Honey mediated green synthesis of graphene based NiO2/Cu2O nanocomposite (Gr@NiO2/Cu2O NCs): Catalyst for the synthesis of functionalized Schiff-base derivatives

Ansari, Mohd Zaid; Shoeb, Mohd; Nayab, Pattan Sirajuddin; Mobin, Mohammad; Uddin, Rahis; Khan, Imran; Siddiqi, Weqar Ahmad

doi:10.1016/j.jallcom.2017.11.107

Cited by 22 publications

(7 citation statements)

References 52 publications

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“…Further critical downfall of GNSs mass at approx. 445-550 °C is due to the massive break down of carbon framework [34,45].…”

Section: Thermal Gravimetric Analysis (Tga) Studymentioning

confidence: 99%

“…Up to our knowledge there are no previous studies reported on reduction mechanism of graphene oxide by glucose. In basic solution, glucose content of FC extract is first oxidized to gluconic acid which subsequently gets transformed into lactone as a side product and simultaneously reduces GO to GNSs [20,34]. These oxidized products include plenty of oxygenating groups which form hydrogen bond with the remaining oxygencontaining groups of GNS and provide good dispersion stability.…”

Section: Chemistry: Mechanism Of Graphene Oxide Reductionmentioning

confidence: 99%

“…These important constituents, especially carbohydrate (glucose and fructose), increase in terms of percentage on ripening of Ficus carica fruits [30][31][32]. Earlier studies suggested that reducing sugars such as glucose, fructose and sucrose have been used for reducing the GO [33,34]. They work via a redox mechanism which relies upon their inherent ability to form closed-chain structures.…”

Section: Introductionmentioning

confidence: 99%

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Deoxygenation of graphene oxide using biocompatible reducing agent Ficus carica (dried ripe fig)

Ansari

Siddiqui

2018

J Nanostruct Chem

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To address the environmental concerns, a relatively simple, innovative and low-cost procedure has been suggested for synthesis of graphene nanosheets (GNSs). The procedure utilized here for synthesizing GNSs is derived from aqueous suspension of graphene oxide (GO). Ficus carica (FC) is known to be remarkable antioxidant. It is regarded as suitable biocompatible alternative to hazardous and toxic chemicals. This method ensures non-hazardous nature of the deoxygenating agent (FC) as well as their oxidized outcomes. Structural and morphological characterization indicates the absence of oxygen-bearing groups from graphene oxide. Characterization was done by standard techniques such as X-ray crystallography, FTIR, RAMAN, DLS, and UV-Vis spectrophotometry. Morphological investigation of resulting material was also undertaken through standard techniques by FESEM, TEM, HRTEM with SAED pattern. Thermal stability of FC derived graphene was also investigated. The investigation may initiate new routes for preparing GNSs at large scale facilitating a better research and commercial utilization.

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“…Further critical downfall of GNSs mass at approx. 445-550 °C is due to the massive break down of carbon framework [34,45].…”

Section: Thermal Gravimetric Analysis (Tga) Studymentioning

confidence: 99%

Section: Chemistry: Mechanism Of Graphene Oxide Reductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Deoxygenation of graphene oxide using biocompatible reducing agent Ficus carica (dried ripe fig)

Ansari

Siddiqui

2018

J Nanostruct Chem

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“…However, the separation of rGO from the reaction mixture is very difficult and is responsible for the several environmental problems [61] . The drawback related to recyclability can be well addressed by amalgamation of magnetic nanoparticles with rGO to produce environmentally benign nanohybrids, which can be easily separated from the reaction mixture and exhibits excellent recyclability and reusability [62] . The functionalization of magnetic nanoparticles with rGO not only provides magnetic nature to nanohybrid but also enhances catalytic performance of nanohybrid due to the synergistic interactions between rGO and magnetic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Ring Opening of Epoxides and Aziridines with Benzotriazoles Using Magnetically Retrievable Graphene Based (CoFe@rGO) Nanohybrid

