A luminescent dye@MOF as a dual-emitting platform for sensing explosives

2015 ◽  
Vol 51 (99) ◽  
pp. 17521-17524 ◽  
Author(s):  
Xiao-Li Hu ◽  
Chao Qin ◽  
Xin-Long Wang ◽  
Kui-Zhan Shao ◽  
Zhong-Min Su
Keyword(s):  
Energy Transfer ◽  
Ion Exchange ◽  
Cationic Dyes

A luminescent dye@MOFviaion-exchange of cationic dyes was used as a probe to sense explosives by tuning the energy transfer between two different emissions.

The Use of Multiple Ion Exchange to Produce Energy Transfer in Beta Aluminas

1989 ◽  
Author(s):  
L. A. Momoda ◽  
J. D. Barrie ◽  
Bruce Dunn
Keyword(s):  
Energy Transfer ◽  
Ion Exchange

Removal of Toxic Dyestuffs from Aqueous Solution by Amphoteric Bioadsorbent

2020 ◽  
Vol 16 ◽  
Author(s):  
Reda M. El-Shishtawy ◽  
Abdullah M. Asiri ◽  
Nahed S. E. Ahmed
Keyword(s):  
Aqueous Solution ◽  
Ion Exchange ◽  
Dye Removal ◽  
Exchange Process ◽  
Cationic Dyes ◽  
Carboxyl Groups ◽  
Maximum Adsorption Capacity ◽  
Equilibrium Isotherm ◽  
Ion Exchange Process ◽  
Dyes And Pigments

Background: Color effluents generated from the production industry of dyes and pigments and their use in different applications such as textile, paper, leather tanning, and food industries, are high in color and contaminants that damage the aquatic life. It is estimated that about 105 of various commercial dyes and pigments amounted to 7×105 tons are produced annually worldwide. Ultimately, about 10–15% is wasted into the effluents of the textile industry. Chitin is abundant in nature, and it is a linear biopolymer containing acetamido and hydroxyl groups amenable to render it atmospheric by introducing amino and carboxyl groups, hence able to remove different classes of toxic organic dyes from colored effluents. Methods: Chitin was chemically modified to render it amphoteric via the introduction of carboxyl and amino groups. The amphoteric chitin has been fully characterized by FTIR, TGA-DTG, elemental analysis, SEM, and point of zero charge. Adsorption optimization for both anionic and cationic dyes was made by batch adsorption method, and the conditions obtained were used for studying the kinetics and thermodynamics of adsorption. Results: The results of dye removal proved that the adsorbent was proven effective in removing both anionic and cationic dyes (Acid Red 1 and methylene blue (MB)), at their respective optimum pHs (2 for acid and 8 for cationic dye). The equilibrium isotherm at room temperature fitted the Freundlich model for MB, and the maximum adsorption capacity was 98.2 mg/g using 50 mg/l of MB, whereas the equilibrium isotherm fitted the Freundlich and Langmuir model for AR1 and the maximum adsorption capacity was 128.2 mg/g. Kinetic results indicate that the adsorption is a two-step diffusion process for both dyes as indicated by the values of the initial adsorption factor (Ri) and follows the pseudo-second-order kinetics. Also, thermodynamic calculations suggest that the adsorption of AR1 on the amphoteric chitin is an endothermic process from 294 to 303 K. The result indicated that the mechanism of adsorption is chemisorption via an ion-exchange process. Also, recycling of the adsorbent was easy, and its reuse for dye removal was effective. Conclusion: New amphoteric chitin has been successfully synthesized and characterized. This resin material, which contains amino and carboxyl groups, is novel as such chemical modification of chitin hasn’t been reported. The amphoteric chitin has proven effective in decolorizing aqueous solution from anionic and cationic dyes. The adsorption behavior of amphoteric chitin is believed to follow chemical adsorption with an ion-exchange process. The recycling process for few cycles indicated that the loaded adsorbent could be regenerated by simple treatment and retested for removing anionic and cationic dyes without any loss in the adsorbability. Therefore, the study introduces a new and easy approach for the development of amphoteric adsorbent for application in the removal of different dyes from aqueous solutions.

The effect of the core morphology of Eu(III)-doped nanoparticles on the ion exchange versus energy transfer between Eu(III) in the core and Cu(II) ions at the interface

2012 ◽  
Vol 14 (8) ◽  
Author(s):  
Rustem Zairov ◽  
Asiya Mustafina ◽  
Nataliya Shamsutdinova ◽  
Mark H. Rümmeli ◽  
Rustem Amirov ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Ion Exchange ◽  
The Core

Electron and energy transfer as probes of interparticle ion-exchange reactions in zeolite Y

1993 ◽  
Vol 97 (33) ◽  
pp. 8650-8655 ◽  
Author(s):  
Elaine S. Brigham ◽  
Paul T. Snowden ◽  
Yeong Il Kim ◽  
Thomas E. Mallouk
Keyword(s):  
Energy Transfer ◽  
Ion Exchange ◽  
Zeolite Y ◽  
Exchange Reactions

Novel Highly Charged Silica-Coated Tb(III) Nanoparticles with Fluorescent Properties Sensitive to Ion Exchange and Energy Transfer Processes in Aqueous Dispersions

Langmuir ◽  
2009 ◽  
Vol 25 (5) ◽  
pp. 3146-3151 ◽  
Author(s):  
Asiya R. Mustafina ◽  
Svetlana V. Fedorenko ◽  
Olga D. Konovalova ◽  
Anastasiya Yu. Menshikova ◽  
Nataliya N. Shevchenko ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Ion Exchange ◽  
Fluorescent Properties ◽  
Aqueous Dispersions ◽  
Transfer Processes

Luminescence and energy transfer mechanisms in photo-thermo-refractive glasses co-doped with silver molecular clusters and Eu3+

2020 ◽  
Vol 22 (40) ◽  
pp. 23342-23350
Author(s):  
Dmitriy V. Marasanov ◽  
Leonid Yu. Mironov ◽  
Yevgeniy M. Sgibnev ◽  
Ilya E. Kolesnikov ◽  
Nikolay V. Nikonorov
Keyword(s):  
Heat Treatment ◽  
Energy Transfer ◽  
Ion Exchange ◽  
Molecular Clusters ◽  
Transfer Mechanisms ◽  
Co Doped ◽  
Exchange Technique

Silver molecular clusters were synthesized in photo-thermo-refractive glasses using the Na+–Ag+ ion exchange technique followed by heat treatment.

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