X-ray studies on NiAl–Cr3C2–Al2O3 composite powder with nanocrystalline NiAl phase

Dercz, Grzegorz; Prusik, Krystian; Pająk, L.; Goryczka, Tomasz; Formanek, B.

doi:10.1016/j.jallcom.2005.12.044

Cited by 12 publications

(9 citation statements)

References 19 publications

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“…It also confirms that ultra-pure Pt NPs in the sub-5 nm range and with a narrow size distribution can be obtained without the use of any size-controlling agent. [20] The calculated values of the lattice parameters were 0.39196(2) and 0.39185(2) nm for nanoPt and nanoPtA C H T U N G T R E N N U N G (PVP), respectively, whereas from the PDF-2 card (ICDD PDF 00-004-0802) it was 0.39231 nm. Figure 2 shows the XRD patterns of samples of nanoPt and nanoPtA C H T U N G T R E N N U N G (PVP) registered in classical Bragg-Brentano (B-B) geometry.…”

Section: Resultsmentioning

confidence: 93%

Outstanding Catalytic Activity of Ultra‐Pure Platinum Nanoparticles

Januszewska

Dercz

Piwowar

et al. 2013

Chemistry A European J

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Small (4 nm) nanoparticles with a narrow size distribution, exceptional surface purity, and increased surface order, which exhibits itself as an increased presence of basal crystallographic planes, can be obtained without the use of any surfactant. These nanoparticles can be used in many applications in an as-received state and are threefold more active towards a model catalytic reaction (oxidation of ethylene glycol). Furthermore, the superior properties of this material are interesting not only due to the increase in their intrinsic catalytic activity, but also due to the exceptional surface purity itself. The nanoparticles can be used directly (i.e., as-received, without any cleaning steps) in biomedical applications (i.e., as more efficient drug carriers due to an increased number of adsorption sites) and in energy-harvesting/data-storage devices.

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Section: Resultsmentioning

confidence: 93%

Outstanding Catalytic Activity of Ultra‐Pure Platinum Nanoparticles

Januszewska

Dercz

Piwowar

et al. 2013

Chemistry A European J

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“…Commercially available monoclinic zirconia (ZrO 2 ) m powder and sulfated tetragonal ZrO 2 catalyst support (S-ZrO 2 ) t were tested, and the XRD patterns correlate very well with what has been reported in the literature. 41,42 Both bulk materials have sharp peaks in their XRD patterns, indicating large particle size. Amorphous ZrO 2 does not exhibit diffraction peaks but can be thermally converted to ordered structures.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Nanocomposites with Strong Interfacial Interaction: Sulfated ZrO₂ Nanoparticles Supported on Multiwalled Carbon Nanotubes

Liu

Lee

et al. 2012

J. Phys. Chem. C

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We discuss the synthesis of a composite of ZrO 2 nanoparticles supported on multiwalled carbon nanotubes (MWCNT). Using X-ray diffraction and high-resolution transmission electron microscopy (HR-TEM), the ZrO 2 were found to be 2−3 nm tetragonal crystalline nanoparticles. Strong interfacial interaction between the ZrO 2 nanoparticles and the MWCNT surface was observed by near-edge X-ray absorption fine structure spectroscopy (NEXAFS) at the carbon K-edge and the oxygen K-edge, and this strong metal oxide/support interaction leads to small ZrO 2 particle size and thermal stability. The ZrO 2 /MWCNT was converted into a solid acid catalyst by sulfation, and the properties of S-ZrO 2 / MWCNT were studied. The nature of the acid sites was probed by S K-edge and Zr L-edges (L 3 , L 2 , L 1 ) XANES as well as catalytic probe reaction of cyclohexane dehydrogenation/cracking. Such composites would be good candidates for potential catalysis applications in fuel cell electrodes and biomass processing.

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“…The powder morphology was analyzed by SEM and TEM techniques. The above methods are standard ones in the studies of nanocrystalline materials [15][16][17].…”

Section: Methodsmentioning

confidence: 99%

Structural Studies with the Use of XRD and Mössbauer Spectroscopy οf Bi₅Ti₃FeO₁₅Ceramic Powders Obtained by Mechanical Synthesis

et al. 2008

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In this paper the structural and Mössbauer spectral properties of multiferroic ceramic Bi5Ti3FeO15 powders prepared by high-energy ball milling of polycrystalline precursor material (mixture of Bi 2 O 3 , TiO 2 and Fe 2 O 3 powders) are presented. Mechanical synthesis was performed by high-energy vibratory mill. The X-ray diffraction methods were applied for the structure characterization of the studied samples. The parameters of diffraction line profiles were determined by PRO-FIT Toraya procedure. The crystallite sizes and lattice distortions were analyzed using the Williamson-Hall method. Investigations of hyperfine interactions in the studied materials were carried out by the Mössbauer spectroscopy. The powder morphology was analyzed by scanning electron microscopy and transmission electron microscopy techniques. It was found that during high-energy milling phase transitions, a decrease in crystallite size and amorphization process are observed.

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X-ray studies on NiAl–Cr3C2–Al2O3 composite powder with nanocrystalline NiAl phase

Cited by 12 publications

References 19 publications

Outstanding Catalytic Activity of Ultra‐Pure Platinum Nanoparticles

Outstanding Catalytic Activity of Ultra‐Pure Platinum Nanoparticles

Synthesis and Characterization of Nanocomposites with Strong Interfacial Interaction: Sulfated ZrO₂ Nanoparticles Supported on Multiwalled Carbon Nanotubes

Structural Studies with the Use of XRD and Mössbauer Spectroscopy οf Bi₅Ti₃FeO₁₅Ceramic Powders Obtained by Mechanical Synthesis

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X-ray studies on NiAl–Cr3C2–Al2O3 composite powder with nanocrystalline NiAl phase

Cited by 12 publications

References 19 publications

Outstanding Catalytic Activity of Ultra‐Pure Platinum Nanoparticles

Outstanding Catalytic Activity of Ultra‐Pure Platinum Nanoparticles

Synthesis and Characterization of Nanocomposites with Strong Interfacial Interaction: Sulfated ZrO2 Nanoparticles Supported on Multiwalled Carbon Nanotubes

Structural Studies with the Use of XRD and Mössbauer Spectroscopy οf Bi5Ti3FeO15Ceramic Powders Obtained by Mechanical Synthesis

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Product

Resources

About

Synthesis and Characterization of Nanocomposites with Strong Interfacial Interaction: Sulfated ZrO₂ Nanoparticles Supported on Multiwalled Carbon Nanotubes

Structural Studies with the Use of XRD and Mössbauer Spectroscopy οf Bi₅Ti₃FeO₁₅Ceramic Powders Obtained by Mechanical Synthesis