Ti3C2Tx MXene core-shell spheres for ultrahigh removal of mercuric ions

Asif Shahzad; Mohsin Nawaz; Mokrema Moztahida; Jiseon Jang; Khurram Tahir; Jiho Kim; Youngsu Lim; Vassilios S. Vassiliadis; Seung Han Woo; Dae Sung Lee

doi:10.1016/j.cej.2019.02.160

Ti₃C₂T_x MXene core-shell spheres for ultrahigh removal of mercuric ions

Asif Shahzad, Mohsin Nawaz, Mokrema Moztahida, Jiseon Jang, Khurram Tahir, Jiho Kim, Youngsu Lim, Vassilios S. Vassiliadis, Seung Han Woo, Dae Sung Lee

Department of Environmental Engineering

Research output: Contribution to journal › Article › peer-review

189 Scopus citations

Abstract

Two-dimensional (2-D) titanium carbide MXene core (Ti₃C₂T_x) shell aerogel spheres (MX-SA) for mercuric ion removal were designed and fabricated with varying concentrations of Ti₃C₂T_x MXene and sodium alginate (SA) using a facile method. Owing to their unique inside structures, high porosities, large specific surface areas, oxygenated functional groups of MXene nanosheets, and available active binding sites, the synthesized microspheres constitute a unique adsorbent for heavy metals removal in water. The MX-SA_4:20 spheres exhibit an exceptional adsorption capacity of 932.84 mg/g for Hg²⁺, which is among the highest value reported for adsorbents. The adsorbent exhibits high single- and multi-component removal efficiencies, with 100% efficiency for Hg²⁺ and >90% efficiency for five heavy metal ions. The synthesized materials are highly efficient for Hg²⁺ removal under extreme pH conditions (0.5–1.0 M HNO₃) and have additional excellent reproducible properties. The micro-size and spherical shape of MX-SA_4:20 also allow it to be used in column-packed devices.

Original language	English
Pages (from-to)	400-408
Number of pages	9
Journal	Chemical Engineering Journal
Volume	368
DOIs	https://doi.org/10.1016/j.cej.2019.02.160
State	Published - 15 Jul 2019

Keywords

Adsorption
Heavy metal
Microspheres
Titanium carbide

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10.1016/j.cej.2019.02.160

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title = "Ti3C2Tx MXene core-shell spheres for ultrahigh removal of mercuric ions",

abstract = "Two-dimensional (2-D) titanium carbide MXene core (Ti3C2Tx) shell aerogel spheres (MX-SA) for mercuric ion removal were designed and fabricated with varying concentrations of Ti3C2Tx MXene and sodium alginate (SA) using a facile method. Owing to their unique inside structures, high porosities, large specific surface areas, oxygenated functional groups of MXene nanosheets, and available active binding sites, the synthesized microspheres constitute a unique adsorbent for heavy metals removal in water. The MX-SA4:20 spheres exhibit an exceptional adsorption capacity of 932.84 mg/g for Hg2+, which is among the highest value reported for adsorbents. The adsorbent exhibits high single- and multi-component removal efficiencies, with 100% efficiency for Hg2+ and >90% efficiency for five heavy metal ions. The synthesized materials are highly efficient for Hg2+ removal under extreme pH conditions (0.5–1.0 M HNO3) and have additional excellent reproducible properties. The micro-size and spherical shape of MX-SA4:20 also allow it to be used in column-packed devices.",

keywords = "Adsorption, Heavy metal, Microspheres, Titanium carbide",

author = "Asif Shahzad and Mohsin Nawaz and Mokrema Moztahida and Jiseon Jang and Khurram Tahir and Jiho Kim and Youngsu Lim and Vassiliadis, {Vassilios S.} and Woo, {Seung Han} and Lee, {Dae Sung}",

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year = "2019",

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day = "15",

doi = "10.1016/j.cej.2019.02.160",

language = "English",

volume = "368",

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T1 - Ti3C2Tx MXene core-shell spheres for ultrahigh removal of mercuric ions

AU - Shahzad, Asif

AU - Nawaz, Mohsin

AU - Moztahida, Mokrema

AU - Jang, Jiseon

AU - Tahir, Khurram

AU - Kim, Jiho

AU - Lim, Youngsu

AU - Vassiliadis, Vassilios S.

AU - Woo, Seung Han

AU - Lee, Dae Sung

PY - 2019/7/15

Y1 - 2019/7/15

N2 - Two-dimensional (2-D) titanium carbide MXene core (Ti3C2Tx) shell aerogel spheres (MX-SA) for mercuric ion removal were designed and fabricated with varying concentrations of Ti3C2Tx MXene and sodium alginate (SA) using a facile method. Owing to their unique inside structures, high porosities, large specific surface areas, oxygenated functional groups of MXene nanosheets, and available active binding sites, the synthesized microspheres constitute a unique adsorbent for heavy metals removal in water. The MX-SA4:20 spheres exhibit an exceptional adsorption capacity of 932.84 mg/g for Hg2+, which is among the highest value reported for adsorbents. The adsorbent exhibits high single- and multi-component removal efficiencies, with 100% efficiency for Hg2+ and >90% efficiency for five heavy metal ions. The synthesized materials are highly efficient for Hg2+ removal under extreme pH conditions (0.5–1.0 M HNO3) and have additional excellent reproducible properties. The micro-size and spherical shape of MX-SA4:20 also allow it to be used in column-packed devices.

AB - Two-dimensional (2-D) titanium carbide MXene core (Ti3C2Tx) shell aerogel spheres (MX-SA) for mercuric ion removal were designed and fabricated with varying concentrations of Ti3C2Tx MXene and sodium alginate (SA) using a facile method. Owing to their unique inside structures, high porosities, large specific surface areas, oxygenated functional groups of MXene nanosheets, and available active binding sites, the synthesized microspheres constitute a unique adsorbent for heavy metals removal in water. The MX-SA4:20 spheres exhibit an exceptional adsorption capacity of 932.84 mg/g for Hg2+, which is among the highest value reported for adsorbents. The adsorbent exhibits high single- and multi-component removal efficiencies, with 100% efficiency for Hg2+ and >90% efficiency for five heavy metal ions. The synthesized materials are highly efficient for Hg2+ removal under extreme pH conditions (0.5–1.0 M HNO3) and have additional excellent reproducible properties. The micro-size and spherical shape of MX-SA4:20 also allow it to be used in column-packed devices.

KW - Adsorption

KW - Heavy metal

KW - Microspheres

KW - Titanium carbide

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DO - 10.1016/j.cej.2019.02.160

M3 - Article

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SP - 400

EP - 408

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -

Ti₃C₂T_x MXene core-shell spheres for ultrahigh removal of mercuric ions

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Keywords

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