In Vitro Hyperthermia Evaluation of Electrospun Polymer Composite Fibers Loaded with Reduced Graphene Oxide

Electrospun meshes (EM) composed of natural and synthetic polymers with randomly or aligned fibers orientations containing 0.5% or 1% of thermally reduced graphene oxide (TrGO) were prepared by electrospinning (ES), and their hyperthermia properties were evaluated. EM loaded with and without TrGO were irradiated using near infrared radiation (NIR) at 808 nm by varying the distance and electric potential recorded at 30 s. Morphological, spectroscopic, and thermal aspects of EM samples were analyzed by using SEM-EDS, Raman and X-ray photoelectron (XPS) spectroscopies, X-ray diffraction (XRD), and NIR radiation response. We found that the composite EM made of polyvinyl alcohol (PVA), natural rubber (NR), and arabic gum (AG) containing TrGO showed improved hyperthermia properties compared to EM without TrGO, reaching an average temperature range of 42–52 °C. We also found that the distribution of TrGO in the EM depends on the orientation of the fibers. These results allow infering that EM loaded with TrGO as a NIR-active thermal inducer could be an excellent candidate for hyperthermia applications in photothermal therapy.

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Facile one pot microbe-mediated in situ synthesis and antibacterial activity of reduced graphene oxide-silver nanocomposite

Nanotechnology ◽

10.1088/1361-6528/ac4521 ◽

2021 ◽

Author(s):

Ashwini Patil

Keyword(s):

Antibacterial Activity ◽

Graphene Oxide ◽

Zeta Potential ◽

Reduced Graphene Oxide ◽

In Vitro Dissolution ◽

Size Analysis ◽

X Ray ◽

Reduced Graphene

Abstract The present research deals with the development of a novel bioinspired in situ fabrication of reduced graphene oxide (rGO)-silver nanoparticle (AgNPs) nanocomposite (rGO@AgNCs) using microbes namely Pseudomonas aeruginosa (PA) and Staphylococcus aureus (SA). The fabricated rGO@AgNCs were characterized using Ultraviolet-visible (UV) spectroscopy, Fourier-transform infrared spectroscopy (FTIR), particle size analysis, polydispersity index (PDI), zeta potential analysis, energy dispersive X-ray analysis (EDAX), Raman spectroscopy, powder X-ray diffraction (PXRD), high-resolution transmission electron microscopy (HR-TEM) analysis, etc. Furthermore, the rGO@AgNCs-PA and rGO@AgNCs-SA interaction with serum protein, pH stability study, and in vitro dissolution of AgNPs were also performed. The research findings of the proposed study demonstrated the simultaneous reduction of graphene oxide (GO) and AgNPs and the formation of rGO@AgNCs in the presence of microbes. The in vitro dissolution studies of rGO@AgNCs composites showed better AgNPs dissolution with controlled release and offered remarkable matrix integrity throughout the dissolution period. The size and stability of rGO@AgNCs-PA and rGO@AgNCs-SA had no significant changes at physiological pH 7.4. A minimal decrease in the zeta potential of rGO@AgNCs was observed, which may be due to the weak interaction of nanocomposites and albumin. The antibacterial application of the synthesized nanocomposite was evaluated against a pathogenic mastitis-forming bacterium. The obtained results suggested an admirable antibacterial activity of synthesized nanocomposites against the tested microbes. This knowledge will assist the scientific fraternity in designing novel antibacterial agents with enhanced antibacterial activity against various veterinary pathogens in near future.

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Neurotensin-Conjugated Reduced Graphene Oxide with Multi-Stage Near-Infrared-Triggered Synergic Targeted Neuron Gene Transfection In Vitro and In Vivo for Neurodegenerative Disease Therapy

Advanced Healthcare Materials ◽

10.1002/adhm.201600647 ◽

2016 ◽

Vol 5 (23) ◽

pp. 3016-3026 ◽

Cited By ~ 18

Author(s):

Tsung-Ying Hsieh ◽

Wei-Chen Huang ◽

Yi-Da Kang ◽

Chao-Yi Chu ◽

Wen-Lin Liao ◽

...

