Synthesis and Characterization of Halloysite-Cyclodextrin Nanosponges for Enhanced Dyes Adsorption

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RESEARCH PRODUCT

Synthesis and Characterization of Halloysite-Cyclodextrin Nanosponges for Enhanced Dyes Adsorption

Marina Massaro Serena Riela Renato Noto Carmelo Giuseppe Colletti Giuseppe Lazzara Susanna Guernelli

subject

Nanosponges General Chemical Engineering 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Halloysite Nanosponge Nanomaterials chemistry.chemical_compound Bioremediation; Cyclodextrin; Halloysite; Nanosponges Adsorption Rhodamine B Environmental Chemistry Organic chemistry Cyclodextrin Freundlich equation Settore CHIM/02 - Chimica Fisica chemistry.chemical_classification Cyclodextrin Renewable Energy Sustainability and the Environment Cationic polymerization Halloysite General Chemistry Settore CHIM/06 - Chimica Organica 021001 nanoscience & nanotechnology 0104 chemical sciences Characterization (materials science)Halloysite Nanosponges Cyclodextrin Bioremediation chemistry Chemical engineering engineering 0210 nano-technology Bioremediation

description

Inorganic-organic nanosponge hybrids based on halloysite clay and organic cyclodextrin derivatives (HNT-CDs) were developed by means of microwave irradiations in solvent-free conditions. The HNT-CDs nanomaterials characterized by FT-IR, TGA, BET, TEM, SEM, DLS, and zeta-potential have showed a hyper-reticulated network which possesses both HNT and cyclodextrin peculiarities. The new HNT-CDs nanosponge hybrids were employed as nanoadsorbents, first choosing Rhodamine B as the dye model, and furthermore for the removal of some cationic and anionic dyes, under different pH values (1.0, 4.54, and 7.4). The collected results showed that the pH solution as well as the electrostatic interactions affect the adsorption process. Factors controlling the adsorption process were discussed. The experimental adsorption equilibrium and kinetic data were best described by the Freundlich isotherm model. Excellent adsorption efficiency for cationic dyes were observed with respect to anionic ones. The results suggest that HNT-CDs nanosponge hybrids are a good nanoadsorbent for selective adsorption of cationic dyes with respect to the anionic ones from aqueous solutions.

year	journal	country	edition	language
2017-01-01

10.1021/acssuschemeng.6b03191 http://hdl.handle.net/10447/225510