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Updated: Feb 22, 2026
Synthesis and Characterization of Fe-doped Aluminosilicate Nanotubes with Enhanced Electron Conductive Properties
Published on: November 15, 2016
Aerogeles de alginato de sodio-bentonita-Fe-ATA autoensamblados con reticulación sintonizable para la adsorción de
Pingfei Liang1, Qurat Ul Ain2, Lijun Dai1
1Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, China; University Engineering Research Center of Green Chemical New Materials, Guangxi, 530004, China.
Abstract:
Sodium alginate (SA)-based aerogels and MOF materials have been well documented for dye removal, yet both materials face fundamental limitations that hinder their use in real waters. SA exhibits a single type of adsorption site in its unmodified form, whereas MOFs suffer structural damage upon long-term exposure to aqueous environments. To address these issues, this study achieved the in-situ growth of a metal (Fe3+)-ligand (2-aminoterephthalic acid (ATA)) coordination network within the sodium alginate gel scaffold, thereby maximizing the synergistic adsorption advantages of SA aerogels and Fe-MOF. The material was further reinforced with bentonite (BNT) to enhance mechanical rigidity and diversified functionality for improved dye capture. Sequential crosslinking of the SA-BNT mixture with Fe3+ and ATA, respectively, yielded a doubly crosslinked aerogel (DCL-aerogel) containing in situ-formed metal-ligand coordination bonds. DCL-aerogel exhibits superior dye adsorption performance, with maximum adsorption capacities for methylene blue (MB) and crystal violet (CV) reaching 1317 and 1334 mg/g, respectively. The adsorption behavior followed the Langmuir isotherm and the pseudo-second-order kinetic model, achieving equilibrium within 120 min and maintaining strong stability over a wide pH range (2-12). The DCL-aerogel exhibited excellent dye removal efficiency, structural stability, and chemical adaptability, demonstrating its great potential as a sustainable bio-MOF hybrid adsorbent for wastewater purification.
