Rapid direct conversion of Cu2−xSe to CuAgSe nanoplatelets via ion exchange reactions at room temperature

Nanoscale ◽  
2015 ◽  
Vol 7 (21) ◽  
pp. 9452-9456 ◽  
Author(s):  
N. A. Moroz ◽  
A. Olvera ◽  
G. M. Willis ◽  
P. F. P. Poudeu
Keyword(s):  
Ion Exchange ◽  
Room Temperature ◽  
Direct Conversion ◽  
Exchange Reactions ◽  
The Creation

High Cu+ mobility in cubic Cu2−xSe facilitates Cu+ and Ag+ ion exchange leading to the creation of cubic CuAgSe at 300 K.

Ion Exchange Behavior of the Febex Bentonite. 1. Na/K, Na/Mg and Na/Ca Experimental Exchange Isotherms

2000 ◽  
Vol 663 ◽  
Author(s):  
F.J. Huertas ◽  
P. Carretero ◽  
J. Delgado ◽  
J. Linares ◽  
J. Samper
Keyword(s):  
Ion Exchange ◽  
Divalent Cation ◽  
Room Temperature ◽  
Selectivity Coefficient ◽  
Exchange Constant ◽  
Exchange Reactions ◽  
Selectivity Coefficients ◽  
Equivalent Fractions ◽  
A Value ◽  
Wyoming Bentonite

ABSTRACTNa/K, Na/Mg, and Na/Ca exchange isotherms have been experimentally determined for the FEBEX bentonite. Na-homoionized FEBEXbentonite was reacted at room temperature with mixedsalt dissolution of NaCl/KCl, NaCl/MgCl2, or NaCl/CaCl2, while keeping a total cation normality of 0.5 eq L-1. Isotherm exchange experiments were performed using ten (duplicated)experimental points, which cover the complete range of the corresponding binary equivalent fractions. Results indicate that for the Na/K exchange reaction, Vanselow coefficients are larger than one, what is in agreement with the tendency of the smectite of having greater affinity for K than for Na. The exchange constant decreases as K progressively replaces Na in the smectite. This tendency ends when the equivalent fraction of potassium, EK, reaches a value of around 0.250.3. From this point to higher K contents, it remains nearly constant irrespective of EK but slightly decreasing again at values near one. The Vanselow selectivity coefficient for the Na/Mg isotherm indicates a preference for the divalent cation. It is nearly constant (Kv ≍ 5.6) for EMg < 0.6, but increases up to 10.2 for a nearly Mg-saturated smectite.The Na/Ca exchange resembles that of Na/Mg, although the selectivity coefficients are larger (Kv ≍ 7.0 for ECa < 0.6). The comparison of the selectivity coefficients for the Na/Mg and Na/Ca exchange reactions indicates that the smectite has a slightly higher affinity for Ca than for Mg. This result is consistent with those observed for the Wyoming bentonite.

Growth of nanocrystalline CuIn3Se5 (OVC) thin films by ion exchange reactions at room temperature and their characterization as photo-absorbing layers

2009 ◽  
Vol 255 (18) ◽  
pp. 8158-8163 ◽  
Author(s):  
Ramphal Sharma ◽  
Anil Ghule ◽  
Vidya Taur ◽  
R. Joshi ◽  
Rajaram Mane ◽  
...  
Keyword(s):  
Thin Films ◽  
Ion Exchange ◽  
Room Temperature ◽  
Exchange Reactions

scholarly journals Ion-exchange properties of Zn4(OH)6(SO4) 2.5H2O

2020 ◽  
Vol 81 (3) ◽  
pp. 28-30
Author(s):  
Zlatka Delcheva ◽  
Tsveta Stanimirova ◽  
Nadia Petrova
Keyword(s):  
Ion Exchange ◽  
Room Temperature ◽  
Water Solution ◽  
Exchange Reactions ◽  
Hydrate Phase ◽  
Sulfate Hydrate ◽  
Kinetics Of ◽  
New Phase ◽  
Exchange Properties ◽  
Kinetics Of Ion Exchange

The aim of the present study is to check the possibilities for ion exchange of a new zinc-hydroxy-sulfate-hydrate phase, Zn4(OH)6SO4·2–2.25H2O. The new zinc hydroxy sulfate hydrate phase was obtained by mixing of 0.5 g of Zn5(OH)8(NO3)2.2H2O and 50 ml of 1M Na2SO4 for 48h at room temperature and pH of the solution between 5–7. Ion-exchange properties were investigated by mixing of 0.2 g Zn4(OH)6(SO4) 2.5H2O with 20 ml water solution of NaCl, CaCl2 or SrCl2 with different concentrations (0.5М, 1М, or 2M) for different time (24h, 48h and 72h) at room temperature. The pH of the solutions varied in the range 6–8. The new phase has exchange properties potentials, like other zinc hydroxy sulfate hydrates composed of octahedral-tetrahedral layers. The results obtained for the kinetics of ion-exchange reactions are additional useful data for the solving of the structure of the new zinc-hydroxy-sulfate-hydrate phase in the future.

