Dynamics and Mechanism of Intercalation/De-Intercalation of Rhodamine B during the Polymorphic Transformation of the CdAl Layered Double Hydroxide to the Brucite-like Cadmium Hydroxide
| Autor: | Alaa Ezzeddine, Mazen Al-Ghoul, Niveen M. Khashab, Daniel Saliba, Abdul-Hamid M. Emwas |
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| Rok vydání: | 2016 |
| Předmět: |
Cadmium hydroxide
Thermogravimetric analysis Brucite Kinetics Inorganic chemistry Intercalation (chemistry) 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Differential scanning calorimetry chemistry Rhodamine B engineering Hydroxide General Materials Science 0210 nano-technology Nuclear chemistry |
| Zdroj: | Crystal Growth & Design. 16:4327-4335 |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/acs.cgd.6b00455 |
| Popis: | We studied the kinetics of intercalation of a fluorescent probe (rhodamine B (RhB)) during the formation of hierarchal microspheres of cadmium–aluminum layered double hydroxide (CdAlA LDH) and its de-intercalation upon transformation from the LDH phase into the cadmium hydroxide β phase (Cd(OH)2) using a reaction-diffusion framework (RDF) where the hydroxide anions diffuse into an agar gel matrix containing the proper salts–fluorescent probe mixture. In this framework, we achieved the stabilization of the CdAlA LDH, which is known to be thermodynamically unstable and transforms into Cd(OH)2 and Al(OH)3 in a short period. RDF is advantageous as it allows with ease the extraction of the cosynthesized polymorphs and their characterization using X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), solid-state nuclear magnetic resonance (SSNMR), Fourier transform infrared (FT-IR), and energy dispersive X-ray (EDX). The kinetics of inter/de-intercalation is studi... |
| Databáze: | OpenAIRE |
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