scholarly journals Macroscopic and Spectroscopic Investigations of the Adsorption of Nitroaromatic Compounds on Graphene Oxide, Reduced Graphene Oxide, and Graphene Nanosheets

2015 ◽  
Vol 49 (10) ◽  
pp. 6181-6189 ◽  
Author(s):  
Xiaoxiao Chen ◽  
Baoliang Chen
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Graphene Nanosheets ◽  
Nitroaromatic Compounds ◽  
Spectroscopic Investigations ◽  
Reduced Graphene

scholarly journals Green Synthesis of Reduced Graphene Nanosheets Using Leaf Extract of Tridax procumbens and its Potential In-Vitro Biological Activities

2020 ◽  
Vol 2 (1) ◽  
pp. 93
Keyword(s):  
Graphene Oxide ◽  
Green Synthesis ◽  
Reduced Graphene Oxide ◽  
Leaf Extract ◽  
Spectroscopic Analysis ◽  
Graphene Nanosheets ◽  
Biological Activities ◽  
Tridax Procumbens ◽  
Reduced Graphene

Graphene oxide nanoparticles has found immense application in bio therapeutics owing to its biocompatibility and enhanced effectiveness in drug delivery. The present study investigates the green synthesis of reduced graphene oxide using leaf extract using Tridax procumbens and testing its in-vitro biological activities. The biosynthesized reduced graphene oxide (rGO) was characterized by various spectroscopic and microscopic techniques. UV-vis spectroscopic analysis primarily detected the shift in the absorption peak from 232 to 287 nm confirming the reduction of TP-rGO. FTIR spectra of TP-rGO confirmed effective deoxygenation of GO assisted by bioactive molecules present in the leaf extract. Raman spectroscopic analysis identified successful reduction of GO through the presence of D band at 1329 cm-1 and G band at 1577 cm-1. XRD spectra of TP-rGO showed diffraction peak 2θ at 25o confirming the presence of reduced GO. SEM analysis revealed the presence of graphene nanosheets appearing as large aggregated structure. The bioreduced rGO showed anti-oxidant effect against DPPH radical observed in concentration dependent manner. The TP-rGO nanosheets exhibited bactericidal effect against gram positive bacteria: B.subitils (18 mm) and S. epidermis (9 mm) and gram negative bacteria: E.coli (14 mm) and P. aeruginosa (6 mm) at 100 µg/ml confirming the enhanced anti-bacterial effects of TP-rGO against gram positive pathogens. Hence, it is highlighted that leaf extract of Tridax procumbens act as green reducing agent for the successful biosynthesis of rGO nanosheets demonstrating potential in-vitro biological activities and has great scope in the preparation of nano drugs for the treatment of various diseases.

scholarly journals Correction: Covalent organic functionalization of graphene nanosheets and reduced graphene oxide via 1,3-dipolar cycloaddition of azomethine ylide

2021 ◽  
Author(s):  
Luca Basta ◽  
Aldo Moscardini ◽  
Filippo Fabbri ◽  
Luca Bellucci ◽  
Valentina Tozzini ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Graphene Nanosheets ◽  
Azomethine Ylide ◽  
Dipolar Cycloaddition ◽  
Organic Functionalization ◽  
Reduced Graphene

Correction for ‘Covalent organic functionalization of graphene nanosheets and reduced graphene oxide via 1,3-dipolar cycloaddition of azomethine ylide’ by Luca Basta et al., Nanoscale Adv., 2021, DOI: 10.1039/D1NA00335F.

Cuprous oxide microspheres on graphene nanosheets: an enhanced material for non-enzymatic electrochemical detection of H2O2 and glucose

RSC Advances ◽  
2015 ◽  
Vol 5 (44) ◽  
pp. 35338-35345 ◽  
Author(s):  
Junwei Ding ◽  
Wei Sun ◽  
Gang Wei ◽  
Zhiqiang Su
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Sensor ◽  
Reduced Graphene Oxide ◽  
Electrochemical Detection ◽  
Cuprous Oxide ◽  
Graphene Nanosheets ◽  
Graphene Oxide Nanosheets ◽  
Sensor Material ◽  
Reduced Graphene

Reduced graphene oxide nanosheets decorated with cuprous oxide microspheres show improved performances as a novel electrochemical sensor material.

