A sustainable, top-down mechanosynthesis of carbohydrate-functionalized silver nanoparticles

Reverberi, Andrea P.; Vocciante, Marco; Salerno, Marco; Soda, Omar; Fabiano, Bruno

doi:10.1039/d1re00391g

Cited by 14 publications

(16 citation statements)

References 54 publications

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“…The solid-state high-temperature synthesis [ 43 ] was employed to prepare LA micropowder, which was subsequently treated with the top-down grinding technology [ 44 ] to yield LA nanoparticles. Figure 1 displays TEM and selected area electron diffraction (SAED) images.…”

Section: Resultsmentioning

confidence: 99%

“…The combination was subjected to an ultrasonic treatment for 1 h at 35 kHz, drying for 2 h at 90 °C, and milling for 3 h. Sintering at 1300 °C for three hours was applied to the resulting residue to provide the LA microparticles. The LANPs were produced by subjecting the provided phosphor microparticles to the top-down technique [ 44 ]. Ten grams of LA microparticles were put into a 20-cm-diameter ball milling tube (stainless steel) mounted on a vibrating disc.…”

Section: Methodsmentioning

confidence: 99%

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Development of Photoluminescent and Photochromic Polyester Nanocomposite Reinforced with Electrospun Glass Nanofibers

2023

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A polyester resin was strengthened with electrospun glass nanofibers to create long-lasting photochromic and photoluminescent products, such as smart windows and concrete, as well as anti-counterfeiting patterns. A transparent glass@polyester (GLS@PET) sheet was created by physically immobilizing lanthanide-doped aluminate (LA) nanoparticles (NPs). The spectral analysis using the CIE Lab and luminescence revealed that the transparent GLS@PET samples turned green under ultraviolet light and greenish-yellow in the dark. The detected photochromism can be quickly reversed in the photoluminescent GLS@PET hybrids at low concentrations of LANPs. Conversely, the GLS@PET substrates with the highest phosphor concentrations exhibited sustained luminosity with slow reversibility. Transmission electron microscopic analysis (TEM) and scanning electron microscopy (SEM) were utilized to examine the morphological features of lanthanide-doped aluminate nanoparticles (LANPs) and glass nanofibers to display diameters of 7–15 nm and 90–140 nm, respectively. SEM, energy-dispersive X-ray spectroscopy (EDXA), and X-ray fluorescence (XRF) were used to analyze the luminous GLS@PET substrates for their morphology and elemental composition. The glass nanofibers were reinforced into the polyester resin as a roughening agent to improve its mechanical properties. Scratch resistance was found to be significantly increased in the created photoluminescent GLS@PET substrates when compared with the LANPs-free substrate. When excited at 368 nm, the observed photoluminescence spectra showed an emission peak at 518 nm. The results demonstrated improved hydrophobicity and UV blocking properties in the luminescent colorless GLS@PET hybrids.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Development of Photoluminescent and Photochromic Polyester Nanocomposite Reinforced with Electrospun Glass Nanofibers

2023

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“…Microparticles of RESA were produced by milling and sieving the obtained powder. Employing the top‐down method, 34 10 g of RESA micropowder were inserted in a ball milling vial (stainless steel) mounted on a vibrating disc (20 cm). After 22 h of being grinded into a nano powder by continuous collisions of a ball mill (silicon carbide) with the ball milling vial and the vibrating disc, NRESA were produced.…”

Section: Methodsmentioning

confidence: 99%

“…19 The topdown method was then applied to produce nanoparticles of rare-earth strontium aluminate (NRESA). 34 The diameter of NRESA, as determined by TEM, is monitored between 10 and 15 nm as illustrated in Figure 2. After dispersing different concentrations of NRESA in polylactic acid dissolved in acetone, a range of nanofibers of different properties were obtained by electrospinning of NRESA@PLA.…”

Section: Color-tunable Nanofibersmentioning

confidence: 99%

Electrospinning of biopolymer nanofibers encapsulated with functional nanoparticles toward core‐shell fluorescence encoding

