small amount of material (1-2 mg) was used for the XRD analysis. However, the presence of graphene is confirmed via other techniques such as TEM, XPS and Raman.…”

Section: Resultsmentioning

confidence: 99%

Section: Synthetic Processesmentioning

confidence: 99%

“…5 The as-prepared GO was then used as a precursor for the synthesis of Ag-graphene nanocomposites. [20][21][22] CHFS experiments for synthesis of Ag and Ag-graphene nanocomposites were conducted using a flow reactor designed according to that reported previously, 5 were added to a pre-sonicated (30 min) GO dispersion in DI water. This was pumped (via pump P2) to meet a flow of KOH (0.2 M delivered via P3) at a T-junction (T) from where the mixture then proceeded to meet superheated water (450 °C, 24.1 MPa delivered via P1) inside the counter-current mixer (R in Scheme 2), to give product formation in a continuous manner.…”

Section: Synthetic Processesmentioning

confidence: 99%

“…4 Removing these functional groups by chemical or thermal treatments produces reduced graphene oxide (rGO). 5 However, although these materials have demonstrated some very interesting applications, including antibacterial activity 4,5 with minimal cytotoxicity to animal and human cells, 6 as stand-alone material it does not possess the diversity of properties that is required to allow integration in to a range of potential technological applications including as antimicrobial agents.…”

Section: Introductionmentioning

confidence: 99%

“…13 It is controllable, producing, due to fast nucleation and growth rate, † a range of materials for a diverse spectrum of applications with well-defined and desirable particle properties, including size, composition, and surface area. Indeed, the recent work fosters innovative CHFS approaches in producing high quality 2D graphene (with superior antibacterial properties) 5 adding new functionalities to the 2D substrate via surface functionalization with various nanostructures such as ceria-zirconia, 14 and ceria-lanthanazirconia 15 (both exhibiting enhanced catalytic properties than graphene alone for conversion of CO 2 to value added chemicals). These examples illustrate that CHFS can deliver 2D derivatives with a high degree of control over the composition, shape and size giving significant improvement/enhancement to the aforementioned properties to those currently available.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Calixarene Assisted Rapid Synthesis of Silver-Graphene Nanocomposites with Enhanced Antibacterial Activity

Kellici

Acord

Vaughn

et al. 2016

ACS Appl. Mater. Interfaces

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Demonstrated herein is a single rapid approach employed for synthesis of Aggraphene nanocomposites, with excellent antibacterial properties and low cytotoxicity, by utilizing a Continuous Hydrothermal Flow Synthesis (CHFS) process in combination with phexasulfonic acid calix[6]arene (SCX6) as an effective particle stabilizer. The nanocomposites showed high activity against E. coli (Gram-negative) and S. aureus (Gram-positive) bacteria.The materials were characterized using a range of techniques including transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, UV-Vis spectrophotometry, FT-IR and X-ray powder diffraction (XRD). This rapid, single step synthetic approach not only provides a facile means of enabling and controlling graphene reduction (under alkaline conditions), but also offers an optimal route for homogeneously producing and depositing highly crystalline Ag nanostructures into reduced graphene oxide substrate.

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Section: Resultsmentioning

confidence: 99%

Section: Synthetic Processesmentioning

confidence: 99%

Section: Synthetic Processesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Calixarene Assisted Rapid Synthesis of Silver-Graphene Nanocomposites with Enhanced Antibacterial Activity

Kellici

Acord

Vaughn

et al. 2016

ACS Appl. Mater. Interfaces

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Prospects of Supercritical Fluids in Realizing Graphene‐Based Functional Materials

2016

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Supercritical-fluids science and technology predate all the approaches that are currently established for graphene production by several decades in advanced materials design. However, it has only recently been proposed as a plausible approach for graphene processing. Since then, supercritical fluids have emerged into contention as an alternative to existing technologies because of their scalability and versatility in processing graphene materials, which include composites, aerogels, and foams. Here, an overview is presented of such materials prepared through supercritical fluids from an advanced materials science standpoint, with a discussion on their fundamental properties and technological applications. The benefits of supercritical-fluid processing over conventional liquid-phase processing are presented. The benefits include not only better performances for advanced applications but also environmental issues associated with the synthesis process. Nevertheless, the limitations of supercritical-fluid processing are also stressed, along with challenges that are still faced toward the achievement of the great expectations from graphene materials.

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Supercritical Fluid‐Facilitated Exfoliation and Processing of 2D Materials

et al. 2019

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Since the first intercalation of layered silicates by using supercritical CO2 as a processing medium, considerable efforts have been dedicated to intercalating and exfoliating layered two‐dimensional (2D) materials in various supercritical fluids (SCFs) to yield single‐ and few‐layer nanosheets. Here, recent work in this area is highlighted. Motivating factors for enhancing exfoliation efficiency and product quality in SCFs, mechanisms for exfoliation and dispersion in SCFs, as well as general metrics applied to assess quality and processability of exfoliated 2D materials are critically discussed. Further, advances in formation and application of 2D material–based composites with assistance from SCFs are presented. These discussions address chemical transformations accompanying SCF processing such as doping, covalent surface modification, and heterostructure formation. Promising features, challenges, and routes to expanding SCF processing techniques are described.

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A single rapid route for the synthesis of reduced graphene oxide with antibacterial activities

Cited by 107 publications

References 25 publications

Calixarene Assisted Rapid Synthesis of Silver-Graphene Nanocomposites with Enhanced Antibacterial Activity

Calixarene Assisted Rapid Synthesis of Silver-Graphene Nanocomposites with Enhanced Antibacterial Activity

Prospects of Supercritical Fluids in Realizing Graphene‐Based Functional Materials

Supercritical Fluid‐Facilitated Exfoliation and Processing of 2D Materials

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