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Carboxymethyl β-Cyclodextrin Assistance for the 4-Nitrophenol Reduction Using Cobalt-Based Layered Double Hydroxides
Alexia Demeester1, Fatima Douma1, Renaud Cousin2
1Unité de Catalyse et Chimie du Solide (UCCS), UMR 8181, Université de Lille, CNRS, Centrale Lille, Université d'Artois, rue Jean Souvraz, SP 18, 62300 Lens, France.
International Journal of Molecular Sciences
|June 27, 2024
Summary
New cobalt-aluminum layered double hydroxides incorporating carboxymethyl β-cyclodextrin (CMβCD) enhance 4-nitrophenol reduction. These hybrid materials show improved catalytic activity and reusability, demonstrating the synergistic effect of the layered structure and CMβCD.
Area of Science:
- Materials Science
- Catalysis
- Nanotechnology
Background:
- Layered double hydroxides (LDHs) are versatile materials with applications in catalysis.
- Cobalt-based materials are effective catalysts for various chemical transformations.
- Cyclodextrins can modify material properties and enhance catalytic performance.
Purpose of the Study:
- To synthesize and characterize cobalt-aluminum layered double hydroxides intercalated with carboxymethyl β-cyclodextrin (CMβCD).
- To evaluate the catalytic activity of these hybrid materials for the reduction of 4-nitrophenol.
- To investigate the role of the layered structure and CMβCD in the catalytic process.
Main Methods:
- Coprecipitation synthesis of cobalt-aluminum-layered double hydroxides.
- Physicochemical characterization using XRD, FTIR, and TGA.
- Catalytic evaluation of 4-nitrophenol reduction in an aqueous medium.
Main Results:
- Successful intercalation of CMβCD into the layered double hydroxide structure without structural damage.
- CoAl_CMβCD hybrid materials exhibited higher catalytic activity for 4-nitrophenol reduction compared to CMβCD-free materials.
- Experimental controls confirmed the beneficial effects of both the layered double hydroxide structure and the CMβCD component.
- CMβCD also demonstrated a positive effect as an additive, and the CoAl_CO3 material showed reusability over five cycles.
Conclusions:
- Cobalt-aluminum layered double hydroxides intercalated with CMβCD are effective catalysts for 4-nitrophenol reduction.
- The hybrid structure enhances catalytic performance, likely due to synergistic effects between the LDH and CMβCD.
- These materials offer a promising platform for developing efficient and reusable catalysts.
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