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Analysis of cobalt, tantalum, titanium, vanadium and chromium in tungsten carbide by inductively coupled plasma-optical emission spectrometry

Author: Archer, M ; McCrindle, RI ; Rohwer, ER Date: Dec 2003 Inductively coupled plasma optical emission spectroscopy (ICP-OES) was used to measure the concentrations of cobalt, tantalum, titanium, vanadium and chromium in solutions of tungsten carbide. The main advantage of the method described here ... Read more
Calcined magnesite as an adsorbent for cationic and anionic dyes: characterization, adsorption parameters, isotherms and kinetics study

Author: Ngulube, T ; Gumbo, JR ; Masindi, Vhahangwele ; Maity, Arjun Date: Oct 2018 The ability of calcined magnesite for Methylene Blue (MB), Direct Red 81 (DR81), Methyl Orange (MO) and Crystal Violet (CV) dye removal was evaluated in this study. The experiments were designed to test the hypothesis that alkaline earth ... Read more
The effect of reducing agents on the electronic, magnetic and electrocatalytic properties of thiol-capped Pt/Co and Pt/Ni nanoparticles

Author: Mathe, Ntombizodwa R ; Nkosi, SS ; Motaung, DE ; Scriba, Manfred R ; Coville, NJ Date: May 2015 The electronic, magnetic and electrocatalytic properties of bimetallic thiol-capped Pt/Co and Pt/Ni nanoparticles were synthesised using two reducing agents, NaBH(sub4) and N(sub2)H(sub4). X-ray diffraction analysis of the nanoparticles showed ... Read more
Excess molar volumes of (an alkanol plus a branched chain ether) at the temperature 298.15 K and the application of the ERAS model

Author: Letcher, TM ; Govender, PU Date: Dec 1997 The excess molar volumes V-m(E) {x(CH3OH or CH3CH2OH or CH3(CH2)(2)OH or CH3CH(OH)CH3 + (1 - x)(CH3(CH2)(2)}(2)O or CH3C(CH3)(2)OCH3 or CH3CH2C(CH3)(2)OCH3} have been calculated from measured values of density over the whole composition range ... Read more
Novel family of solid acid catalysts: substantially amorphous or partially crystalline zeolitic materials

Author: Nicolaides, CP Date: 1999 Hydrogels, typically used for the synthesis of highly crystalline ZSM-5 samples at 150 degrees C and under autogenous pressure, were subjected to lower hydrothermal synthesis temperatures, i.e., from 25 degrees C to 130 degrees C. XRD analysis ... Read more
Synthesis of lithium-manganese-oxide spinels: A study by thermal analysis

Author: Thackeray, MM ; Rossouw, MH Date: Dec 1994 The synthesis of lithium-manganese-oxide spinels by reaction of Li2CO3 and MnCO3 in air and under nitrogen to T(max) = 600°C has been investigated by thermogravimetric analysis and differential scanning calorimetry. When the reaction is ... Read more
Thermodynamic assessment of the Al-Ru system

Author: Prins, SN ; Cornish, LA ; Stumpf, WE ; Sundman, B Date: Mar 2003 The CALPHAD technique was used to calculate the Al-Ru binary phase diagram. The RuAl (B2) phase was described with the sublattice model (SL), also designated Compound Energy Formalism (CEF), as well as the Modified Sublattice Formalism (MSL), ... Read more

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Browsing by Subject "Physical chemistry"

Browsing by Subject "Physical chemistry"

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