Cyanate Ester Resin Filled with Graphene Nanosheets and NiFe2O4–Reduced Graphene Oxide Nanohybrids for Efficient Electromagnetic Interference Shielding

NANO ◽  
2017 ◽  
Vol 12 (06) ◽  
pp. 1750066 ◽  
Author(s):  
Fang Ren ◽  
Yanfei Shi ◽  
Penggang Ren ◽  
Xiaohuan Si ◽  
Huan Wang
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electromagnetic Interference ◽  
Graphene Nanosheets ◽  
Cyanate Ester ◽  
Electromagnetic Properties ◽  
Scanning Electron Micrographs ◽  
Emi Shielding ◽  
Blending Method ◽  
Reduced Graphene

An effective electromagnetic interference (EMI) shielding cyanate ester (CE) composite has been fabricated with a combination of graphene nanosheets (GNSs) and nickel ferrite (NiFe2O[Formula: see text] particles. NiFe2O4 particles were loaded on the reduced graphene oxide (RGO) to improve the dispersibility while the composites were synthesized via solution blending method. Scanning electron micrographs (SEM) showed good dispersion of GNSs and RGO–NiFe2O4 in CE. Electromagnetic properties and EMI shielding effectiveness (SE) of the nanocomposites were determined over X-bands (8.2–12.4[Formula: see text]GHz). It was observed that the EMI shielding performance of composites was improved by increasing the filler loading of composites and absorption was found to be the dominant shielding mechanism. The total EMI SE is almost reaching 50[Formula: see text]dB for samples with thicknesses of [Formula: see text]2.7[Formula: see text]mm, which suggests that the GNSs/RGO–NiFe2O4/CE could be good candidates for highly efficient EMI shielding materials in the whole X-band.

Synthesis of graphene-based solid acid for catalytic reducing of p-nitrophenol

2019 ◽  
Vol 13 (01) ◽  
pp. 1950091
Author(s):  
Ping Yang ◽  
Taotao Nie ◽  
Jun Hu ◽  
Huiqiong Ni ◽  
Jianjun Shi
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Method ◽  
Reduced Graphene Oxide ◽  
Metal Ion ◽  
Solid Acid ◽  
Graphene Nanosheets ◽  
Reduced Graphene

A novel graphene-based solid acid was successfully prepared through loading Co and Ni onto the surface of reduced graphene nanosheets with hydrothermal method. After sulfonation of the as-synthesized reduced graphene oxide (rGO)-Ni-Co composites, a kind of solid acid was prepared for reducing p-Nitrophenol (PNP) into p-Aminophenol (PAP). The result shows that the sulfonated rGO-Ni-Co composites have better catalytic ability than rGO-Ni-Co composites. These findings may provide a facile method to prepare solid acid which consists of rGO and metal ion for its application in catalysis fields.

scholarly journals Covalent organic functionalization of graphene nanosheets and reduced graphene oxide via 1,3-dipolar cycloaddition of azomethine ylide

2021 ◽  
Vol 3 (20) ◽  
pp. 5841-5852
Author(s):  
Luca Basta ◽  
Aldo Moscardini ◽  
Filippo Fabbri ◽  
Luca Bellucci ◽  
Valentina Tozzini ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Graphene Nanosheets ◽  
Azomethine Ylide ◽  
Dipolar Cycloaddition ◽  
Controlled Synthesis ◽  
Nanoscale Devices ◽  
Organic Functionalization ◽  
Reduced Graphene ◽  
Significant Step

Organic functionalization of graphene nanosheets and rGO via 1,3-dipolar cycloaddition of azomethine ylide is shown to be a significant step towards a controlled synthesis of graphene-based advanced nanoscale devices with engineered functionalities.

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