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Iron-Carbon Hybrid Magnetic Nanosheets for Adsorption-Removal of Organic Dyes and 4-Nitrophenol from Aqueous Solution

Manippady, SR and Singh, A and Basavaraja, BM and Samal, AK and Srivastava, S and Saxena, M (2020) Iron-Carbon Hybrid Magnetic Nanosheets for Adsorption-Removal of Organic Dyes and 4-Nitrophenol from Aqueous Solution. In: ACS Applied Nano Materials, 3 (2). pp. 1571-1582.

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Official URL: https://dx.doi.org/10.1021/acsanm.9b02348


Here, we report a nonprecious mesoporous adsorbent obtained from the carbonization of bagasse. The material shows an impressive pH-dependent adsorbent property for cationic, anionic, and commercially used dyes along with an organic contaminant (4-nitrophenol) in water. The adsorbent shows specific surface area of �462 m2 g-1 and the porous layered structure as confirmed by gas adsorption and microscopic techniques, respectively. Further, pH triggered adsorption of methylene blue (MB, cationic dye), Congo red (CR, anionic dye), and commercial hair dye were studied. The results show >96 adsorption for CR and MB within 24 min at pH 2 and pH 8, respectively. Moreover, fast adsorption response, 92.6 in 20 min, was obtained for a commercially used hair dye and demonstrates the practical applicability of the material for wastewater remediation. Under experimental conditions, adsorbent shows ultrafast adsorption kinetics (4 min to achieve equilibrium state with 99.5 adsorption) for 4-nitrophenol from water. Notably, the adsorbent shows structural stability, easily separable with an external magnetic field, and recyclability with �85 efficiency even after the fifth cycle.

Item Type: Journal Article
Publication: ACS Applied Nano Materials
Publisher: American Chemical Society
Additional Information: Copyright of this article belongs to American Chemical Society
Keywords: Adsorption; Aromatic compounds; Azo dyes; Bagasse; Carbon carbon composites; Carbonization; Chemicals removal (water treatment); Gas adsorption; Iron; Stability; Stripping (dyes), 4-Nitrophenol; Congo red; Experimental conditions; External magnetic field; Iron carbon; Methylene Blue; Structural stabilities; Wastewater remediation, Dyes
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 09 Mar 2020 09:53
Last Modified: 09 Mar 2020 09:53
URI: http://eprints.iisc.ac.in/id/eprint/64653

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