Powder XRD analysis and catalysis characterization of ultra-small gold nanoparticles deposited on titania-modified SBA-15

2005 ◽  
Vol 6 (6) ◽  
pp. 404-408 ◽  
Author(s):  
Wenfu Yan ◽  
Valeri Petkov ◽  
Shannon M. Mahurin ◽  
Steven H. Overbury ◽  
Sheng Dai
Keyword(s):  
Gold Nanoparticles ◽  
Xrd Analysis ◽  
Powder Xrd ◽  
Powder Xrd Analysis

Plutonium Pyrochemical Salts Oxidation Using Vanadium Oxide

1998 ◽  
Vol 547 ◽  
Author(s):  
Donna M. Smith ◽  
Mary P. Neu ◽  
Eduardo Garcia ◽  
Vonda R. Dole
Keyword(s):  
Vanadium Oxide ◽  
Xrd Analysis ◽  
Powder Xrd ◽  
Powder Xrd Analysis ◽  
Salt Matrix

AbstractThis paper presents results from the oxidation of PuCl3 with two-thirds, one, and two equivalents of V2O5 and the oxidation of Pu° with two and three equivalents of V2O5. All of the PuCl3 reactions were successful in that little or no starting materials remained and the major plutonium reaction product was PuO2. There is no evidence that V is reduced to V(II) or V°. According to powder XRD analysis, the bottom layers of all three reactions are identical, the middle layers contain different phases, and phases in the top layer of the oxidation with one equivalent of V2O5 is contained in the top layer from the oxidation with two-thirds equivalent of V2O5. The Pu° oxidations are more complex than the PuCl3 oxidations. More unreacted Pu° remains in the reaction using three equivalents of V2O5 than the reaction using two equivalents of V2O5. The lack of predictability of these reactions may be a result of the source of Pu° used in our experiments. The presence of soluble Pu(III) and the relative absence of PuO2 in all the Pu° reactions suggests V2O5 does not oxidize Pu° to Pu(IV) under these conditions. Chlorine is detected in the off-gas of the Pu° oxidations, indicating the salt matrix participates in the reaction.

scholarly journals Complex of Tris(Phenanthroline)Cobalt(II)Trifluoroacetate: Characterisation and Powder XRD Analysis

2019 ◽  
Vol 35 (5) ◽  
pp. 1500-1507
Author(s):  
Isana Supiah Yosephine Louise ◽  
Savetsilla Nabila ◽  
Kristian Handoyo Sugiyarto
Keyword(s):  
Aqueous Solution ◽  
Xrd Analysis ◽  
Electronic Configuration ◽  
Powder Xrd ◽  
Main Mode ◽  
Orbital Contribution ◽  
Triclinic Crystal System ◽  
Infrared Spectral ◽  
Powder Xrd Analysis ◽  
Sodium Trifluoroacetate

The powder complex of tris(phenanthroline)cobalt(II) trifluoroacetate (TFA) has been prepared by interaction of cobalt(II) nitrate, phenanthroline (phen) in aqueous solution with drops of ethanol, and an excess of saturated aqueous solution of sodium trifluoroacetate, whereupon the yellowish powder was produced. AAS measurment for the metal content, equivalent conductance (1:2), and TGA-DTA of the powder suggest the corresponding formula of [Co(phen)3](TFA)2.5H2O. The efffective magnetic moment of 4.9 BM indicates the high-spin nature of this complex which corresponds to three unpaired electrons in the electronic configuration of Co(II) with significantly higher than the spin only value due to the orbital contribution. UV-Vis spectrum of the complex reveals the d-d spin-allowed transition bands as well as the MLCT and intraligand band. The estimating transition energy ratio of 2.04 for ν2/ν1, is clearly in the range for octahedral configuration. The infrared spectral property indicates the main mode of vibrations for the functional groups of ligand phen and TFA, and thus supports strongly the formula proposed for this complex. The corresponding powder XRD was then refined using Rietica-Le Bail method and found to be fit as triclinic crystal system with space group of PĪ.

