Equilibrium and kinetic studies on MB adsorption by ultrathin 2D MoS2 nanosheets

Xiu-Qing Qiao; Fu-Chao Hu; Feng-Yu Tian; Dong-Fang Hou; Dong-Sheng Li

doi:10.1039/C5RA24328A

Equilibrium and kinetic studies on MB adsorption by ultrathin 2D MoS₂ nanosheets†

Xiu-Qing Qiao,‡^a Fu-Chao Hu,‡^a Feng-Yu Tian,^a Dong-Fang Hou^a and Dong-Sheng Li*^a

* Corresponding authors

^a College of Materials and Chemical Engineering, Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei, P. R. China
E-mail: lidongsheng1@126.com
Fax: +86-717-6397506
Tel: +86-717-6397506

Abstract

MoS₂ sheets, graphene-like two-dimensional materials, show application potential in optoelectronics and biomedicine due to their unique properties. However, the environmental influence of such 2D materials remains to be unveiled. Here we report that MoS₂ ultrathin nanosheets synthesized by a hydrothermal process display remarkable selective removal of Methylene Blue (MB) from aqueous solution, showing the maximum adsorption capacity reached up to 146.43 mg g⁻¹ within only 300 seconds. The kinetics and equilibrium of the adsorption process were found to follow the pseudo-second-order kinetic and Freundlich isotherm models, respectively. More importantly, MoS₂ nanosheets can be readily cleaned for reuse by washing with deionized water. This work demonstrates that the resulting MoS₂ nanosheets may be considered as highly efficient and green adsorbents for eliminating MB from aqueous solution.

This article is part of the themed collection: 2D Materials: Explorations Beyond Graphene

Supplementary files

Article information

DOI: https://doi.org/10.1039/C5RA24328A
Article type: Paper
Submitted: 17 Nov 2015
Accepted: 14 Jan 2016
First published: 18 Jan 2016

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RSC Adv., 2016,6, 11631-11636

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Equilibrium and kinetic studies on MB adsorption by ultrathin 2D MoS₂ nanosheets

X. Qiao, F. Hu, F. Tian, D. Hou and D. Li, RSC Adv., 2016, 6, 11631 DOI: 10.1039/C5RA24328A

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