Controllable incorporation of oxygen in MoS2 for efficient adsorption of Hg2+ in aqueous solutions

Weiquan Zhan, Feifei Jia, Yuan Yuan, Chang Liu, Kaige Sun, Bingqiao Yang, Shaoxian Song

Resultado de la investigación: Contribución a una revistaArtículo

Resumen

Molybdenum disulfide (MoS2) was incorporated controllably by oxygen in order to modify the hydrophobic surfaces and thus to improve the adsorption of Hg2+ on MoS2 in aqueous solutions in this work. The experimental results indicated that the incorporation of oxygen could dramatically improve the adsorption of Hg2+ on MoS2. With 11% oxygen atom incorporation, the adsorption rate and capacity increased over 17 times and 21 folds, respectively, compared with that without oxygen incorporation. This vast improvement was found to be contributed to that the incorporation of oxygen would greatly enhance the complexation between S atoms and Hg2+ on MoS2 surfaces, resulting in the great increase of the Hg2+ adsorption. The increase of the adsorption capacity with increasing incorporated oxygen reached a plateau, which might be due to the saturation of covalent bond. In addition, the incorporation of oxygen atom greatly enhanced the hydrophilicity of MoS2 surfaces, facilitating the hydrated Hg2+ ions to approach to MoS2 surfaces. This finding might provide a highly potential adsorbent for efficiently removing Hg2+ from water.

Idioma originalInglés
Número de artículo121382
PublicaciónJournal of Hazardous Materials
Volumen384
DOI
EstadoPublicada - 15 feb 2020

Huella dactilar

Adsorption
aqueous solution
Oxygen
adsorption
oxygen
Atoms
Covalent bonds
Hydrophilicity
incorporation
molybdenum
Complexation
Hydrophobic and Hydrophilic Interactions
complexation
Adsorbents
Molybdenum
plateau
saturation
Ions
fold
ion

Citar esto

Zhan, Weiquan ; Jia, Feifei ; Yuan, Yuan ; Liu, Chang ; Sun, Kaige ; Yang, Bingqiao ; Song, Shaoxian. / Controllable incorporation of oxygen in MoS2 for efficient adsorption of Hg2+ in aqueous solutions. En: Journal of Hazardous Materials. 2020 ; Vol. 384.
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abstract = "Molybdenum disulfide (MoS2) was incorporated controllably by oxygen in order to modify the hydrophobic surfaces and thus to improve the adsorption of Hg2+ on MoS2 in aqueous solutions in this work. The experimental results indicated that the incorporation of oxygen could dramatically improve the adsorption of Hg2+ on MoS2. With 11{\%} oxygen atom incorporation, the adsorption rate and capacity increased over 17 times and 21 folds, respectively, compared with that without oxygen incorporation. This vast improvement was found to be contributed to that the incorporation of oxygen would greatly enhance the complexation between S atoms and Hg2+ on MoS2 surfaces, resulting in the great increase of the Hg2+ adsorption. The increase of the adsorption capacity with increasing incorporated oxygen reached a plateau, which might be due to the saturation of covalent bond. In addition, the incorporation of oxygen atom greatly enhanced the hydrophilicity of MoS2 surfaces, facilitating the hydrated Hg2+ ions to approach to MoS2 surfaces. This finding might provide a highly potential adsorbent for efficiently removing Hg2+ from water.",
keywords = "DFT calculations, Hg adsorption, MoS, Oxygen incorporation",
author = "Weiquan Zhan and Feifei Jia and Yuan Yuan and Chang Liu and Kaige Sun and Bingqiao Yang and Shaoxian Song",
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Controllable incorporation of oxygen in MoS2 for efficient adsorption of Hg2+ in aqueous solutions. / Zhan, Weiquan; Jia, Feifei; Yuan, Yuan; Liu, Chang; Sun, Kaige; Yang, Bingqiao; Song, Shaoxian.

En: Journal of Hazardous Materials, Vol. 384, 121382, 15.02.2020.

Resultado de la investigación: Contribución a una revistaArtículo

TY - JOUR

T1 - Controllable incorporation of oxygen in MoS2 for efficient adsorption of Hg2+ in aqueous solutions

AU - Zhan, Weiquan

AU - Jia, Feifei

AU - Yuan, Yuan

AU - Liu, Chang

AU - Sun, Kaige

AU - Yang, Bingqiao

AU - Song, Shaoxian

PY - 2020/2/15

Y1 - 2020/2/15

N2 - Molybdenum disulfide (MoS2) was incorporated controllably by oxygen in order to modify the hydrophobic surfaces and thus to improve the adsorption of Hg2+ on MoS2 in aqueous solutions in this work. The experimental results indicated that the incorporation of oxygen could dramatically improve the adsorption of Hg2+ on MoS2. With 11% oxygen atom incorporation, the adsorption rate and capacity increased over 17 times and 21 folds, respectively, compared with that without oxygen incorporation. This vast improvement was found to be contributed to that the incorporation of oxygen would greatly enhance the complexation between S atoms and Hg2+ on MoS2 surfaces, resulting in the great increase of the Hg2+ adsorption. The increase of the adsorption capacity with increasing incorporated oxygen reached a plateau, which might be due to the saturation of covalent bond. In addition, the incorporation of oxygen atom greatly enhanced the hydrophilicity of MoS2 surfaces, facilitating the hydrated Hg2+ ions to approach to MoS2 surfaces. This finding might provide a highly potential adsorbent for efficiently removing Hg2+ from water.

AB - Molybdenum disulfide (MoS2) was incorporated controllably by oxygen in order to modify the hydrophobic surfaces and thus to improve the adsorption of Hg2+ on MoS2 in aqueous solutions in this work. The experimental results indicated that the incorporation of oxygen could dramatically improve the adsorption of Hg2+ on MoS2. With 11% oxygen atom incorporation, the adsorption rate and capacity increased over 17 times and 21 folds, respectively, compared with that without oxygen incorporation. This vast improvement was found to be contributed to that the incorporation of oxygen would greatly enhance the complexation between S atoms and Hg2+ on MoS2 surfaces, resulting in the great increase of the Hg2+ adsorption. The increase of the adsorption capacity with increasing incorporated oxygen reached a plateau, which might be due to the saturation of covalent bond. In addition, the incorporation of oxygen atom greatly enhanced the hydrophilicity of MoS2 surfaces, facilitating the hydrated Hg2+ ions to approach to MoS2 surfaces. This finding might provide a highly potential adsorbent for efficiently removing Hg2+ from water.

KW - DFT calculations

KW - Hg adsorption

KW - MoS

KW - Oxygen incorporation

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JO - Journal of Hazardous Materials

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