Keyword(s):

Graphene Oxide ◽

Neurodegenerative Disease ◽

Reduced Graphene Oxide ◽

Near Infrared ◽

Gene Transfection ◽

Multi Stage ◽

Disease Therapy ◽

Reduced Graphene

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Reduced Graphene Oxide–Epoxy Grafted Poly(Styrene-Co-Acrylate) Composites for Corrosion Protection of Mild Steel

Coatings ◽

10.3390/coatings9100666 ◽

2019 ◽

Vol 9 (10) ◽

pp. 666

Author(s):

Xinchuan Fan ◽

Yue Hu ◽

Yijun Zhang ◽

Jiachen Lu ◽

Xiaofeng Chen ◽

...

Keyword(s):

Electron Microscopy ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Photoelectron Spectroscopy ◽

X Ray Diffraction ◽

Corrosion Properties ◽

X Ray ◽

Transmission Electron ◽

Reduced Graphene ◽

Scanning Electron

Reduced graphene oxide–epoxy grafted poly(styrene-co-acrylate) composites (GESA) were prepared by anchoring different amount of epoxy modified poly(styrene-co-acrylate) (EPSA) onto reduced graphene oxide (rGO) sheets through π–π electrostatic attraction. The GESA composites were characterized by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The anti-corrosion properties of rGO/EPSA composites were evaluated by electro-chemical impedance spectroscopy (EIS) in hydroxyl-polyacrylate coating, and the results revealed that the corrosion rate was decreased from 3.509 × 10−1 to 1.394 × 10−6 mm/a.

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Study on Magnetic Properties of Na-Doped rGO Prepared from Coconut Shells

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.855.160 ◽

2020 ◽

Vol 855 ◽

pp. 160-165

Author(s):

Deril Ristiani ◽

Niken Sylvia Puspitasari ◽

Retno Asih ◽

Fahmi Astuti ◽

Malik Anjelh Baqiya ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Mixing Process ◽

X Ray Diffraction ◽

X Ray ◽

Reduced Graphene ◽

Naoh Solution ◽

Na Ions ◽

Diffraction Peaks ◽

Coconut Shells

Na-doped reduced graphene oxide (Na-rGO) was prepared by wet mixing process of the reduced graphene oxide (rGO) in NaOH solution. The results showed that the rGO doped with Na ions can increase its magnetization approximately 2 times greater than that in rGO without doping. Saturation magnetization (Ms) for rGO and Na-rGO samples are 0.017 emu/g and 0.037 emu/g, respectively. The increasing value of magnetization is suggested to be due to defect presented in the Na-rGO samples. Both samples, rGO and Na-rGO, have the similar XRD (X-ray Diffraction) spectra that is marked by two characteristic diffraction peaks of rGO, which are associated with [002] and [10] planes, followed by the increasing inter-planar distance in Na-rGO samples which might be due to Na ions intercalation into rGO sheets, confirmed by the energy-dispersive X-ray (EDX) result revealing the presence of Na atoms in rGO.

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X-ray diffraction investigations of nanostructured ZnO coated with reduced graphene oxide.

Journal of Physics Conference Series ◽

10.1088/1742-6596/1292/1/012011 ◽

2019 ◽

Vol 1292 ◽

pp. 012011 ◽

Cited By ~ 1

Author(s):

I Boukhoubza ◽

M Khenfouch ◽

M Achehboune ◽

B M Mothudi ◽

I Zorkani ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

X Ray Diffraction ◽

X Ray ◽

Reduced Graphene

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The effective removal of chloramphenicol by the reduced graphene oxide anchored nZVI/aluminum hybrid under neutral conditions

E3S Web of Conferences ◽

10.1051/e3sconf/202125202054 ◽

2021 ◽

Vol 252 ◽

pp. 02054

Author(s):

Yujia Yang ◽

Lejin Xu

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

X Ray Diffraction ◽

Uv Spectrum ◽

X Ray ◽

Neutral Ph ◽

Effective Removal ◽

Reduced Graphene ◽

Physicochemical Features ◽

Neutral Conditions

In this study, a reduced graphene oxide anchored nZVI/Al hybrid (rGO@nZVI/Al) was synthesized for effective degradation of chloramphenicol (CAP) at neutral pH just through the activation of dissolved oxygen (DO). The morphology and physicochemical features of rGO@nZVI/Al were characterized with the field emission scanning electron microscopy combined with energy dispersive spectroscopy (SEM-EDS), Brunauer-Emmet-Teller surface area analysis (BET) and X-ray diffraction (XRD). The CAP removal by rGO@nZVI/Al was conducted at neutral pH, and the performance of rGO@nZVI/Al for DO activation was also estimated in view of the effect of various systems. The reusability of rGO@nZVI/Al was investigated through the cycle tests and the variation of UV spectrum for further application.

