Enhanced functionality of green synthesized sulfur nanoparticles using kiwifruit (Actinidia deliciosa) peel polyphenols as capping agents

Priyadarshi, Ruchir; Roy, Swarup; Rhim, Jong‐Whan

doi:10.1007/s40097-021-00422-9

Cited by 26 publications

(20 citation statements)

References 33 publications

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“…Since optical phenomena, particularly photoluminescence, are characteristic of quantum dots, absorption and emission spectra were recorded to confirm the synthesis of SQDs. The UV–visible absorption spectrum of the SQDs (Figure S1a, Supporting Information) exhibits two distinct absorption peaks at 300 nm and 361 nm corresponding to n → σ* transition , and n → π* transition, respectively, which are characteristic absorptions of elemental sulfur present in the SQD. As reported earlier, the highest emission intensity for SQDs is achieved when excited at 360 nm .…”

Section: Resultsmentioning

confidence: 99%

“…Since then, several synthesis methods were reported that either used sublimed elemental sulfur or sulfur-containing compounds like sodium sulfide as a precursor material. , Among them, the hydrothermal method is of great interest due to its facile synthesis and cost-effectiveness . In addition, sublimated elemental sulfur, which can be obtained inexpensively as a byproduct of the desulfurization process of petroleum refining, can be utilized in this method. , Several studies have reported the utilization of SQDs for biomedical research involving signal transduction and cell entry mechanism, live-cell imaging, , etc. In addition, these quantum dots have also been used for the sensing and detection of toxic compounds.…”

Section: Introductionmentioning

confidence: 99%

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Sulfur Quantum Dots as Fillers in Gelatin/Agar-Based Functional Food Packaging Films

Priyadarshi

Riahi

Rhim

et al. 2021

ACS Appl. Nano Mater.

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The present work is the first attempt to study the applicability of sulfur quantum dots (SQDs) as functional fillers for food packaging biopolymer films. SQDs were prepared via hydrothermal synthesis using sublimated sulfur powder. The SQDs were 8.7 nm in size and consisted of an elemental sulfur core stabilized by PEG-400 confirmed by TEM, FTIR, and XPS characterization. The SQDs exhibited a high surface charge of −13.9 mV, indicating good dispersion in aqueous suspensions. In addition, the SQDs showed high antioxidant and antimicrobial activities with almost negligible toxicity toward L929 cells even at prolonged exposure of 72 h. The addition of SQDs to the gelatin/agar blend films increased the UV-barrier property without compromising color and transparency. The composite film showed excellent antioxidant activity, a moderate bactericidal effect on Listeria monocytogenes, and an inhibitory effect on Escherichia coli. The SQDs are likely to be value-added, low-cost, safe, and multifunctional nanofillers for preparing functional films in active packaging applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sulfur Quantum Dots as Fillers in Gelatin/Agar-Based Functional Food Packaging Films

Priyadarshi

Riahi

Rhim

et al. 2021

ACS Appl. Nano Mater.

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“…In the last few years, kiwi peels extract has been successfully used to fabricate nanoparticles using a cost effective and eco-friendly green method of synthesis. Zinc oxide (ZnO), titanium dioxide (TiO 2 ), and tin oxide (SnO 2 ) nanoparticles (NPs) were prepared by exploiting the polyphenolic component of kiwi peels used as reducing and capping agent for NPs preparation and stabilization [ 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Valorization of Kiwi Peels: Fractionation, Bioactives Analyses and Hypotheses on Complete Peels Recycle

Cairone

Garzoli

Menghini³

et al. 2022

Foods

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Kiwi fruit samples (Actinidia deliciosa Planch, cv. Hayward) represent a suitable and good source for fibers obtainment as well as for polyphenolic and carotenoid extraction. With this aim, in this study they were submitted to a double phase extraction to separate insoluble fibers by an organic phase containing lipophilic substances and an hydroalcoholic phase containing polyphenols and soluble fibers. Insoluble fibers could be separated by filtration and sent to be micronized and reused. Hydroalcoholic fractions were then furtherly fractionated by solid-phase extraction. Data coming from the color CIEL*a*b* and the HPLC-DAD analyses of the extracts were compared and correlate with those coming from the SPME-GC/MS analysis of either the finely shredded peels or of the extracts. The obtained extracts were also submitted to anti-radical activity evaluation and anti-Candida activity. Results show that all of the obtained residues are value added products. Hypotheses were also made about the nature and the possible recycle of the obtained purified solid residue.

