Synthesis and Characterization of Poly(vinyl pyrrolidone)/Reduced Graphene Oxide Nanocomposite

Chen, Songchao; Cheng, Bowen; Ding, Changkun

doi:10.1080/00222348.2015.1010433

Cited by 16 publications

(14 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…FTIR spectrum of PVP-stabilized Ag NPs mainly displays absorption band characteristics for PVP. 46,47 A strong peak at 1286 cm −1 , typical of a -C-N bond, and a peak at 1635 cm -1 related to the carbonyl group C=O are observed in the Ag NP spectrum. Oxygen and nitrogen atoms arising from PVP units are involved in the formation of coordination bonds with silver atoms 48 and GO.…”

Section: Characteristics Of the Go-ag Nanocompositementioning

confidence: 99%

“…Oxygen and nitrogen atoms arising from PVP units are involved in the formation of coordination bonds with silver atoms 48 and GO. 47 In the spectrum of GO-Ag HN, the carboxylic (C=C) and carbonyl (C=O) stretching vibrations of the GO carbon skeletal structure are redshifted. This can be attributed to the functionalization process that occurred through bonding between GO and PVP-stabilized Ag NPs.…”

Section: Characteristics Of the Go-ag Nanocompositementioning

confidence: 99%

“…Besides, the changes of wavenumbers for the -OH stretching vibrations (from 3401 to 3447 cm −1 ) are usually related to hydrogen bonding formation. 47 The chemical state of materials to be tested was investigated using XPS analysis. In Figure 4A the survey spectra clearly demonstrate the peaks associated with C 1s, O 1s in GO and C 1s, O 1s, N 1s, Ag 3d in the hybrid nanocomposite.…”

Section: Characteristics Of the Go-ag Nanocompositementioning

confidence: 99%

See 2 more Smart Citations

<p>Effect of Graphene Oxide and Silver Nanoparticles Hybrid Composite on P. aeruginosa Strains with Acquired Resistance Genes</p>

Lozovskis

Jankauskaitė

Guobienė

et al. 2020

IJN

View full text Add to dashboard Cite

Background: In the last decades, nosocomial infections caused by drug-resistant Pseudomonas aeruginosa became a common problem in healthcare facilities. Antibiotics are becoming less effective as new resistant strains appear. Therefore, the development of novel enhanced activity antibacterial agents becomes very significant. A combination of nanomaterials with different physical and chemical properties enables us to generate novel multi-functional derivatives. In this study, graphene oxide and polyvinylpyrrolidonestabilized silver nanoparticles hybrid nanocomposite (GO-Ag HN) were synthesized. The relation between antibiotic resistance and GO-Ag HN potential toxicity to clinical P. aeruginosa strains, their antibiotic resistance, and molecular mechanisms were assessed. Methods: Chemical state, particle size distribution, and morphology of synthesized GO-Ag NH were investigated using spectroscopy and microscopy techniques (UV-Vis, FTIR, XPS, TEM, SEM, AFM). Broad-spectrum antibiotic resistance of P. aeruginosa strains was determined using E-test. Antibiotic resistance genes were identified using polymerase chain reaction (PCR). Results: In this study, the toxicity of the GO-Ag NH to the isolated clinical P. aeruginosa strains has been investigated. A high antibiotic resistance level (92%) was found among P. aeruginosa strains. The most prevalent antibiotic resistance gene among tested strains was the AMPC betalactamase gene (65.6%). UV-vis, FTIR, and XPS studies confirmed the formation of the silver nanoparticles on the GO nanosheets. The functionalization process occurred through the interaction between Ag nanoparticles, GO, and polyvinylpyrrolidone used for nanoparticle stabilization. SEM analysis revealed that GO nanosheets undergo partial fragmentation during hybrid nanocomposite preparation, which remarkably increases the number of sharp edges and their mediated cutting effect. TEM analysis showed that GO-Ag HN spherical Ag nanoparticles mainly 9-12 nm in size were irregularly precipitated on the GO nanosheet surface. A higher density of Ag NPs was observed in the sheets' wrinkles, corrugations, and sharp edges. This hybrid nanocomposite poses enhanced antibacterial activity against carbapenem-resistant P. aeruginosa strains through a possible synergy between toxicity mechanisms of GO nanosheets and Ag nanoparticles. With incubation time increasing up to 10 minutes, the survival of P. aeruginosa decreased significantly. Conclusion: A graphene oxide and silver nanoparticles hybrid composite has been shown to be a promising material to control nosocomial infections caused by bacteria strains resistant to most antibiotics.

show abstract

Section: Characteristics Of the Go-ag Nanocompositementioning

confidence: 99%

Section: Characteristics Of the Go-ag Nanocompositementioning

confidence: 99%

Section: Characteristics Of the Go-ag Nanocompositementioning

confidence: 99%

See 1 more Smart Citation

<p>Effect of Graphene Oxide and Silver Nanoparticles Hybrid Composite on P. aeruginosa Strains with Acquired Resistance Genes</p>

