Synthesis and Characterization of Bismuth Nickel Tantalate Pyrochlore

2015 ◽  
Vol 749 ◽  
pp. 30-35 ◽  
Author(s):  
Asiah Abdullah ◽  
Wan Elina Faradilla Wan Khalid ◽  
Siti Zaubidah Abdullah
Keyword(s):  
Inductively Coupled Plasma ◽  
Single Phase ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
X Ray Diffraction ◽  
Plasma Atomic Emission Spectrometry ◽  
Inductively Coupled ◽  
Cubic System ◽  
Ft Ir ◽  
Single Phase Material

Bi3Ni2Ta3O14 pyrochlores and related materials were prepared by solid state reaction at sintering temperatures ranging from 900°C to 1150°C. The BNT cubic pyrochlores could be represented by a general formula Bi3Ni2-xTa3O14-x and phase pure sample was obtained at temperature 1050°C with x = 0.6. This was confirmed by X-ray diffraction analysis and detailed lattice refinement. The single phase material crystallized in a cubic system, space group Fd3m with a = b = c = 10.5134 Å, α = β = γ = 90o, respectively. The sample was further characterized using a combination of techniques including Fourier-Transform infrared spectroscopy (FT-IR), differential thermal analysis (DTA), thermogravimetric analysis (TGA) and inductively coupled plasma – atomic emission spectrometry (ICP-AES). The material was thermally stable without any thermal events being observed. Electrical properties of the single phase material were studied by ac impedance spectroscopy starting from room temperature to 800 oC over a frequency range of 5 Hz to 13 MHz. The phase formation and solid solutions of cubic pyrochlores in the Bi2O3-NiO-Ta2O5 (BNT) ternary system were studied thoroughly via combination of characterization techniques.

scholarly journals Influence of diatomite microstructure on its adsorption capacity for Pb(II)

2009 ◽  
Vol 41 (3) ◽  
pp. 309-317 ◽  
Author(s):  
S. Nenadovic ◽  
M. Nenadovic ◽  
R. Kovacevic ◽  
Lj. Matovic ◽  
B. Matovic ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
Wastewater Remediation ◽  
X Ray Diffraction ◽  
Plasma Atomic Emission Spectrometry ◽  
Force Microscopy ◽  
Inductively Coupled ◽  
Atomic Force ◽  
Treated Sample

The effect of microstructural changes caused by mechanical modification on adsorption properties of diatomite samples were investigated. The microstructure has been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM) while the degree of metal adsorption was evaluated by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP AES). The results show that metal sorption capacity of diatomite is considerably improved after mechanical modification and it can be attributed to amorphysation of the material. Immobilization efficiency increased from 22% for untreated to 81% for the treated sample after 5h at BPR 4.This qualifies natural diatomite as a material for wastewater remediation.

Microstructure and Electrochemical Properties of a LaMgAlMnCoNi Based Alloy for Ni/MH Batteries

2012 ◽  
Vol 727-728 ◽  
pp. 80-84 ◽  
Author(s):  
Eliner Affonso Ferreira ◽  
J.M. Serra ◽  
Julio César Serafim Casini ◽  
Hidetoshi Takiishi ◽  
Rubens Nunes de Faria Jr.
Keyword(s):  
Electrochemical Properties ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
X Ray Diffraction ◽  
Cast State ◽  
Plasma Atomic Emission Spectrometry ◽  
X Ray ◽  
Inductively Coupled ◽  
Type Test

The microstructure and electrochemical properties of a La0.7Mg0.3Al0.3Mn0.4Co0.5Ni3.8 hydrogen storage alloy have been studied. The anode was prepared using a mixture of the ingot alloy in the as-cast state with carbon black and polytetrafluoroethylene (PTFE) as a binder. A Ni (OH)2 electrode was used as the cathode of the square-type test cell. A separator was used together with a 6M KOH electrolyte. Microstructure and phase composition of the alloy have been investigated using inductively coupled plasma atomic emission spectrometry (ICP-AES), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray diffraction analysis (XRD). A niobium-containing alloy has also been included for a comparison.

Selective Oxidation of Cyclohexane to Cyclohexanone and Cyclohexanol over Au/Co3O4 Catalyst

2011 ◽  
Vol 284-286 ◽  
pp. 806-810
Author(s):  
Jun Wan ◽  
Jing Zhao ◽  
Ming Qiao Zhu ◽  
Huan Dai ◽  
Lei Wang
Keyword(s):  
Selective Oxidation ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Precipitation Method ◽  
Emission Spectrometry ◽  
X Ray Diffraction ◽  
Plasma Atomic Emission Spectrometry ◽  
Inductively Coupled ◽  
Transmission Electron ◽  
Co Precipitation

Au/Co3O4catalysts were prepared by a co-precipitation method and characterized by inductively coupled plasma-atomic emission spectrometry (ICP-AES), transmission electron microscope (TEM) and X-ray diffraction (XRD). The selective oxidation of cyclohexane to cyclohexanone and cyclohexanol was investigated over Au/Co3O4catalysts using molecular oxygen as oxidant. These catalysts showed higher activities as compared to the pure Co3O4under the same reaction conditions.