SYNTHESIS AND CHARACTERISATION OF Ba5Cu3Oy

1996 ◽  
Vol 10 (01n02) ◽  
pp. 29-30
Author(s):  
L.K. KALIYAPERUMAL ◽  
K. JEYABALAN
Keyword(s):  
Xrd Analysis ◽  
Lattice Parameters ◽  
Powder Xrd ◽  
Orthorhombic Structure ◽  
Powder Xrd Analysis

Synthesis and characterisation of Ba 5 Cu 3 O y compound is reported here. Powder XRD analysis shows that the system belongs to orthorhombic structure and the lattice parameters are a=8.664(8) Å, b=8.931(2) Å, c=9.072(9) Å.

scholarly journals Reusable Nanocatalyst: Zirconia and Sulfated Zirconia

2014 ◽  
Vol 36 ◽  
pp. 295-302
Author(s):  
Mitesh B. Gondaliya ◽  
Tushar Maheta ◽  
Mayank J. Mamtora ◽  
Manish K. Shah
Keyword(s):  
Sulfated Zirconia ◽  
Catalytic Amount ◽  
Xrd Analysis ◽  
Solvent Free ◽  
Powder Xrd ◽  
Microwave Method ◽  
Solvent Free Conditions ◽  
Powder Xrd Analysis ◽  
Ft Ir

1,5-benzodiazepines have been synthesized by Nano Zirconia and Nano Sulfated Zirconia in solvent free conditions. Synthesis was carried out by conventional as well as microwave method. Benzodiazepines were synthesized by reacting o-phenylenediamine and few ketones in the presence of catalytic amount of Nanoparticles. Particles used were sized in between 53-100 nm. Nanoparticles were characterized by FT-IR, DLS and powder XRD analysis.

Synthesis and Characterization of Hydroxyapatite Powder from Natural Bovine Bone

2014 ◽  
Vol 19 ◽  
pp. 35-42 ◽  
Author(s):  
Muhammad Wasim ◽  
Rameez Saeed Malik ◽  
Muhammad Usman Tufail ◽  
Ahsan Ullah Jutt ◽  
Rafiq Ahmad ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Xrd Analysis ◽  
Bovine Bone ◽  
X Ray Diffraction ◽  
Powder Xrd Analysis ◽  
Key Words Hydroxyapatite ◽  
Ft Ir ◽  
Ft Ir Spectroscopy ◽  
Additional Phase

Hydroxyapatite was synthesized from bovine cortical bone by thermal decomposition method. The chemically cleaned bone was heated to 160 °C for 48 hour to remove moisture and any organic contents followed by decomposition in muffle furnace at 850 °C for 6 hours. The so-obtained white powder was characterized by Fourier Transform Infrared (FT-IR) spectroscopy and X-Ray Diffraction (XRD), SEM and EDX method. The FT-IR results proved the existence of hydroxyl (OH-) and phosphate (PO4-3) groups in the powder. XRD analysis was in support to the FT-IR spectrum, however, an additional phase of tri-calcium phosphate (TCP) was also observed as an impurity, SEM shows the surface morphology & EDX gives the Calcium (Ca) to Phosphorous (P) ratio. Key Words: Hydroxyapatite; Thermal Decomposition, Calcination

Synthesis And Characterization Of Pillared Acid-Activated Montmorillonites

1991 ◽  
Vol 233 ◽  
Author(s):  
Robert Mokaya ◽  
William Jones ◽  
Mavis E. Whittle ◽  
Mary E. Davies
Keyword(s):  
Cation Exchange ◽  
Adsorption Capacity ◽  
Surface Acidity ◽  
Xrd Analysis ◽  
Pillared Clays ◽  
Synthesis And Characterization ◽  
Drying Method ◽  
Surface Areas ◽  
Powder Xrd Analysis

ABSTRACTPolymeric hydroxy-Al cations were introduced into the interlayer of acid-activated montmorillonites by cation exchange. The resulting pillared materials possessed layer spacings of 18 – 20 Å, surface areas between 250 – 320 m2/g, pore volumes in the range 0.3 – 0.38 cc/g and pore diameters in the range 32 – 40 Å depending on preparation procedures (i.e pillaring temperature and drying method). Powder XRD analysis indicated that the pillars formed were stable to temperatures above 500 °C. The surface acidity of these type of pillared clays was higher than that of pillared non-activated clays. Preliminary studies on their adsorption capacity for chlorophyll showed that they were superior to pillared non-activated clays.

Fabrication and Characterization of Chain-like Arrangement of Gold Nanoparticles using Nanotemplates

2015 ◽  
Vol 135 (11) ◽  
pp. 474-475
Author(s):  
Koji Sugano ◽  
Ryoji Hiraoka ◽  
Toshiyuki Tsuchiya ◽  
Osamu Tabata
Keyword(s):  
Gold Nanoparticles ◽  
Fabrication And Characterization
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