The Experts below are selected from a list of 117 Experts worldwide ranked by ideXlab platform
Bijan Das - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic and interfacial adsorption studies on the micellar solutions of alkyltrimethylammonium bromides in Ethylene Glycol 1 water 2 mixed solvent media
Journal of Chemical & Engineering Data, 2009Co-Authors: Chanchal Das, Bijan DasAbstract:Micellization behavior of three alkyltrimethylammonium bromides, viz., hexadecyl-, tetradecyl-, and dodecyltrimethylammonium bromide (CTAB, TTAB, and DTAB, respectively) in Ethylene Glycol (EG) (1) + water (2) mixed solvent media with varying mass fractions of EG (w1) has been studied by means of electrical conductivity and surface tension measurements. Temperature dependence of the critical micelle concentrations was also investigated to understand the micellar thermodynamics of these systems. The mass action model of micelle formation was applied to obtain the thermodynamic parameters of micellization. Only small differences have been observed in the standard molar Gibbs energies of micellization over the temperature range investigated. The enthalpy of micellization was found to be negative in all cases, whereas the entropic contributions were always positive, indicating that an enthalpy−entropy compensation effect is the governing factor for micellization. Surface tension measurements also provide info...
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thermodynamic and interfacial adsorption studies on the micellar solutions of alkyltrimethylammonium bromides in Ethylene Glycol 1 water 2 mixed solvent media
Journal of Chemical & Engineering Data, 2009Co-Authors: Chanchal Das, Bijan DasAbstract:Micellization behavior of three alkyltrimethylammonium bromides, viz., hexadecyl-, tetradecyl-, and dodecyltrimethylammonium bromide (CTAB, TTAB, and DTAB, respectively) in Ethylene Glycol (EG) (1)...
Chanchal Das - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic and interfacial adsorption studies on the micellar solutions of alkyltrimethylammonium bromides in Ethylene Glycol 1 water 2 mixed solvent media
Journal of Chemical & Engineering Data, 2009Co-Authors: Chanchal Das, Bijan DasAbstract:Micellization behavior of three alkyltrimethylammonium bromides, viz., hexadecyl-, tetradecyl-, and dodecyltrimethylammonium bromide (CTAB, TTAB, and DTAB, respectively) in Ethylene Glycol (EG) (1) + water (2) mixed solvent media with varying mass fractions of EG (w1) has been studied by means of electrical conductivity and surface tension measurements. Temperature dependence of the critical micelle concentrations was also investigated to understand the micellar thermodynamics of these systems. The mass action model of micelle formation was applied to obtain the thermodynamic parameters of micellization. Only small differences have been observed in the standard molar Gibbs energies of micellization over the temperature range investigated. The enthalpy of micellization was found to be negative in all cases, whereas the entropic contributions were always positive, indicating that an enthalpy−entropy compensation effect is the governing factor for micellization. Surface tension measurements also provide info...
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thermodynamic and interfacial adsorption studies on the micellar solutions of alkyltrimethylammonium bromides in Ethylene Glycol 1 water 2 mixed solvent media
Journal of Chemical & Engineering Data, 2009Co-Authors: Chanchal Das, Bijan DasAbstract:Micellization behavior of three alkyltrimethylammonium bromides, viz., hexadecyl-, tetradecyl-, and dodecyltrimethylammonium bromide (CTAB, TTAB, and DTAB, respectively) in Ethylene Glycol (EG) (1)...
Hui Ding - One of the best experts on this subject based on the ideXlab platform.
