Cubic or monoclinic Y2O3:Eu3+ nanoparticles by one step flame spray pyrolysis

Camenzind, Adrian; Strobel, Reto; Pratsinis, Sotiris E.

doi:10.1016/j.cplett.2005.09.002

Cited by 116 publications

(112 citation statements)

References 22 publications

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“…Similart rends werep reviously observed for flame-made SnO 2 and Y 2 O 3 nanoparticles. [21,26] To evaluate the water oxidation activity of similarly-shaped manganese polymorphs, the as-prepared ). This is slightly different from peaks of Mn 5 O 8 reported by Gillot et al, [28] which againm ay be ar esult of different nanoparticle size and lattice disorder.…”

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confidence: 99%

Scalable Synthesis of Efficient Water Oxidation Catalysts: Insights into the Activity of Flame‐Made Manganese Oxide Nanocrystals

et al. 2015

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Chemical energy storage by water splitting is a promising solution for the utilization of renewable energy in numerous currently impracticable needs, such as transportation and high temperature processing. Here, the synthesis of efficient ultra-fine Mn3O4 water oxidation catalysts with tunable specific surface area is demonstrated by a scalable one-step flame-synthesis process. The water oxidation performance of these flame-made structures is compared with pure Mn2O3 and Mn5O8, obtained by post-calcination of as-prepared Mn3O4 (115 m(2) g(-1)), and commercial iso-structural polymorphs, probing the effect of the manganese oxidation state and synthetic route. The structural properties of the manganese oxide nanoparticles were investigated by XRD, FTIR, high-resolution TEM, and XPS. It is found that these flame-made nanostructures have substantially higher activity, reaching up to 350 % higher surface-specific turnover frequency (0.07 μmolO2 m(-2) s(-1)) than commercial nanocrystals (0.02 μmolO2 m(-2) s(-1)), and production of up to 0.33 mmolO2 molMn (-1) s(-1). Electrochemical characterization confirmed the high water oxidation activity of these catalysts with an initial current density of 10 mA cm(-2) achieved with overpotentials between 0.35 and 0.50 V in 1 m NaOH electrolyte.

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confidence: 99%

Scalable Synthesis of Efficient Water Oxidation Catalysts: Insights into the Activity of Flame‐Made Manganese Oxide Nanocrystals

et al. 2015

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“…Typical production conditions lead to particles in the 20-50 nm size range, as determined by X-ray diffraction (Osterwalder et al, 2007), while airborne particle concentrations peak at 160-185 nm. The flame temperature was then altered from a low-temperature 3/7 flame to a hot 5/5 flame (Camenzind et al, 2005), resulting in smaller particles. The resulting size distributions of the airborne particles in Laboratory A displayed higher instability.…”

Section: Size Distributionmentioning

confidence: 99%

Particle Emission and Exposure during Nanoparticle Synthesis in Research Laboratories

2009

The Annals of Occupational Hygiene

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Real-time size, mass and number particle concentrations, and emission rates in university laboratories producing nanoparticles by scalable flame spray pyrolysis are quantified. Measurements were conducted in four laboratories using various technological set-ups and during production of particles of a range of compositions with differing physical-chemical properties, from NaCl salt, BiPO 4 , CaSO 4 , Bi 2 O 3 , insoluble TiO 2 , SiO 2 , and WO 3 to composites such as Cu/ZnO, Cu/SiO 2 , Cu/ZrO 2 , Ta 2 O 5 /SiO 2 , and Pt/Ba/Al 2 O 3 . Production time ranged from 0.25 to 400 min and yields from 0.33 to 183 g. Temporal and spatial analyses of the particle concentrations were performed indicating that elevated number concentrations in the workplace can occur. Airborne submicron number concentrations increased from background levels of 2100 up to 106 000 cm 23 during production, while the mass concentration ranged from a background of 0.009 to 0.463 mg m 23. Maximum particle number emission rates amounted to 1.17 3 10 12 min 21. The size distributions displayed concentration peaks mainly between 110 and 180 nm. However, changes in the operating conditions and the production of certain nanoparticles resulted in concentration peaks in the nanoparticle size range <100 nm. The effectiveness and limitations of current technology in assessing researchers' exposure to nanoparticles during production are examined, and further measures for workers' protection are proposed.

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“…Nevertheless, the capacity of flame spray aerosol reactors (Figure 5), in particular, to form new materials, nanothin hermetically layered particles (Teleki et al, 2008;Phillips et al, 2009;Guo et al, 2010), and even highly porous (98%) nanostructured semiconducting micropatterns on electronic circuitry (Tricoli et al, 2008) creates the opportunity to make products with new properties and functionalities. These products include catalysts (Strobel et al, 2006b), sensors , transparent but radiopaque dental prosthetics (Schulz et al, 2005), phosphor particles (Camenzind et al, 2005;Purwanto et al, 2008) and films (Kubrin et al, 2010), lithium-ion battery materials Ernst et al, 2007), nutritional supplements (Rohner et al, 2007) with rigorous physiological evaluation (Hilty et al, 2010), anti-fogging films made by in situ grown silica nanowires (Tricoli et al, 2009), and even highly durable sorbents for CO 2 sequestration (Lu et al, 2009). Thus, some of these products may soon appear on the market.…”

Section: Discussionmentioning

confidence: 99%

Aerosol Science and Technology: History and Reviews

Ensor¹

2011

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Aerosol Science and Technology: History and Reviews captures an exciting slice of history in the evolution of aerosol science. It presents in-depth biographies of four leading international aerosol researchers and highlights pivotal research institutions in New York, Minnesota, and Austria. One collection of chapters reflects on the legacy of the Pasadena smog experiment, while another presents a fascinating overview of military applications and nuclear aerosols. Finally, prominent researchers offer detailed reviews of aerosol measurement, processes, experiments, and technology that changed the face of aerosol science. This volume is the third in a series and is supported by the American Association for Aerosol Research (AAAR) History Working Group, whose goal is to produce archival books from its symposiums on the history of aerosol science to ensure a lasting record. It is based on papers presented at the Third Aerosol History Symposium on September 8 and 9, 2006, in St. Paul, Minnesota, USA.

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Cubic or monoclinic Y2O3:Eu3+ nanoparticles by one step flame spray pyrolysis

Cited by 116 publications

References 22 publications

Scalable Synthesis of Efficient Water Oxidation Catalysts: Insights into the Activity of Flame‐Made Manganese Oxide Nanocrystals

Scalable Synthesis of Efficient Water Oxidation Catalysts: Insights into the Activity of Flame‐Made Manganese Oxide Nanocrystals

Particle Emission and Exposure during Nanoparticle Synthesis in Research Laboratories

Aerosol Science and Technology: History and Reviews

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