scholarly journals Novel Structures of Functionalized Graphene Oxide with Hydrazide: Characterization and Bioevaluation of Antimicrobial and Cytocompatibility Features

Coatings ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 45
Author(s):  
Irina Zarafu ◽  
Carmen Limban ◽  
Cristiana Radulescu ◽  
Ioana Daniela Dulama ◽  
Diana Camelia Nuta ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Functional Groups ◽  
Structural Defects ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Cytotoxicity Activity ◽  
Disorder Degree ◽  
The Mean ◽  
Novel Structures ◽  
Scanning Electron

Graphite was oxidized to graphene oxide and activated by thionyl chloride, for further covalently linking three hydrazides with potential biological activity. The obtained materials were characterized by scanning electron microscopy with energy dispersive spectroscopy, Fourier-transform infrared and Raman spectroscopies. The presence of various functional groups specific to graphene oxide (GO) functionalized with different hydrazides was confirmed by spectral data. The ratio between D- and G-bands, observed in Raman spectra, allowed for an evaluation of the disorder degree and the mean crystallite size of the samples. The micrographs highlighted that the samples lead to the occurrence of disorders, probably caused by the sp3 carbons, the formation of oxygen-containing functional groups in the basal planes, and by various structural defects. The new graphene oxide–hydrazide derivatives were tested for their antimicrobial and cytotoxicity activity. Their antimicrobial activity against planktonic and biofilm-embedded cells was inferior to that of free hydrazides, except for GO-3 against planktonic Escherichia coli and GO-2 against Pseudomonas aeruginosa biofilm, demonstrating that further optimization is needed to be able to exploit the huge potential of GO for developing potent antimicrobials.

High effective enrichment of U(vi) from aqueous solutions on versatile crystalline carbohydrate polymer-functionalized graphene oxide

2021 ◽  
Vol 50 (39) ◽  
pp. 14009-14017
Author(s):  
Hai Wang ◽  
Renrong Liu ◽  
Huifang Wang ◽  
Baowei Hu ◽  
Muqing Qiu
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Aqueous Solutions ◽  
Functional Groups ◽  
Void Ratio ◽  
Functionalized Graphene ◽  
Promising Candidate ◽  
Functionalized Graphene Oxide ◽  
Carbohydrate Polymer ◽  
Environmental Decontamination

The highly effective enrichment of U(vi) on COF/GO was attributed to a huge void ratio and a variety of oxygen-containing functional groups. It could be used as a promising candidate for environmental decontamination and energy storage.

Toughened Poly(Trimethylene Terephthalate) by Melt Compounding with Functionalized Graphene Oxide Nanocomposites

2019 ◽  
Vol 814 ◽  
pp. 64-69
Author(s):  
Kun Yan Wang
Keyword(s):  
Mechanical Property ◽  
Graphene Oxide ◽  
Functionalized Graphene ◽  
Electron Microscopic ◽  
Melt Mixing ◽  
Functionalized Graphene Oxide ◽  
Melt Compounding ◽  
Scanning Electron Microscopic ◽  
Trimethylene Terephthalate ◽  
Scanning Electron

Functionalized graphene oxide (fGO) nanoplates were added to the Poly (trimethylene terephthalate) (PTT) matrix by melt mixing. The mechanical property and deformation mechanism of PTT/fGO nanocomposites were studied. Addition of a small amount of fGO in PTT improves remarkably tensile properties. The elongation break of PTT/fGO increased with addition of fGO in PTT matrix owing to preferential interaction between groups of fGO and PTT matrix.. The fracture mechanism is identified by scanning electron microscopic (SEM) ananlysis of the fracture surfaces. FGO in PTT/fGO nanocomposites were homogenously dispersed in PTT matrix, indicating that the function of fGO improve the compatibility between PTT and fGO.

scholarly journals Experimental and computational studies of a graphene oxide barrier layer covalently functionalized with amino acids on Mg AZ13 alloy in salt medium

RSC Advances ◽  
2019 ◽  
Vol 9 (56) ◽  
pp. 32441-32447 ◽  
Author(s):  
N. Palaniappan ◽  
I. S. Cole ◽  
A. E. Kuznetsov ◽  
Balasubramanian K. ◽  
K. R. Justin Thomas
Keyword(s):  
Amino Acids ◽  
Graphene Oxide ◽  
Magnesium Alloy ◽  
Functional Groups ◽  
Barrier Layer ◽  
Computational Studies ◽  
Functionalized Graphene ◽  
Salt Medium ◽  
Functionalized Graphene Oxide ◽  
Oxide Barrier

Leucine functionalized graphene oxide chemisorbed on a 111 surface AZ13 magnesium alloy via edge functional groups.

Polymer Functionalized Graphene Oxide: A Versatile Nanoplatform for Drug/Gene Delivery

2015 ◽  
Vol 19 (18) ◽  
pp. 1828-1837 ◽  
Author(s):  
George V. Theodosopoulos ◽  
Panayiotis Bilalis ◽  
Georgios Sakellariou
Keyword(s):  
Graphene Oxide ◽  
Gene Delivery ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide

A covalently cross-linked reduced functionalized graphene oxide/polyurethane composite based on Diels–Alder chemistry and its potential application in healable flexible electronics

2017 ◽  
Vol 5 (1) ◽  
pp. 220-228 ◽  
Author(s):  
Jinhui Li ◽  
Guoping Zhang ◽  
Rong Sun ◽  
Ching-Ping Wong
Keyword(s):  
Graphene Oxide ◽  
Flexible Electronics ◽  
Potential Application ◽  
High Efficiency ◽  
Diels Alder ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Polyurethane Composite

A novel composite of reduced functionalized graphene oxide/polyurethane based on Diels–Alder chemistry was developed which could be healed microwaves with high efficiency and applied in healable flexible electronics.

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