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“…More potent antimicrobial activity of SNPs against L. monocytogenes was reported earlier. 24,59 On the other hand, E. coli is a mesophilic bacterium and generally grows at higher temperatures (>25 °C). The Carr/SNP films, hence, were not much effective against this bacterial strain.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Carrageenan-Based Antimicrobial Films Integrated with Sulfur-Coated Iron Oxide Nanoparticles (Fe₃O₄@SNP)

Saedi

Shokri

Priyadarshi

et al. 2021

ACS Appl. Polym. Mater.

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Recently, antibacterial nanocomposite films containing sulfur nanoparticles (SNPs) have been attracting attention in the food packaging field; however, due to the hydrophobic properties of SNPs, dispersion in hydrophilic biopolymers is nonuniform. Therefore, the functionality of SNPs is not fully utilized. For addressing this, sulfur-coated Fe3O4 hybrid nanoparticles (Fe3O4@SNP) with a core–shell structure were synthesized. Functional nanocomposite films of carrageenan were fabricated by integrating with Fe3O4, SNP, and Fe3O4@SNP nanoparticles, and their properties, including mechanical strength, UV–vis barrier, water vapor permeability (WVP), surface morphology, thermal stability, water contact angle (WCA), surface color, and antibacterial activity, were studied. The Fe3O4@SNP hybrid nanoparticles were dispersed uniformly in the carrageenan matrix. Fe3O4@SNP blocked UV light more effectively (T 280 = 1.3 ± 0.2%) than SNP (T 280 = 46.5 ± 0.0%). In addition, Fe3O4@SNP showed stronger antibacterial activity against Escherichia coli and Listeria monocytogenes than SNP. SNP showed 0.63 and 2.87 log CFU/g reduction of E. coli and L. monocytogenes, respectively, whereas Fe3O4@SNP exhibited 3.20 and 4.59 log CFU/g.

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Enhanced functionality of green synthesized sulfur nanoparticles using kiwifruit (Actinidia deliciosa) peel polyphenols as capping agents

Cited by 26 publications

References 33 publications

Sulfur Quantum Dots as Fillers in Gelatin/Agar-Based Functional Food Packaging Films

Sulfur Quantum Dots as Fillers in Gelatin/Agar-Based Functional Food Packaging Films

Valorization of Kiwi Peels: Fractionation, Bioactives Analyses and Hypotheses on Complete Peels Recycle

Carrageenan-Based Antimicrobial Films Integrated with Sulfur-Coated Iron Oxide Nanoparticles (Fe₃O₄@SNP)

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Enhanced functionality of green synthesized sulfur nanoparticles using kiwifruit (Actinidia deliciosa) peel polyphenols as capping agents

Cited by 26 publications

References 33 publications

Sulfur Quantum Dots as Fillers in Gelatin/Agar-Based Functional Food Packaging Films

Sulfur Quantum Dots as Fillers in Gelatin/Agar-Based Functional Food Packaging Films

Valorization of Kiwi Peels: Fractionation, Bioactives Analyses and Hypotheses on Complete Peels Recycle

Carrageenan-Based Antimicrobial Films Integrated with Sulfur-Coated Iron Oxide Nanoparticles (Fe3O4@SNP)

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Product

Resources

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Carrageenan-Based Antimicrobial Films Integrated with Sulfur-Coated Iron Oxide Nanoparticles (Fe₃O₄@SNP)