Synthesis of a flower-like MoS2/carbon nanocomposite with enhanced adsorption performance toward Eu(iii): the cooperative effects between S atoms and carboxyl groups. Issue 5 (5th April 2020)

• Record Type: Journal Article
• Authors: Zhao, Chaofeng; Gu, Pengcheng; Liu, Xuewei; Wen, Tao; Ai, Yuejie
• Is Part Of: Environmental science. Volume 6:Issue 5(2020)
• Page Start: 1482
• Page End: 1494
• Publication Date: 2020-04-05
• Subjects: Water-supply -- Periodicals; Water security -- Periodicals; Water resources development -- Periodicals; Water chemistry -- Periodicals; 553.705
• DOI: 10.1039/d0ew00155d
• Languages: English
• ISSNs: 2053-1400

Abstract

Abstract : Combining experimental studies and theoretical calculations to investigate the performance and mechanism of a MoS2 /carbon composite for the effective elimination of Eu(iii ) from wastewater. Abstract : The hazardous consequences that the radionuclide europium (Eu(iii )) has on humanity and the ecological environment motivate the development of advanced sorbent materials for its efficient removal from wastewater. Herein, a flower-like molybdenum disulfide material fabricated using a carbon composite (MoS2 /C) was successfully prepared via an in situ hydrothermal method and confirmed using various experimental characterization methods (scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectroscopy). It was found that the MoS2 /C composite exhibits a 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) due to the cooperative effects between the S atoms of MoS2 and carboxyl groups of the carbon material, which were confirmed from X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations. Besides this, the MoS2 /C exhibited a high adsorption rate with a short equilibrium time (120 min) and a wide pH operating range (4.0–9.0). This study reveals that the MoS2 /C composite can be employed as an auspicious candidate for Eu(iii ) removal and expands the realm of possibilities of using MoS2 -based materials in the field of eliminating radionuclides from wastewater.