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isobaric vapor liquid equilibria for the binary mixtures composed of Ethylene Glycol 1 2 propylene Glycol 1 2 butanediol and 1 3 butanediol at 10 00 kpa
Journal of Chemical & Engineering Data, 2013Co-Authors: Luhong Zhang, Yongli Sun, Bin Jiang, Na Yang, Hui DingAbstract:Isobaric vapor–liquid equilibria (VLE) data for the Ethylene Glycol + 1,2-propylene Glycol, 1,2-propylene Glycol + 1,3-butanediol, 1,2-propylene Glycol + 1,2-butanediol, and Ethylene Glycol + 1,3-butanediol binary systems have been measured at 10.00 kPa using a VLE recirculating still. The experimental VLE data were correlated with nonrandom two-liquid (NRTL), Wilson, and universal quasichemical (UNIQUAC) activity coefficient models. The results showed that the calculated values of the vapor-phase mole fraction and boiling temperature by the NRTL, Wilson, and UNIQUAC models agreed well with the experimental data. The experimental data were checked with the Herington consistency test and Van Ness test method, which also showed thermodynamic consistency.
Luhong Zhang - One of the best experts on this subject based on the ideXlab platform.
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isobaric vapor liquid equilibria for the binary mixtures composed of Ethylene Glycol 1 2 propylene Glycol 1 2 butanediol and 1 3 butanediol at 10 00 kpa
Journal of Chemical & Engineering Data, 2013Co-Authors: Luhong Zhang, Yongli Sun, Bin Jiang, Na Yang, Hui DingAbstract:Isobaric vapor–liquid equilibria (VLE) data for the Ethylene Glycol + 1,2-propylene Glycol, 1,2-propylene Glycol + 1,3-butanediol, 1,2-propylene Glycol + 1,2-butanediol, and Ethylene Glycol + 1,3-butanediol binary systems have been measured at 10.00 kPa using a VLE recirculating still. The experimental VLE data were correlated with nonrandom two-liquid (NRTL), Wilson, and universal quasichemical (UNIQUAC) activity coefficient models. The results showed that the calculated values of the vapor-phase mole fraction and boiling temperature by the NRTL, Wilson, and UNIQUAC models agreed well with the experimental data. The experimental data were checked with the Herington consistency test and Van Ness test method, which also showed thermodynamic consistency.
F. I. Danilov - One of the best experts on this subject based on the ideXlab platform.
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Application of a deep eutectic solvent to prepare nanocrystalline Ni and Ni/TiO2 coatings as electrocatalysts for the hydrogen evolution reaction
International Journal of Hydrogen Energy, 2019Co-Authors: V. S. Protsenko, D. A. Bogdanov, S.a. Korniy, A.a. Kityk, A. S. Baskevich, F. I. DanilovAbstract:Abstract The paper reports the electrochemical deposition of nanocrystalline nickel and composite nickel-titania films as effective electrocatalysts for the hydrogen evolution reaction. To produce the composite Ni/TiO2 electrodeposits, a plating bath based on a deep eutectic solvent, a novel kind of ionic liquids, was used for the first time. The electrolyte contained ethaline (a eutectic mixture of choline chloride and Ethylene Glycol), 1 M NiCl2⋅6H2O and the addition of extra water (3, 6, 9 mol dm−3). Titania dispersed phase was introduced into the electrolyte as nanopowder Degussa P 25 (0–10 g dm−3). It was shown that the introduction of extra water to the plating bath allowed appreciably increasing the content of TiO2 phase in the coating (from ca. 2 to 10 wt%). The effects of electrolysis conditions on the TiO2 content in the coatings, surface morphology and microstructure were determined. The results of voltammetry measurements showed that the Ni and composite Ni/TiO2 coatings electrodeposited from the plating electrolyte based on a deep eutectic solvent exhibit improved electrocatalytic properties towards the hydrogen evolution reaction as compared with deposits obtained from commonly used aqueous electrolytes. The mechanism of the hydrogen evolution reaction on the Ni and composite Ni/TiO2 coatings is a combination of Volmer-Heyrovsky reactions. The introduction of TiO2 particles into the nickel matrix results in the acceleration of the hydrogen evolution reaction. An improved catalytic activity of Ni/TiO2 composites towards the hydrogen evolution reaction can be associated with the presence of titanium-containing redox couples on the surface.