Preparation of highly water dispersible functional graphene/silver nanocomposite for the detection of melamine

Kumar, Sanjay; Huang, N. M.; Lim, Hong Ngee; Zainy, Mazlinda; Harrison, I. R.; Chia, Chin Hua

doi:10.1016/j.snb.2013.02.045

Cited by 76 publications

(30 citation statements)

References 46 publications

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“…The peaks corresponding to the 2θ values of 38°, 44.47°, 64.5° and 77.6° were assigned to the (1 1 1), (2 0 0), (2 2 0) and (3 1 1) planes of silver with a face‐centred cubic (fcc) structure, respectively . The broad nature of diffraction peaks of Ag indicated that the silver is in nano form . Therefore, the XRD spectra strongly indicated the formation of BRG−Ag nanocomposite in our betel leaf extract reduction method.…”

Section: Resultsmentioning

confidence: 84%

“…The D band can be attributed to the defects at edges and appeared at 1350 cm −1 , the G band arises from the zone centre E 2g mode and appeared at 1600 cm −1 . The prominent D band was ascribed to the presence of more number of sp 3 carbons from the phytochemicals of BLE . The intensity ratio (I D /I G ) of the D and G bands indicated the disorder ascribed to the vacancies, edge defects and amorphous nature of carbon species.…”

Section: Resultsmentioning

confidence: 96%

“…The XRD spectra of GO showed a sharp peak at a 2θ value of 11° which disappeared after reduction and the XRD peaks of BRG−Ag nanocomposite appeared at 27°, 38°, 44.47°, 64.5° and 77.6°. The peak at a 2θ value of 27° is attributed to the BRG sheets . The peaks corresponding to the 2θ values of 38°, 44.47°, 64.5° and 77.6° were assigned to the (1 1 1), (2 0 0), (2 2 0) and (3 1 1) planes of silver with a face‐centred cubic (fcc) structure, respectively .…”

Section: Resultsmentioning

confidence: 99%

“…The peak at a 2θ value of 27° is attributed to the BRG sheets . The peaks corresponding to the 2θ values of 38°, 44.47°, 64.5° and 77.6° were assigned to the (1 1 1), (2 0 0), (2 2 0) and (3 1 1) planes of silver with a face‐centred cubic (fcc) structure, respectively . The broad nature of diffraction peaks of Ag indicated that the silver is in nano form .…”

Section: Resultsmentioning

confidence: 99%

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A Facile Green Reduction for Graphene‐Silver Nanocomposite Using Betel Leaf Extract for the Photocatalytic Degradation of Water Pollutants

2017

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Green leaves are utilized in the green synthesis of various nanomaterials as these are rich sources of various biomolecules useful to control the growth of nanoparticles and as reducing agents. In this report, the in situ synthesis of a nanocomposite of silver decorated on reduced graphene oxide sheets using betel leaf extract as stabilizing and reducing agent is presented. The formation of nanocomposite is confirmed by Ultraviolet‐Visible, Fourier Transform Infrared and Raman spectroscopic techniques. The X‐Ray Diffraction results revealed the Face Centered Cubic structure of silver nanoparticles (Ag NPs) with a particle size of 28 nm. The sheet structure of reduced graphene oxide and uniformly distributed Ag NPs on these sheets is confirmed by High Resolution Scanning Electron Microscope analysis. The obtained nanocomposite exhibited good photocatalytic efficiency (95% in 2 h) against a model pollutant, methylene blue in sun light.

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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A Facile Green Reduction for Graphene‐Silver Nanocomposite Using Betel Leaf Extract for the Photocatalytic Degradation of Water Pollutants

2017

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“…In the past few years, significant efforts have been directed toward the preparation of graphene-based nanocomposites such as graphene/Bi 2 O 3 [15], graphene/ SnO 2 [16], graphene/gold [17], graphene/Silver [18], graphene/Mn 3 O 4 [19], Ag 3 VO 4 /TiO 2 /graphene [20], TiO 2 /graphene [21,22], ZnO/graphene [23,24], graphene/cobalt [25], etc. The unique properties of these materials have been demonstrated for a variety of catalysts, super capacitors and fuel cell batteries.…”

Section: Introductionmentioning

confidence: 99%

Phase Transformation of RGO/SiO2 Nanocomposites Prepared by the Sol-Gel Technique

Shalaby¹,

Staneva

Aleksandrov

et al. 2014

Nanoscience Advances in CBRN Agents Detection, Information and Energy Security

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In a previous paper (Shalaby A, Yaneva V, Staneva A, Aleksandrov L, Iordanova R, Dimitriev Y, Nanoscience & nanotechnology -nanostructured materials application and innovation transfer (14), ISSN 1313-8995, 2014) we studied reduced graphene oxide (RGO)/SiO 2 composite material by adding a small amount of RGO to silica in order to avoid the aggregation process and to solve the problems connected with the exfoliation and distribution of the sheets inside the composites. But from a practical point we needed to study the effect of high amounts of RGO on the composites at different temperatures. The purpose of this investigation is to study the effect of RGO on phase transformations of the composites heated at 200, 400 and 800 C. The sol-Gel method was used to obtain the RGO/SiO 2 composite by mixing high amounts of RGO with tetraethyl orthosilicate (TEOS). Data are presented for the transformation of the nanocomposites with increasing temperature in air atmosphere. RGO nanosheets were prepared by chemical exfoliation of purified natural graphite using the Hummers and Offeman method (Hummers WS, Offeman RE, J Am Chem Soc 80:1339, 1958) to obtain graphite oxide. Then the material was exfoliated to reduced graphene nanosheets by ultrasonication and reduction process using sodium borohydride (NaBH 4 ). Characterization of the material was performed by X-ray powder diffraction (XRD), A. Shalaby

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Self‐Organized 3D Graphene as a Robust Sensing Platform

Bourquard

Donnet

Garrelie

et al. 2019

Handbook of Graphene

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Preparation of highly water dispersible functional graphene/silver nanocomposite for the detection of melamine

Cited by 76 publications

References 46 publications

A Facile Green Reduction for Graphene‐Silver Nanocomposite Using Betel Leaf Extract for the Photocatalytic Degradation of Water Pollutants

A Facile Green Reduction for Graphene‐Silver Nanocomposite Using Betel Leaf Extract for the Photocatalytic Degradation of Water Pollutants

Phase Transformation of RGO/SiO2 Nanocomposites Prepared by the Sol-Gel Technique

Self‐Organized 3D Graphene as a Robust Sensing Platform

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