et al. 2021

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Reduced Graphene oxide (rGO) behaves as an excellent heterogeneous catalyst because of its remarkable characteristics such as large specific surface area and high thermal stability. In this regard, Graphene oxide was converted to magnetic nanohybrid (CoFe@rGO) and utilized as an efficient heterogeneous catalyst for the ring opening reactions and act as Lewis acid to promote the reaction. Developed a new facile, environmentally benign and green methodology for the synthesis of β‐hydroxytriazoles and β‐N‐tosylsulfonamidetriazoles derivatives via ring opening reaction of epoxides and aziridines respectively in the presence of CoFe@rGO nanohybrid as catalyst in good to excellent yields under solvent free reaction conditions. Catalyst was separated from the reaction mixture by an external magnet, recycled and reused up to six catalytic runs without significant loss of catalytic activity. Environmentally benign conditions, cheap starting materials, shorter reaction times, easy work‐up and purification of the products, high regioselectivity, high yields, recyclability and reusability of catalyst are the main advantages of our protocol.

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“…12−15 Among them, graphene, a 2D nanomaterial, has also revealed various applications in different fields such as energy storage, nanoelectronics, nanocatalysis, and antimicrobial properties. 16−19 Recently, among these applications, the biomedical potentiality of graphene and its own functionalized derivatives have received much more attention from a medicinal chemist for drug discovery. 15 Heretofore, graphene-based nanomaterial, such as graphene oxide (GO), reduced GO (RGO), graphene quantum dots, and graphene-based nanocomposites, being implemented to biosensors, bioimaging, drug delivery, and photothermal therapy.…”

Section: Introductionmentioning

confidence: 99%

In Vitro and in Vivo Antimicrobial Evaluation of Graphene–Polyindole (Gr@PIn) Nanocomposite against Methicillin-Resistant Staphylococcus aureus Pathogen

et al. 2018

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Nowadays, the infection caused by the methicillin-resistant Staphylococcus aureus (MRSA) and countless different types of bacterial infection cause the death of millions of people worldwide. Thereby, several strategies have explored for the advancement of better and active antimicrobial agents; one of these lies in the form of two-dimensional carbon-based nanocomposites. Herein, we demonstrate the synthesis of the graphene–polyindole (Gr@PIn) nanocomposite and polyindole (PIn) and significantly enhance the proficiency against MRSA strains which are immune to most antibiotics. The synthesized Gr@PIn and PIn have been characterized by the various biophysical techniques, especially X-ray diffraction (XRD), electron microscopy [scanning electron microscopy (SEM) and transmission electron microscopy (TEM)], Fourier transform infrared, Raman, UV–vis spectroscopy, and thermogravimetric analysis. Electron microscopic investigations unveiled the disintegration of bacterial cell wall upon interaction with Gr@PIn. Significantly, the Gr@PIn found to be very potent in the eradication of the MRSA strain with minimal toxicity to the mammalian cells. Assessment of the antibacterial mechanism revealed that the Gr@PIn adhered toward the bacterial surface, irreversibly interrupted the membrane layer structure of the bacteria, eventually penetrated cells, and efficiently impeded protein activity, which inherently turns into bacterial apoptosis in vitro. Moreover, last, the synthesized Gr@PIn efficiently treated the S. aureus -mediated experimental skin infection in BALB/c mice as well. This work magnifies our comprehending antibacterial mechanism of nonmetallic graphene-based PIn nanocomposite and provides the support to activity anticipation.

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Honey mediated green synthesis of graphene based NiO2/Cu2O nanocomposite (Gr@NiO2/Cu2O NCs): Catalyst for the synthesis of functionalized Schiff-base derivatives

Cited by 22 publications

References 52 publications

Deoxygenation of graphene oxide using biocompatible reducing agent Ficus carica (dried ripe fig)

Deoxygenation of graphene oxide using biocompatible reducing agent Ficus carica (dried ripe fig)

Ring Opening of Epoxides and Aziridines with Benzotriazoles Using Magnetically Retrievable Graphene Based (CoFe@rGO) Nanohybrid

In Vitro and in Vivo Antimicrobial Evaluation of Graphene–Polyindole (Gr@PIn) Nanocomposite against Methicillin-Resistant Staphylococcus aureus Pathogen

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