Abd El‐Lateef,

Khalaf,

Abou Taleb

et al. 2024

J of Applied Polymer Sci

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Photochromism has been an efficient approach to improve authenticity of commercial products. In order to prepare an authentication nanofibrous film with mechanical reliability, it has been crucial to improve the engineering production route of the authentication materials. Herein, we electrospun photoluminescent nanofibrous film with a fiber diameter of 50–200 nm from the environmentally‐friendly polylactic acid embedded with nanoparticles of rare‐earth activated strontium aluminate (NRESA; 10–15 nm). The created nanocomposite film was colorless in daylight, and became an intense green in ultraviolet light. The strontium aluminate photochromic agent must be applied in the nanoparticle form to ensure film transparency by enhancing its dispersion without aggregation in the electrospun polylactic acid nanofiber bulk. An emission peak was observed at 518 nm after excitation of the pigment‐polylactic acid nanofibers at 365 nm. Raising NRESA ratio increased the hydrophobic properties of the pigment‐polylactic acid nanofibers without changing their visual or mechanical properties. The transparent films showed high photochromic reversibility without exhaustion under numerous exposure cycles of ultraviolet light and darkness. The nanofibrous mats were elastic and flexible. The current technique is an effective strategy for making a variety of anti‐counterfeiting substances.

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“…The remediation of contaminated sites is therefore of primary importance, as evidenced by the numerous physicochemical and biological solutions developed for the recovery of contaminated water [5][6][7][8] and soils [9][10][11][12] in recent years. However, an often-overlooked aspect is that remediation activities also have an environmental impact as they frequently rely on chemical products or processes, with consequent consumption of raw materials and energy.…”

Section: Introductionmentioning

confidence: 99%

Screening of Plants and Indigenous Bacteria to Improve Arsenic Phytoextraction

Franchi

Barbafieri²,

Petruzzelli³

et al. 2022

Applied Sciences

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Arsenic (As) is one of the most common inorganic pollutants; unfortunately, it is also one of the most toxic and is therefore a cause of great concern for the health risks that could result from it. Removing arsenic from the soil using phytoremediation approaches is an effective strategy, and several studies demonstrate the ability of Cannabis sativa (TSN 19109, hemp) to tolerate this harmful contaminant. The aim of this work was to identify the best experimental conditions for a phytoremediation plan to be applied in a disused area located in Sicily (Italy) and contaminated by As, comparing Cannabis sativa with Brassica juncea (TSN 23059) and Zea mays (TSN 42269, corn). To assist the process, several chelating agents were tested to improve arsenic mobility, and two different sets of arsenic-tolerant bacteria were isolated from the rhizospheric soil of indigenous herbaceous species and used to promote plant growth, leading to a significant improvement in terms of biomass produced and phytoextraction. After the combined treatment, the arsenic content in the aerial part of the plants increased by more than two orders of magnitude (e.g., from 0.05 to 6.57 mg kg−1, from 0.04 to 6.69 mg kg−1, and from 0.03 to 5.57 mg kg−1 for brassica, corn, and hemp, respectively), confirming the marked increase in the total absorption of As by plants.

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A sustainable, top-down mechanosynthesis of carbohydrate-functionalized silver nanoparticles

Abstract: The current trend in nanoparticles (NPs) synthesis consists in addressing a multiobjective optimization, whose targets are maximization of product yield together with minimization of energy waste and risk factors related...

Cited by 14 publications

References 54 publications

Development of Photoluminescent and Photochromic Polyester Nanocomposite Reinforced with Electrospun Glass Nanofibers

Development of Photoluminescent and Photochromic Polyester Nanocomposite Reinforced with Electrospun Glass Nanofibers

Electrospinning of biopolymer nanofibers encapsulated with functional nanoparticles toward core‐shell fluorescence encoding

Screening of Plants and Indigenous Bacteria to Improve Arsenic Phytoextraction

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