Sonochemical synthesis of porous gold nano- and microparticles in a Rosette cell

Usen, Ndifreke; Dahoumane, Si Amar; Diop, Mamadi; Banquy, Xavier; Boffito, Daria C.

doi:10.1016/j.ultsonch.2021.105744

Cited by 6 publications

(5 citation statements)

References 48 publications

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“…The nanoparticles’ color depends on the size and shape of the nanoparticles as well as the distance between them. Nanoparticles appear certain colors because they resonate at frequencies within the visible spectrum of light and absorb (resonate) specific wavelengths of visible light. − In general, their optical properties are reported to be dependent on the size, and gold nanoparticles smaller than 30 nm are ruby red; up to 100 nm, they are pink and larger appear darker in color. − Color change occurs with reducing size of particles as it approaches the nano range; it happens because of the changed properties of the material due to the increased surface area of the small nanosized particles.…”

Section: Experimental Methodsmentioning

confidence: 99%

Plasmonic Eyeglasses Based on Gold Nanoparticles for Color Vision Deficiency Management

Roostaei

Hamidi

2022

ACS Appl. Nano Mater.

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Color vision deficiency (CVD), or color blindness, is a common ocular disorder that prohibits the recognition of different colors, from which many people suffer worldwide (8–10% of males and 0.4–0.5% of females). Despite numerous efforts, no definitive cure for color blindness has yet been discovered, but many color filter-based aids such as tinted glasses and contact lenses have been developed to help color blind people. This work is the first to fabricate plasmonic eyeglasses based on gold nanoparticles using two innovative methods, i.e., the simple self-assembly technique and heat treatment of gold thin films, and to evaluate them for color blindness management. The proposed plasmonic eyeglasses were simulated using the finite-difference time-domain (FDTD) method, and a good agreement between experimental and simulation results was obtained. The proposed plasmonic eyeglasses based on gold nanoparticles are more selective than commercial Enchroma and VINO glasses because of the tunability of plasmonic properties of gold NPs by controlling their morphology, which provides insights for applications of color vision deficiency improvement.

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Section: Experimental Methodsmentioning

confidence: 99%

Plasmonic Eyeglasses Based on Gold Nanoparticles for Color Vision Deficiency Management

Roostaei

Hamidi

2022

ACS Appl. Nano Mater.

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“…Over the last decades, various NMs have been biosynthesized, typically metallic [43,44], metalloid [45], oxides [46][47][48][49], carbonates [50,51], and chalcogenide [52,53]. On the other hand, countless studies have reported the biosynthesis of NMs using various biological entities [54,55], such as bacteria and actinomycetes [10,56,57], fungi and yeast [10,[58][59][60][61], plant extracts [62,63], algae [64,65], viruses [66], and biomolecules [67][68][69].…”

Section: Biosynthesis Of Sulfur-based Nanoparticlesmentioning

confidence: 99%

Biogenic Sulfur-Based Chalcogenide Nanocrystals: Methods of Fabrication, Mechanistic Aspects, and Bio-Applications

et al. 2022

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Bio-nanotechnology has emerged as an efficient and competitive methodology for the production of added-value nanomaterials (NMs). This review article gathers knowledge gleaned from the literature regarding the biosynthesis of sulfur-based chalcogenide nanoparticles (S-NPs), such as CdS, ZnS and PbS NPs, using various biological resources, namely bacteria, fungi including yeast, algae, plant extracts, single biomolecules, and viruses. In addition, this work sheds light onto the hypothetical mechanistic aspects, and discusses the impact of varying the experimental parameters, such as the employed bio-entity, time, pH, and biomass concentration, on the obtained S-NPs and, consequently, on their properties. Furthermore, various bio-applications of these NMs are described. Finally, key elements regarding the whole process are summed up and some hints are provided to overcome encountered bottlenecks towards the improved and scalable production of biogenic S-NPs.

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“…It was reported that ultrasonic energy can reduce the metallic precursors to the metal nanoparticles in the organic or aqueous solution. 47 Consequently, the incorporation of the highly dispersed metal nanoparticles on h-BN or BNNT surface can be produced without any surfactant, surface modification of the support materials, and/or hydrogen treatment. More importantly, it is worthwhile to note that most other supported metal catalysts have been synthesized under hydrogen-flowing reducing conditions at high temperatures (i.e., 500−650 °C).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, theoretical calculations have proven that the M/h-BN and M/boron nitride nanotube (BNNT) catalysts (M = metal) can be applied to the CO oxidation reaction with high catalytic activity under various reaction temperatures. − The deposition of metal nanoparticles can be commenced in the presence of reducing agents via sonication or simple stirring. − In fact, sonication itself triggers the formation of metal nanoparticles with a fine particle size. It was reported that ultrasonic energy can reduce the metallic precursors to the metal nanoparticles in the organic or aqueous solution . Consequently, the incorporation of the highly dispersed metal nanoparticles on h-BN or BNNT surface can be produced without any surfactant, surface modification of the support materials, and/or hydrogen treatment.…”

Section: Introductionmentioning

confidence: 99%

Noble Metal Nanoparticles Decorated Boron Nitride Nanotubes for Efficient and Selective Low-Temperature Catalytic Reduction of Nitric Oxide with Carbon Monoxide

Choi¹,

Yadav²,

Jung³

et al. 2023

ACS Appl. Mater. Interfaces

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Parallel to CO2 emission, NO x emission has become one of the menacing problems that seek a simple, durable, and high-efficiency deNO x catalyst. Herein, we demonstrated simple syntheses of platinum group metal nanoparticle-decorated f-BNNT (PGM = Pd, Pt, and Rh, and f-BNNT stands for −OH-functionalized boron nitride nanotubes) as a catalyst for efficient and selective reduction of NO by CO at low-temperature conditions. PGM/f-BNNT with a low amount of noble metal nanoparticles (0.7–0.8 wt %) presents very efficient catalytic activity for NO reduction as well as CO oxidation during their removal process. The removal efficiencies of NO and CO with Pd/f-BNNT, Pt/f-BNNT, and Rh/f-BNNT catalysts were investigated under various temperatures, flow rates, and reaction times, respectively. For most cases, NO catalytic reduction with CO reaction was >99% at a temperature as low as ∼200 °C. The catalyst robustness and efficiency were also verified by presenting almost 100% conversion of NO using a Rh/f-BNNT catalyst, which was aged under humid air at 600 and 700 °C for 24 h, respectively. The synergic effect of the catalytic efficacy of the well-dispersed noble metal nanoparticles and the excellent surface properties of BNNT are reasons for the high selectivity and catalytic property at a low temperature. On the basis of this investigation, we demonstrated that the noble metal nanoparticle-decorated f-BNNT catalysts are possible to save expensive PGM catalysts, such as Pt, Pd, and Rd, as much as 100 times while presenting similar or better catalytic performance for simultaneous NO and CO removals.

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Sonochemical synthesis of porous gold nano- and microparticles in a Rosette cell

Cited by 6 publications

References 48 publications

Plasmonic Eyeglasses Based on Gold Nanoparticles for Color Vision Deficiency Management

Plasmonic Eyeglasses Based on Gold Nanoparticles for Color Vision Deficiency Management

Biogenic Sulfur-Based Chalcogenide Nanocrystals: Methods of Fabrication, Mechanistic Aspects, and Bio-Applications

Noble Metal Nanoparticles Decorated Boron Nitride Nanotubes for Efficient and Selective Low-Temperature Catalytic Reduction of Nitric Oxide with Carbon Monoxide

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