Lozovskis

Jankauskaitė

Guobienė

et al. 2020

IJN

View full text Add to dashboard Cite

show abstract

“…This was believed for stable graphene dispersion with poly-N-vinyl-2-pyrrolidone (PNVP). Many reports are available on the fabrication or functionalization of graphene surfaces using NVP [37][38][39][40]. However, many of them include the preparation of graphene dispersions using graphene derivatives, such as graphene oxide and reduced graphene oxide [39,40].…”

Section: Introductionmentioning

confidence: 99%

Exfoliation and Noncovalent Functionalization of Graphene Surface with Poly-N-Vinyl-2-Pyrrolidone by In Situ Polymerization

et al. 2021

View full text Add to dashboard Cite

Heteroatom functionalization on a graphene surface can endow the physical and structural properties of graphene. Here, a one-step in situ polymerization method was used for the noncovalent functionalization of a graphene surface with poly-N-vinyl-2-pyrrolidone (PNVP) and the exfoliation of graphite into graphene sheets. The obtained graphene/poly-N-vinyl pyrrolidone (GPNVP) composite was thoroughly characterized. The surface morphology of GPNVP was observed using field emission scanning electron microscopy and high-resolution transmission electron microscopy. Raman spectroscopy and X-ray diffraction studies were carried out to check for the exfoliation of graphite into graphene sheets. Thermogravimetric analysis was performed to calculate the amount of PNVP on the graphene surface in the GPNVP composite. The successful formation of the GPNVP composite and functionalization of the graphene surface was confirmed by various studies. The cyclic voltammetry measurement at different scan rates (5–500 mV/s) and electrochemical impedance spectroscopy study of the GPNVP composite were performed in the typical three-electrode system. The GPNVP composite has excellent rate capability with the capacitive property. This study demonstrates the one-pot preparation of exfoliation and functionalization of a graphene surface with the heterocyclic polymer PNVP; the resulting GPNVP composite will be an ideal candidate for various electrochemical applications.

show abstract

“…Over the past few decades, Nanoscience has emerged as a new promising interdisciplinary scientific field [1][2][3][4]. Nanoclusters have been investigated for many catalytic applications due to their large surface-to-volume ratio.…”

Section: Introductionmentioning

confidence: 99%

Polyvinylpyrrolidone - Reduced Graphene Oxide - Pd Nanoparticles as an Efficient Nanocomposite for Catalysis Applications in Cross-Coupling Reactions

Elazab

El-Idreesy

2019

Bull. Chem. React. Eng. Catal.

View full text Add to dashboard Cite

This paper reported a scientific approach adopting microwave-assisted synthesis as a synthetic route for preparing highly active palladium nanoparticles stabilized by polyvinylpyrrolidone (Pd/PVP) and supported on reduced Graphene oxide (rGO) as a highly active catalyst used for Suzuki, Heck, and Sonogashira cross coupling reactions with remarkable turnover number (6500) and turnover frequency of 78000 h -1 . Pd/PVP nanoparticles supported on reduced Graphene oxide nanosheets (Pd-PVP/rGO) showed an outstanding performance through high catalytic activity towards cross coupling reactions. A simple, reproducible, and reliable method was used to prepare this efficient catalyst using microwave irradiation synthetic conditions. The synthesis approach requires simultaneous reduction of palladium and in the presence of Gaphene oxide (GO) nanosheets using ethylene glycol as a solvent and also as a strong reducing agent. The highly active and recyclable catalyst has so many advantages including the use of mild reaction conditions, short reaction times in an environmentally benign solvent system. Moreover, the prepared catalyst could be recycled for up to five times with nearly the same high catalytic activity. Furthermore, the high catalytic activity and recyclability of the prepared catalyst are due to the strong catalyst-support interaction. The defect sites in the reduced Graphene oxide (rGO) act as nucleation centers that enable anchoring of both Pd/PVP nanoparticles and hence, minimize the possibility of agglomeration which leads to a severe decrease in the catalytic activity.one of the main interests that attracted researchers' attention is transition metals based materials, especially when using palladium nanoparticles [5][6][7][8][9][10]. It is well established that palladium-based catalysts have been widely used in homogeneous and heterogeneous catalysis due to their several outstanding properties that combine between those of single metal atoms and other bulk metals [11][12][13][14][15][16]. In order to design new compounds with tailored chemical and

show abstract

Synthesis and Characterization of Poly(vinyl pyrrolidone)/Reduced Graphene Oxide Nanocomposite

Cited by 16 publications

References 37 publications

<p>Effect of Graphene Oxide and Silver Nanoparticles Hybrid Composite on P. aeruginosa Strains with Acquired Resistance Genes</p>

<p>Effect of Graphene Oxide and Silver Nanoparticles Hybrid Composite on P. aeruginosa Strains with Acquired Resistance Genes</p>

Exfoliation and Noncovalent Functionalization of Graphene Surface with Poly-N-Vinyl-2-Pyrrolidone by In Situ Polymerization

Polyvinylpyrrolidone - Reduced Graphene Oxide - Pd Nanoparticles as an Efficient Nanocomposite for Catalysis Applications in Cross-Coupling Reactions

Contact Info

Product

Resources

About