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Synthesis of flower-like MoS2/carbon nanocomposite with enhanced adsorption performances toward Eu(III): the cooperative effects between S atoms and carboxyl groups

Abstract

The hazardous consequences of radionuclide europium (Eu(III)) to humanity and ecological environment motivate the development of advanced sorbent materials for its efficient removal from wastewater. Herein, a flower-like molybdenum disulfide material fabricated with carbon composite (MoS2/C) was successfully prepared by situ hydrothermal method and confirmed by various experimental characterizations (scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR)). It was found the MoS2/C composite behaved much higher sorption capacity (100.57 mg·g-1, pH 5.0, 298 K) towards Eu(III) than that of pristine MoS2 (32.52 mg·g-1 , pH 5.0, 298 K) by reason of the cooperative effects between S atoms of MoS2 and carboxyl groups of carbon material, which have been confirmed by X-ray photoelectron spectroscopy (XPS) and the density functional theory (DFT) calculations. Besides, the MoS2/C exhibited high adsorption rate with short equilibrium (120 min) and a wide pH operating range (4.0-9.0). This study reveals the MoS2/C composite can be employed as an auspicious candidate for Eu(III) removal and expands the realm of possibilities of MoS2 based materials in the field of eliminating radionuclide from wastewater.

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Article information


Submitted
22 Feb 2020
Accepted
19 Mar 2020
First published
20 Mar 2020

Environ. Sci.: Water Res. Technol., 2020, Accepted Manuscript
Article type
Paper

Synthesis of flower-like MoS2/carbon nanocomposite with enhanced adsorption performances toward Eu(III): the cooperative effects between S atoms and carboxyl groups

C. Zhao, P. Gu, X. Liu, T. Wen and Y. Ai, Environ. Sci.: Water Res. Technol., 2020, Accepted Manuscript , DOI: 10.1039/D0EW00155D

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