Liquid-phase diffusion coefficients for dissolved gases. Systems chlorine-carbon tetrachloride and hydrogen chloride-ethylene glycol

1973 ◽  
Vol 18 (1) ◽  
pp. 59-60 ◽  
Author(s):  
Geoffrey T. Clegg ◽  
M. Ahmadzadeh Tehrani
Keyword(s):  
Carbon Tetrachloride ◽  
Liquid Phase ◽  
Ethylene Glycol ◽  
Hydrogen Chloride ◽  
Diffusion Coefficients ◽  
Dissolved Gases ◽  
Phase Diffusion

Low-Temperature Liquid-Phase Synthesis and Electrochemical Activity of α-Nickel Hydroxide with Flower-Like Micro-/Nano-Structure

2011 ◽  
Vol 347-353 ◽  
pp. 3379-3383
Author(s):  
Zhi Wei Li ◽  
Xu Xiang ◽  
Zong Min Tian
Keyword(s):  
Liquid Phase ◽  
Low Temperature ◽  
Ethylene Glycol ◽  
Nickel Hydroxide ◽  
Variable Temperature ◽  
Mixed Solvents ◽  
Reaction Medium ◽  
Electrochemical Activity ◽  
Nano Structure ◽  
Pure Phase

The synthesis of α-nickel hydroxide has been achieved via a facile liquid-phase precipitation approach, using the mixed solvents of ethylene glycol and water as reaction medium at low temperature. The XRD characterization indicates that pure phase α-Ni(OH)2can be obtained under variable temperature and pH value. The products present a flower-like micro-/nano-structure assembled with curved nanosheets. The nanosheets have the width of 100~500 nm and the thickness of 20~70 nm. The cavities are formed in the structure due to the interconnection of curved nanosheets. The solvents play a key role in the formation of Ni(OH)2with different forms. Pure phase α-Ni(OH)2can only be synthesized in the mixed solvents of ethylene glycol and water. Cyclic voltammetry was applied to test the electrochemical activity of the as-synthesized α-Ni(OH)2. The findings suggest that the α-Ni(OH)2with a micro-/nano-structure exhibits excellent electrochemical activity, which may be considered as a promising candidate of electrode material.

Diffusion of Methane and Chloromethanes in Air

1971 ◽  
Vol 49 (1) ◽  
pp. 74-77 ◽  
Author(s):  
M. Cowie ◽  
Harry Watts
Keyword(s):  
Carbon Tetrachloride ◽  
Diffusion Coefficients ◽  
Methylene Chloride ◽  
Methyl Chloride ◽  
Diffusion Cell ◽  
Infrared Spectrophotometry ◽  
Gaseous Diffusion ◽  
Simple Diffusion ◽  
Concentration Changes

The binary gaseous diffusion coefficients of air with methane, methyl chloride, methylene chloride, chloroform, and carbon tetrachloride at 298.2 °K and 1 atm have been determined. A simple diffusion cell was used, in which concentration changes of the diffusing gas were followed by infrared spectrophotometry.

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