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Photocatalytic Degradation of Organic Pollutant using Reduced Graphene Oxide

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.d1165.1284s219 ◽

2019 ◽

Vol 8 (4S2) ◽

pp. 870-872

Keyword(s):

Electron Microscopy ◽

Graphene Oxide ◽

Photocatalytic Degradation ◽

Reduced Graphene Oxide ◽

Organic Pollutant ◽

X Ray Diffraction ◽

X Ray ◽

Reduced Graphene ◽

Vis Spectroscopy ◽

Scaning Electron Microscopy

A simple eco friendly preparation of reduced graphene oxide from graphene oxide using strawberry extract is reported. As prepared reduced graphene oxide were characterized by X-Ray Diffraction, UV-Vis spectroscopy, Scaning electron microscopy and degradation performane of MB. The reduced graphene oxide was effectively degradation of MB.

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The Magnetization of a Composite Based on Reduced Graphene Oxide and Polystyrene

Nanomaterials ◽

10.3390/nano11020403 ◽

2021 ◽

Vol 11 (2) ◽

pp. 403

Author(s):

Alexander N. Ionov ◽

Mikhail P. Volkov ◽

Marianna N. Nikolaeva ◽

Ruslan Y. Smyslov ◽

Alexander N. Bugrov

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Structural Defects ◽

X Ray Diffraction ◽

Covalent Bonds ◽

X Ray ◽

Electrical And Magnetic Properties ◽

Inorganic Composites ◽

Reduced Graphene ◽

Type Ii Superconductivity

The use of reduced graphene oxide (r-GO) is a promising way of fabricating organic–inorganic composites with unique electrical and magnetic properties. In our work, polystyrene/r-GO composites were synthesized, in which both the components are linked together by covalent bonds. The r-GO used differs from the graphene obtained from graphite through mechanical exfoliation using the ‘scotch tape’ by presenting many structural defects. Binding in the composite structure between the components was confirmed by infrared spectroscopy. Elemental analysis was carried out by energy dispersive X-ray spectroscopy. Scanning electron microscopy, X-ray diffraction, and Raman spectroscopy were used to monitor the 2D-order in exfoliated r-GO galleries. Using a vibrating-sample magnetometer, we have shown that the composite magnetization loops demonstrate type-II superconductivity up to room temperature due to r-GO flakes. We believe that a strain field in the r-GO flakes covalently binding to a polymeric matrix is responsible for the superconductivity phenomena.

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ADSORPTION OF URANIUM FROM AQUEOUS SOLUTION BY Cu0.5Ni0.5Fe2O4 – REDUCED GRAPHENE OXIDE NANOCOMPOSITES

Vietnam Journal of Science and Technology ◽

10.15625/2525-2518/54/5a/12056 ◽

2018 ◽

Vol 54 (5A) ◽

pp. 9

Author(s):

Tran Quang Dat

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Ph Effect ◽

Maximum Adsorption Capacity ◽

X Ray Diffraction ◽

X Ray ◽

Reduced Graphene ◽

20 Nm ◽

Oxide Composites ◽

Efficient Adsorbent

Cu0.5Ni0.5Fe2O4 – reduced graphene oxide composites (CNF-rGO) as an efficient adsorbent for the adsorption of uranium (VI) have been synthesized by a two-steps methods. The structures and the physicochemical properties of adsorbents are characterized by Scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy (RAMAN) and Vibrating sample magnetometer (VSM) measurement. It was found that rGO were exfoliated and decorated homogeneously with CNF nanoparticles having diameters of 20 nm. The saturated magnetization (Ms) value was estimated to be 60 emu/g, remanences (Mr) and coercive forces (Hc) near to zero, indicating that obtained material is superparamagnetic. The pH effect, contact time and adsorption isotherms were examined in batch experiments. The adsorption isotherm agreed well with the Langmuir model, having a maximum adsorption capacity of 256 mg/g, at pH = 6, T = 298 K.

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