Sonochemically synthesized core-shell structured Au–Pd nanoparticles supported on γ-Fe2O3 particles

Nitani, Hiroaki; Yuya, Masato; Ono, Takahiro; Nakagawa, Takashi; Seino, Satoshi; Okitsu, Kenji; Mizukoshi, Yoshiteru; Emura, S.; Yamamoto, Takao A.

doi:10.1007/s11051-005-9048-3

Cited by 23 publications

(18 citation statements)

References 16 publications

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“…However, these methods require high temperatures (over 200 °C) and cannot be applied to ABS, which has low heat resistance (less than 100 °C). In a further method, sonolytic synthesis reduces the metal ions in an aqueous solution via irradiation with ultrasound [ 9 , 10 , 11 , 12 ]. Although this method has a working temperature of less than 30 °C, the ultrasonic energy is absorbed via the ABS container, leading to nonuniform reduction and deposition of the metal ions.…”

Section: Introductionmentioning

confidence: 99%

Radiolytic Synthesis of Pt-Particle/ABS Catalysts for H2O2 Decomposition in Contact Lens Cleaning

et al. 2017

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A container used in contact lens cleaning requires a Pt plating weight of 1.5 mg for H2O2 decomposition although Pt is an expensive material. Techniques that decrease the amount of Pt are therefore needed. In this study, Pt nanoparticles instead of Pt plating film were supported on a substrate of acrylonitrile–butadiene–styrene copolymer (ABS). This was achieved by the reduction of Pt ions in an aqueous solution containing the ABS substrate using high-energy electron-beam irradiation. Pt nanoparticles supported on the ABS substrate (Pt-particle/ABS) had a size of 4–10 nm. The amount of Pt required for Pt-particle/ABS was 250 times less than that required for an ABS substrate covered with Pt plating film (Pt-film/ABS). The catalytic activity for H2O2 decomposition was estimated by measuring the residual H2O2 concentration after immersing the catalyst for 360 min. The Pt-particle/ABS catalyst had a considerably higher specific catalytic activity for H2O2 decomposition than the Pt-film/ABS catalyst. In addition, sterilization performance was estimated from the initial rate of H2O2 decomposition over 60 min. The Pt-particle/ABS catalyst demonstrated a better sterilization performance than the Pt-film/ABS catalyst. The difference between Pt-particle/ABS and Pt-film/ABS was shown to reflect the size of the O2 bubbles formed during H2O2 decomposition.

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Section: Introductionmentioning

confidence: 99%

Radiolytic Synthesis of Pt-Particle/ABS Catalysts for H2O2 Decomposition in Contact Lens Cleaning

et al. 2017

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“…The implosive collapse of bubble generates localized hot spots through the adiabatic compression or shock wave formation within the gas phase of the collapsing bubble which is very useful in synthesizing the novel nanometric materials. [23][24] The easier availability of accessories, effortless preparation, less time consumption and affordable cost promote the competence of sonication chemistry further. Highly crystalline ZnO nanospheres were synthesized with the aid of sonochemical method.…”

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confidence: 99%

Synthesis, Structural Characterization, and Catalytic Activity of Flower Like ZnO Nanostructures

Ramachandran¹,

kumar

Kim³

et al. 2014

Bulletin of the Korean Chemical Society

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Tageteserecta flower like zinc oxide nanostructures composed of hexagonal nanorods were synthesized via sonochemical method at room temperature. The synthesized nanomaterials exhibited wurtzite hexagonal phase structure with the single crystalline nature. The diameter of the individual nanorods that constitute the flower shaped zinc oxide structures is in the range of 120-160 nm. The sonication time effectively determined the morphological properties of the prepared materials. The catalytic activity of prepared zinc oxide nanostructures towards N-formylation reactions were evaluated without any surface modification and the nanostructures exhibited good reaction yield with the prompt recyclability behavior.

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“…2 shows a HRTEM image of an individual particle corresponding to Pt-Ir co-deposition. Despite Ir and Pt lattice parameters are too close, the (−1 −1 1), (1 1 1) and (0 0 2) planes, corresponding to the fcc crystal structure of Pt (JCPDS 04-0802), were satisfactorily identified at the particle centre, however, the lattice distortion at the edges might be associated with the presence of Ir, implying a substructured bimetallic particle [18]. Fig.…”

Section: Resultsmentioning

confidence: 94%

Preparation of platinum-iridium nanoparticles on titania nanotubes by MOCVD and their catalytic evaluation

Colindres¹,

Vargas-Garcı́a²,

Toledo-Antonio³

et al. 2009

Journal of Alloys and Compounds

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Sonochemically synthesized core-shell structured Au–Pd nanoparticles supported on γ-Fe2O3 particles

Cited by 23 publications

References 16 publications

Radiolytic Synthesis of Pt-Particle/ABS Catalysts for H2O2 Decomposition in Contact Lens Cleaning

Radiolytic Synthesis of Pt-Particle/ABS Catalysts for H2O2 Decomposition in Contact Lens Cleaning

Synthesis, Structural Characterization, and Catalytic Activity of Flower Like ZnO Nanostructures

Preparation of platinum-iridium nanoparticles on titania nanotubes by MOCVD and their catalytic evaluation

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