Green synthesis, characterization and antibacterial activity of gold nanoparticles using hydroxyethyl starch-g-poly (methylacrylate-co-sodium acrylate): A novel biodegradable graft copolymer

Das, Subhadip; Pandey, Akhil; Pal, Sagar; Kolya, Haradhan; Tripathy, Tridib

doi:10.1016/j.molliq.2015.09.020

Cited by 21 publications

(20 citation statements)

References 34 publications

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“…[1][2][3][4] However their high surface activity leads to a tendency to aggregate, reducing their activity as catalysts. [1][2][3][4] However their high surface activity leads to a tendency to aggregate, reducing their activity as catalysts.…”

Section: Introductionmentioning

confidence: 99%

Eco-friendly synthesis and catalytic application of chitosan/gold/carbon nanotube nanocomposite films

et al. 2016

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a Novel eco-friendly chitosan nanocomposite membranes containing gold nanoparticles and carbon nanotubes (CNTs) have been synthesized. The catalytic activity of the nanocomposites was explored using a model reduction reaction of 4nitrophenol to 4-aminophenol. Kinetic studies demonstrated that the presence of CNTs increased the rate of the reaction, mainly by reducing the induction time. TEM images confirmed the uniform distribution of gold and CNTs in the chitosan matrices. Scanning electron microscopy micrographs revealed that the inclusion of CNTs led to a more compact and less porous network structure which improved the mechanical properties of the films. Catalytically active membranes prepared from the nanocomposites could be reused at least ten times with no loss of mechanical integrity or catalytic effect, opening up the possibility of using this new, environmentally-friendly catalyst support in a continuous flow system.

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Section: Introductionmentioning

confidence: 99%

Eco-friendly synthesis and catalytic application of chitosan/gold/carbon nanotube nanocomposite films

et al. 2016

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“…Das et al [52] prepared AuNPs by means of an environmentally friendly process using a biodegradable copolymer synthesized by the graft polymerization of hydroxyl ethyl starch (HES) and methylacrylate (MA). • which corresponds to the planes of (111), (200), (220), and (311), respectively, for AuNPs synthesized using chitosan oligosaccharide (COS) loaded with Paclitaxel (PTX) used as anticancer drug [43].…”

Section: X-ray Spectroscopy: X-ray Diffraction Xrdmentioning

confidence: 99%

“…Different mechanisms have been proposed to explain the antibacterial activity of NPs as follows: (1) antibacterial activity is associated with the action of the ions released by the nanoparticles, and (2) when NPs penetrate the bacterial cell membrane, it dies [13,126]. Therefore, the size, shape, concentration, and stability of NPs are crucial parameters [52,126].…”

Section: Antibacterialmentioning

confidence: 99%

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Nanoengineering of Gold Nanoparticles: Green Synthesis, Characterization, and Applications

et al. 2019

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The fundamental aspects of the manufacturing of gold nanoparticles (AuNPs) are discussed in this review. In particular, attention is devoted to the development of a simple and versatile method for the preparation of these nanoparticles. Eco-friendly synthetic routes, such as wet chemistry and biosynthesis with the aid of polymers, are of particular interest. Polymers can act as reducing and/or capping agents, or as soft templates leading to hybrid nanomaterials. This methodology allows control of the synthesis and stability of nanomaterials with novel properties. Thus, this review focus on a fundamental study of AuNPs properties and different techniques to characterize them, e.g., Transmission Electron Microscopy (TEM), Atomic Force Microscopy (AFM), UV-Visible spectroscopy, Dynamic Light Scattering (DLS), X-Ray Diffraction (XRD), X-Ray Photoelectron Spectroscopy, Small-angle X-Ray Scattering (SAXS), and rheology. Recently, AuNPs obtained by “green” synthesis have been applied in catalysis, in medicine, and as antibacterials, sensors, among others.

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“…Therefore, the preparation of metal nanoparticles by green technique are free from toxic hazardous chemicals and has gained much importance in several applications. Among the various nanoparticles, gold (Au) nanocomposites/nanoparticles are synthesised by green method as well as chemical method and their wide range of applications are also reported . Recently synthesis of various metal nanoparticles including Au by the use of polysaccharide based graft copolymer has gained considerable importance for various applications because of their eco‐friendly in nature and has greater potentiality to act as reducing and capping agents .…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Electrochemical Sensing of p‐Aminophenol and Hydroquinone by Using Grafted Tricholoma Mushroom Polysaccharide/Gold Composite Nanoparticles in Aqueous Media

Mondal

Bhanja²,

Tripathy

2019

ChemistrySelect

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Herein, we report for the first time a novel electrochemical sensor for the simultaneous detection of para‐aminophenol (p‐AP) and hydroquinone (HQ) in aqueous medium using Tricholoma mushroom polysaccharide based graft copolymer‐Au composite nanoparticles (TMPG−Au NPs). The graft copolymer is synthesised by radical polymerization technique in aqueous medium using a mixture of acrylamide (AM), acrylic acid (AA) and Tricholoma mushroom polysaccharide (TMP). Further, TMPG−Au NPs is prepared using the graft copolymer as a reducing as well as stabilizing agent by green technique. The graft copolymer and TMPG−Au NPs are properly characterised. The detection of p‐AP and HQ in aqueous medium is carried out by linear sweep voltammetry (LSV) and Chronoamperometry (CA) without interfering other common phenolic compounds and environmentally relevant metal ions. In LSV experiment the p‐AP and HQ show clear and distinct oxidation peaks at 0.0814 V and −0.077 V respectively. The proposed sensor successfully detects p‐AP and HQ with very low detection limit 0.41 μM and 0.32 μM respectively and effectively.

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Green synthesis, characterization and antibacterial activity of gold nanoparticles using hydroxyethyl starch-g-poly (methylacrylate-co-sodium acrylate): A novel biodegradable graft copolymer

Cited by 21 publications

References 34 publications

Eco-friendly synthesis and catalytic application of chitosan/gold/carbon nanotube nanocomposite films

Eco-friendly synthesis and catalytic application of chitosan/gold/carbon nanotube nanocomposite films

Nanoengineering of Gold Nanoparticles: Green Synthesis, Characterization, and Applications

Simultaneous Electrochemical Sensing of p‐Aminophenol and Hydroquinone by Using Grafted Tricholoma Mushroom Polysaccharide/Gold Composite Nanoparticles in Aqueous Media

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