Remarkable Acid Stability of Polypyrrole-MoS4

A Highly Selective and Efficient Scavenger of Heavy Metals Over a Wide pH Range

Linxia Xie, Zihuan Yu, Saiful M. Islam, Keren Shi, Yahan Cheng, Mengwei Yuan, Jing Zhao, Genban Sun, Huifeng Li, Shulan Ma, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The new material polypyrrole/MoS4 2−(MoS4-Ppy), prepared by ion-exchange of NO3- of NO3-Ppy with MoS4 2−, displays high acid stability and excellent uptake for heavy metal ions such as Hg2+, Ag+, Cu2+, and Pb2+. The different maximum adsorption capacities (qm) for Cu2+, Pb2+, Hg2+, and Ag+ depend on the various binding modes arising from the different thiophilicity of these metal ions. The removals of Ag+ and Pb2+ reach >99.6% within 5 min, and for highly toxic Hg2+, >98% removal achieves at 1 min. At strong acid limit, the exceptional qm(Ag+) of 725 mg g−1 places the MoS4-Ppy at the top of materials for such removal. Uptake kinetics of Ag+, Hg2+, and Pb2+ is extremely fast: >99.9% removal rates at wide pH range (0.5–6) within 1–5 min. Also, at strongly acidic conditions (pH ≈ 1), for highly toxic Hg2+, <2 ppb concentration can be achieved, accepted as safe limit. The MoS4-Ppy demonstrates an outstanding ability to separate low-concentrated Ag+ from high concentrated Cu2+ especially under strong acidic conditions (pH ≈ 1), showing a large separation factor SFAg/Cu (Kd Ag/Kd Cu) of 105 (>100). MoS4-Ppy is a superior and novel sorbent material for water remediation applications as well as precious metals recovery.

Original languageEnglish
Article number1800502
JournalAdvanced Functional Materials
Volume28
Issue number20
DOIs
Publication statusPublished - May 16 2018

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polypyrroles
Polypyrroles
heavy metals
Heavy Metals
Heavy metals
acids
Acids
Poisons
Metal ions
metal ions
Metal recovery
sorbents
Precious metals
Sorbents
noble metals
Remediation
Heavy ions
Ion exchange
heavy ions
recovery

Keywords

  • acid stability
  • heavy metal removal
  • polypyrrole-MoS materials
  • scavengers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Condensed Matter Physics
  • Electrochemistry

Cite this

Remarkable Acid Stability of Polypyrrole-MoS4 : A Highly Selective and Efficient Scavenger of Heavy Metals Over a Wide pH Range. / Xie, Linxia; Yu, Zihuan; Islam, Saiful M.; Shi, Keren; Cheng, Yahan; Yuan, Mengwei; Zhao, Jing; Sun, Genban; Li, Huifeng; Ma, Shulan; Kanatzidis, Mercouri G.

In: Advanced Functional Materials, Vol. 28, No. 20, 1800502, 16.05.2018.

Research output: Contribution to journalArticle

Xie, Linxia ; Yu, Zihuan ; Islam, Saiful M. ; Shi, Keren ; Cheng, Yahan ; Yuan, Mengwei ; Zhao, Jing ; Sun, Genban ; Li, Huifeng ; Ma, Shulan ; Kanatzidis, Mercouri G. / Remarkable Acid Stability of Polypyrrole-MoS4 : A Highly Selective and Efficient Scavenger of Heavy Metals Over a Wide pH Range. In: Advanced Functional Materials. 2018 ; Vol. 28, No. 20.
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abstract = "The new material polypyrrole/MoS4 2−(MoS4-Ppy), prepared by ion-exchange of NO3- of NO3-Ppy with MoS4 2−, displays high acid stability and excellent uptake for heavy metal ions such as Hg2+, Ag+, Cu2+, and Pb2+. The different maximum adsorption capacities (qm) for Cu2+, Pb2+, Hg2+, and Ag+ depend on the various binding modes arising from the different thiophilicity of these metal ions. The removals of Ag+ and Pb2+ reach >99.6{\%} within 5 min, and for highly toxic Hg2+, >98{\%} removal achieves at 1 min. At strong acid limit, the exceptional qm(Ag+) of 725 mg g−1 places the MoS4-Ppy at the top of materials for such removal. Uptake kinetics of Ag+, Hg2+, and Pb2+ is extremely fast: >99.9{\%} removal rates at wide pH range (0.5–6) within 1–5 min. Also, at strongly acidic conditions (pH ≈ 1), for highly toxic Hg2+, <2 ppb concentration can be achieved, accepted as safe limit. The MoS4-Ppy demonstrates an outstanding ability to separate low-concentrated Ag+ from high concentrated Cu2+ especially under strong acidic conditions (pH ≈ 1), showing a large separation factor SFAg/Cu (Kd Ag/Kd Cu) of 105 (>100). MoS4-Ppy is a superior and novel sorbent material for water remediation applications as well as precious metals recovery.",
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T2 - A Highly Selective and Efficient Scavenger of Heavy Metals Over a Wide pH Range

