Reusable, few-layered-MoS2 nanosheets/graphene hybrid on cellulose paper for superior adsorption of methylene blue dye

Gopalakrishnan, A. and Badhulika, Sushmee and et al, . (2020) Reusable, few-layered-MoS2 nanosheets/graphene hybrid on cellulose paper for superior adsorption of methylene blue dye. New Journal of Chemistry, 44 (14). pp. 5489-5500. ISSN 1144-0546

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In this study, we report for the first time few-layered MoS2 nanosheets grown onto graphene dipped cellulose filter paper (M-G-CFP) using a simple hydrothermal method towards efficient adsorption of cationic methylene blue (MB) dye. Detailed morphological and chemical characterization studies of M-G-CFP are performed using FESEM, TEM, XRD and Raman spectroscopy that reveal micro flower-like MoS2 grown onto graphene modified paper with few layers of MoS2 nanosheets and its high purity nature. Due to electrostatic interactions between cationic dye and the anionic adsorbent surface, the hybrid M-G-CFP exhibits ultrafast removal of MB within 2 min with a maximum adsorption capacity of 485.4 mg g-1 which is superior in comparison to other reported MoS2 based adsorbents. This high adsorption capacity is attributed to large accessible active sites on the surface of the hybrid M-G-CFP structure. The adsorption mechanism of MB dye on the MoS2 nanosheets are well described using kinetic and isotherm models with the effects of parameters like pH, contact time and temperature. The kinetic and isotherm study reveals that the adsorption of MB dye follows a pseudo-second order model, indicating the chemisorption and Langmuir model of monolayer adsorption, respectively. Furthermore, this hybrid structure can be efficiently reused for subsequent dye adsorption without compromising on its dye removal efficiency suggesting it is a feasible and promising material towards wastewater treatment applications.

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IITH Creators:
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Item Type: Article
Additional Information: The authors acknowledge financial assistance from the Department of Science and Technology (DST), Government of India, Grant # DST/INSPIRE/04/2014/015132.
Uncontrolled Keywords: adsorption; Article; comparative study; contact time; controlled study; decolorization; field emission scanning electron microscopy; green chemistry; pH; priority journal; Raman spectrometry; recycling; static electricity; surface property; temperature; transmission electron microscopy; waste water management; X ray diffraction
Subjects: Electrical Engineering
Divisions: Department of Electrical Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 06 Aug 2021 04:50
Last Modified: 18 Nov 2022 06:05
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