Heat Treatment and Microstructural Studies of LaNi-Type Battery Electrode Alloys

2017 ◽  
Vol 899 ◽  
pp. 366-370
Author(s):  
Eliner Affonso Ferreira ◽  
Lusinete Pereira Barbosa ◽  
Rubens Nunes de Faria Jr.
Keyword(s):  
Heat Treatment ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
Electrochemical Characteristics ◽  
X Ray Diffraction ◽  
Plasma Atomic Emission Spectrometry ◽  
X Ray ◽  
Inductively Coupled ◽  
Battery Electrode

The effects of annealing on the microstructures and electrochemical characteristics of a La0.7Mg0.3Al0.3Mn0.4Co0.5Ni3.8 hydrogen storage alloy have been studied. The heat treatment by vacuum annealing was carried out at 700 °C, 800 °C, 900 °C and 1000 °C. The microstructure and phase composition of the alloy have been investigated using inductively coupled plasma - atomic emission spectrometry (ICP-AES), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray diffraction analysis (XRD). The battery anode was prepared using a mixture of the pulverized alloy with carbon black and polytetrafluoroethylene as a binder.

scholarly journals Green synthesis of hydratropic aldehyde from α-methylstyrene catalyzed by Al2O3-supported metal phthalocyanines

2019 ◽  
Vol 8 (1) ◽  
pp. 100-107 ◽  
Author(s):  
Fanfan Niu ◽  
Ying Jiang ◽  
Ping Chen ◽  
Licheng Zhan ◽  
Xiaoling Sun
Keyword(s):  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
X Ray Diffraction ◽  
Plasma Atomic Emission Spectrometry ◽  
Metal Phthalocyanines ◽  
Inductively Coupled ◽  
Uv Visible ◽  
First Time ◽  
Supported Metal

Abstract This report presents a study of synthesis of hydratropic aldehyde from α-methylstyrene employing Al2O3-supported metal phthalocyanines as catalyst, molecular oxygen as oxidant and isobutyraldehyde as co-oxidant. The catalytic system was applied in the synthesis of hydratropic aldehyde for the first time. Under optimal conditions, the conversion of α-methylstyrene reached 99%, whereas the selectivity of hydratropic aldehyde reached 85.14%. Possible reaction mechanism and the effects of different factors on oxidation reaction were investigated. Aluminum oxide-supported metal (M = Co, Ni, and Fe) phthalocyanine catalysts (MPc/Al2O3) were prepared using the “ship-in-a-bottle” method by synthesizing metallophthalocyanines in support holes. Obtained catalysts were characterized by N2 adsorption, Brunauer-Emmett-Teller surface area (BET), inductively-coupled plasma atomic emission spectrometry (ICP-AES), IR, UV-Visible (UV-Vis), and X-ray diffraction (XRD).

Silicate analysis of carbonated rocks using ICP-AES with calibration by the concentration ratio

2020 ◽  
Vol 86 (5) ◽  
pp. 16-21
Author(s):  
T. A. Karimova ◽  
G. L. Buchbinder ◽  
S. V. Kachin
Keyword(s):  
Inductively Coupled Plasma ◽  
Concentration Ratio ◽  
Total Error ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
Calibration Error ◽  
Plasma Atomic Emission Spectrometry ◽  
Standard Samples ◽  
Inductively Coupled ◽  
Carbonate Materials

Calibration by the concentration ratio provides better metrological characteristics compared to other calibration modes when using the inductively coupled plasma atomic emission spectrometry (ICP-AES) for analysis of geological samples and technical materials on their base. The main reasons for the observed improvement are: i) elimination of the calibration error of measuring vessels and the error of weighing samples of the analyzed materials from the total error of the analysis; ii) high intensity of the lines of base element; and iii) higher accuracy of measuring the ratio of intensities compared to that of measuring the absolute intensities. Calcium oxide is better suited as a base when using calibration by the concentration ratio in analysis of carbonate rocks, technical materials, slags containing less than 20% SiO2 and more than 20% CaO. An equation is derived to calculate the content of components determined in carbonate materials when using calibration by the concentration ratio. A method of ICP-AES with calibration by the concentration ratio is developed for determination of CaO (in the range of contents 20 – 100%), SiO2 (2.0 – 35%), Al2O3 (0.1 – 30%), MgO (0.1 – 20%), Fe2O3 (0.5 – 40%), Na2O (0.1 – 15%), K2O (0.1 – 5%), P2O5 (0.001 – 2%), MnO (0.01 – 2%), TiO2 (0.01 – 2.0%) in various carbonate materials. Acid decomposition of the samples in closed vessels heated in a HotBlock 200 system is proposed. Correctness of the procedure is confirmed in analysis of standard samples of rocks. The developed procedure was used during the interlaboratory analysis of the standard sample of slag SH17 produced by ZAO ISO (Yekaterinburg, Russia).

Sign in / Sign up

Export Citation Format

Share Document