AU - Xie, Linxia

AU - Yu, Zihuan

AU - Islam, Saiful M.

AU - Shi, Keren

AU - Cheng, Yahan

AU - Yuan, Mengwei

AU - Zhao, Jing

AU - Sun, Genban

AU - Li, Huifeng

AU - Ma, Shulan

AU - Kanatzidis, Mercouri G

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N2 - The new material polypyrrole/MoS4 2−(MoS4-Ppy), prepared by ion-exchange of NO3- of NO3-Ppy with MoS4 2−, displays high acid stability and excellent uptake for heavy metal ions such as Hg2+, Ag+, Cu2+, and Pb2+. The different maximum adsorption capacities (qm) for Cu2+, Pb2+, Hg2+, and Ag+ depend on the various binding modes arising from the different thiophilicity of these metal ions. The removals of Ag+ and Pb2+ reach >99.6% within 5 min, and for highly toxic Hg2+, >98% removal achieves at 1 min. At strong acid limit, the exceptional qm(Ag+) of 725 mg g−1 places the MoS4-Ppy at the top of materials for such removal. Uptake kinetics of Ag+, Hg2+, and Pb2+ is extremely fast: >99.9% removal rates at wide pH range (0.5–6) within 1–5 min. Also, at strongly acidic conditions (pH ≈ 1), for highly toxic Hg2+, <2 ppb concentration can be achieved, accepted as safe limit. The MoS4-Ppy demonstrates an outstanding ability to separate low-concentrated Ag+ from high concentrated Cu2+ especially under strong acidic conditions (pH ≈ 1), showing a large separation factor SFAg/Cu (Kd Ag/Kd Cu) of 105 (>100). MoS4-Ppy is a superior and novel sorbent material for water remediation applications as well as precious metals recovery.

AB - The new material polypyrrole/MoS4 2−(MoS4-Ppy), prepared by ion-exchange of NO3- of NO3-Ppy with MoS4 2−, displays high acid stability and excellent uptake for heavy metal ions such as Hg2+, Ag+, Cu2+, and Pb2+. The different maximum adsorption capacities (qm) for Cu2+, Pb2+, Hg2+, and Ag+ depend on the various binding modes arising from the different thiophilicity of these metal ions. The removals of Ag+ and Pb2+ reach >99.6% within 5 min, and for highly toxic Hg2+, >98% removal achieves at 1 min. At strong acid limit, the exceptional qm(Ag+) of 725 mg g−1 places the MoS4-Ppy at the top of materials for such removal. Uptake kinetics of Ag+, Hg2+, and Pb2+ is extremely fast: >99.9% removal rates at wide pH range (0.5–6) within 1–5 min. Also, at strongly acidic conditions (pH ≈ 1), for highly toxic Hg2+, <2 ppb concentration can be achieved, accepted as safe limit. The MoS4-Ppy demonstrates an outstanding ability to separate low-concentrated Ag+ from high concentrated Cu2+ especially under strong acidic conditions (pH ≈ 1), showing a large separation factor SFAg/Cu (Kd Ag/Kd Cu) of 105 (>100). MoS4-Ppy is a superior and novel sorbent material for water remediation applications as well as precious metals recovery.

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