scholarly journals Ion Exchange Lithography: Localized Ion Exchange Reactions for Spatial Patterning of Perovskite Semiconductors and Insulators

2021 ◽  
pp. 2005291
Author(s):  
Lukas Helmbrecht ◽  
Moritz H. Futscher ◽  
Loreta A. Muscarella ◽  
Bruno Ehrler ◽  
Willem L. Noorduin
Keyword(s):  
Ion Exchange ◽  
Spatial Patterning ◽  
Exchange Reactions

A facile room temperature chemical transformation approach for binder-free thin film formation of Ag2Te and lithiation/delithiation chemistry of the film

2016 ◽  
Vol 45 (43) ◽  
pp. 17312-17318 ◽  
Author(s):  
Eun-Kyung Kim ◽  
Dasom Park ◽  
Nabeen K. Shrestha ◽  
Jinho Chang ◽  
Cheol-Woo Yi ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Aqueous Solution ◽  
Ion Exchange ◽  
Chemical Transformation ◽  
Room Temperature ◽  
Film Formation ◽  
Synthetic Method ◽  
Binder Free ◽  
Thin Film Formation

An aqueous solution based synthetic method for binder-free Ag2Te thin films using ion exchange induced chemical transformation of Ag/AgxO thin films.

Orthogonal Investigation of Influencing Factors on the Modification of Montmorillonite by THPC in Acid Conditions

2014 ◽  
Vol 936 ◽  
pp. 1017-1021
Author(s):  
Pan Chen ◽  
Jin Cheng Wang
Keyword(s):  
Reaction Time ◽  
Ion Exchange ◽  
Influencing Factors ◽  
Reaction Temperature ◽  
Orthogonal Test ◽  
Test Results ◽  
Phosphonium Salts ◽  
Exchange Reactions ◽  
Quaternary Phosphonium Salts

Na-MMT was modified with quaternary phosphonium salts, tetramethylolphosphonium chloride (THPC), via ion-exchange reactions, in acid conditions. Different factors such as reaction time , reaction temperature, the types of solvent, and CEC ratios, were investigated using orthogonal test. Results showed that the best combination of these four factors were A1B3C1D1, that is, the type of the solvent was acetone and water (1:1), reaction time was 3h, CEC ratio was 1:1, and the reaction temperature was 80°C.

Kinetics of Ion-Exchange Reactions in Hybrid Organic–Inorganic Perovskite Thin Films Studied by In Situ Real-Time X-ray Scattering

2018 ◽  
Vol 9 (23) ◽  
pp. 6750-6754 ◽  
Author(s):  
Alessandro Greco ◽  
Alexander Hinderhofer ◽  
M. Ibrahim Dar ◽  
Neha Arora ◽  
Jan Hagenlocher ◽  
...  
Keyword(s):  
Thin Films ◽  
Ion Exchange ◽  
Real Time ◽  
Exchange Reactions ◽  
Inorganic Perovskite ◽  
X Ray ◽  
X Ray Scattering ◽  
Kinetics Of ◽  
Kinetics Of Ion Exchange

scholarly journals Powder XRD Study of Changes of Cd2+ Modified Clinoptilolite at Different Stages of the Ion Exchange Process

Minerals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1130
Author(s):  
Louiza Dimowa ◽  
Yana Tzvetanova
Keyword(s):  
Ion Exchange ◽  
Room Temperature ◽  
Exchange Process ◽  
Unit Cell ◽  
Powder Xrd ◽  
Structural Refinement ◽  
Ion Exchange Process ◽  
Xrd Study ◽  
Modified Clinoptilolite

Cadmium exchange on clinoptilolite is performed and structurally studied for different durations of the ion exchange process (2 h, 24 h, 72 h, 168 h, 12 days, 22 days) at room temperature and 90 °C. The distribution of Cd2+ ions in all samples is elucidated after exchange on clinoptilolite using powder XRD data processed by Rietveld structural software. Clinoptilolite is not selective for cadmium cations, but at 90 °C the exchange is ~2.5 cations per unit cell. At RT it reaches ~1.25 cations per unit cell being twice as low. The obtained maximum exchanged sample for 22 days 90 °C was structurally refined in order to find the cadmium positions in the clinoptilolite voids. The structural refinements of the occupations of the incoming and outgoing cations give an idea of how the intracrystalline diffusion is processed. A good correlation between results obtained by structural refinement of the Cd-exchanged samples and the data of the EDS measurements was achieved.

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