Boundary layers between silver iodide and aqueous solutions at low temperatures

1970 ◽  
Vol 1 ◽  
pp. 148 ◽  
Author(s):  
B. Vincent ◽  
J. Lyklema
Keyword(s):  
Aqueous Solutions ◽  
Boundary Layers ◽  
Low Temperatures ◽  
Silver Iodide

Redox reaction mediated direct synthesis of hierarchical flower-like CuO spheres anchored on electrospun poly(vinylidene difluoride) fiber surfaces at low temperatures

RSC Advances ◽  
2015 ◽  
Vol 5 (121) ◽  
pp. 100228-100234 ◽  
Author(s):  
Yun-Yang Lee ◽  
Hsieh-Yu Li ◽  
Shih-Jiuan Chiu ◽  
Wen-Li Liang ◽  
Pi-Li Yeh ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Rhodamine B ◽  
Redox Reaction ◽  
Low Temperatures ◽  
Direct Synthesis ◽  
Catalytic Membranes ◽  
Vinylidene Difluoride

Flower-like CuO spheres anchored on electrospun PVDF fiber surfaces as catalytic membranes for the photodegradation of rhodamine B aqueous solutions.

Thermodynamic studies of some non-electrolytes in aqueous solutions at low temperatures

2008 ◽  
Vol 40 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Sudhakar S. Dhondge ◽  
Chandrashekhar Pandhurnekar ◽  
L. Ramesh
Keyword(s):  
Aqueous Solutions ◽  
Low Temperatures ◽  
Thermodynamic Studies

scholarly journals The growth of silver iodide films

1929 ◽  
Vol 125 (797) ◽  
pp. 370-394 ◽  
Keyword(s):  
Parabolic Equation ◽  
Gas Phase ◽  
Low Temperatures ◽  
Silver Iodide ◽  
Film Growth ◽  
Oxide Films ◽  
Gravimetric Method ◽  
Instructive Case ◽  
At Will ◽  
Iodide Film

It is now well established that a large class of important chemical reactions is controlled by the growth of obstructive films, but our knowledge of the mechanism of the growth of such films—especially at low temperatures—is still very imperfect. The present paper describes a detailed study of a particularly instructive case of film-growth, the action of iodine on silver; this reaction was chosen because silver iodide films—in contrast with oxide films—reach visible thickness rapidly at ordinary temperatures. The optical properties of these films have already been studied by Wernick, whilst much information regarding the velocity of film-growth has been obtained by Tammanm by Kohlschutter and Krahenbiihl, and by Hartung. Tammann used the interference colour as the means of arriving at the thickness of the film; this method has certain unique advantages, but the more recent work of Tammann and Bockow has indicated that—in the case of oxide-films at least—the particular form of the method employed gives values for the thickness differing widely from those obtained by the gravimetric method. Tammann expressed the relation between the thickness ( y ) and the time ( t ) by the parabolic equation y 2 = 2 pt , where p is a. constant. Kohlschütter and Krähenbiihl, and also Hartung, used microgravimetric methods to determine the amount of iodine taken up, and obtained curves connecting thickness and time ; these curves do not appear to follow the parabolic equation. All the experimenters mentioned used iodine vapour to attack the silver, but the concentration of iodine in the gas phase was not directly determined. In all cases the surfaces were prepared in air, and the possible effect of exposure to oxygen was not considered; yet in several of the reactions of copper and iron, pre-exposure to air or oxygen is known greatly to modify the result, owing to the fact that an oxide-film may become protective before reaching the thickness needed for interference colours. It may be mentioned that after exposure to vapour, the colour produced on metallic specimens is usually not uniform, but indicates a greater film-thickness near the edge. In the present research, it was decided to use a solution of iodine in an organic solvent; in this case, the concentration could be fixed or varied at will, and in general uniform colouration (indicating uniform thickness) could be obtained. Moreover, abrasion could be conducted, if required, below the surface of the solvent, instead of in air. Chloroform was .found to be a suitable liquid, since, whilst freely dissolving iodine, it had no appreciable solvent action on a silver iodide film.

scholarly journals Dissolution of cellulose using a combination of hydroxide bases in aqueous solution

Cellulose ◽  
2019 ◽  
Vol 27 (1) ◽  
pp. 101-112 ◽  
Author(s):  
Beatrice Swensson ◽  
Anette Larsson ◽  
Merima Hasani
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Microcrystalline Cellulose ◽  
Low Temperatures ◽  
Dynamic Rheology ◽  
Organic Base ◽  
Single Base ◽  
Solvent Quality ◽  
Solvent Stability

Abstract In order to further understand the role of the cation when dissolving cellulose in aqueous solutions of hydroxide bases, different bases were combined in solution. Up to 5 wt.% of microcrystalline cellulose was dissolved using a combination of NaOH and the organic base tetramethylammonium hydroxide (TMAH) in water at low temperatures. Thermoscans of solutions containing both NaOH(aq) and TMAH(aq) indicated that cellulose interaction with TMAH seems to be favoured over NaOH. Dynamic rheology measurements of the solutions revealed that combining the two bases delayed gelation significantly when compared to cellulose dissolved in NaOH(aq) or TMAH(aq) alone. Intrinsic viscosity of cellulose in the combined NaOH- and TMAH(aq) solutions was slightly higher than that of the single-base solutions, indicating a slight increase in solvent quality. This shows that combining bases may lead to synergies that improve solvent stability without requiring the use of other additives. Graphic abstract

scholarly journals The Solubility of Silver Iodide in Aqueous Solutions of Silver Perchlorate.

1956 ◽  
Vol 10 ◽  
pp. 535-539 ◽  
Author(s):  
Ido Leden ◽  
Curt Parck ◽  
Ulf Ulfvarson ◽  
Einar Stenhagen ◽  
B. Thorell
Keyword(s):  
Aqueous Solutions ◽  
Silver Iodide ◽  
Silver Perchlorate

Thermal expansion of silver iodide-silver molybdate glasses at low temperatures

2009 ◽  
Vol 130 (20) ◽  
pp. 204508 ◽  
Author(s):  
A. Mandanici ◽  
A. Raimondo ◽  
M. Cutroni ◽  
M. A. Ramos ◽  
J. G. Rodrigo ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Low Temperatures ◽  
Silver Iodide ◽  
Silver Molybdate
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