Highly efficient and selectivity removal of heavy metal ions using single-layer NaxKyMnO2 nanosheet: A combination of experimental and theoretical study

Ruichao Peng, Hao Li, Yongting Chen, Feipeng Ren, Fengyu Tian, Yawei Gu, Honglei Zhang, Xiurong Huang

Research output: Journal PublicationArticlepeer-review

4 Citations (Scopus)

Abstract

Manganese oxides (MnO2) are widely applied in heavy metal ions removal due to their low-cost, environmental-friendly and biocompatibility. However, the adsorption capacity of MnO2 need to be further improved to satisfy the demand of practical application. Herein, a highly dispersed single layer NaxKyMnO2 nanosheet was synthesized by a facile wet-chemical method with sodium dodecyl sulfonate as surfactant. The high surface specific area, excellent dispersibility and abundant oxygen vacancies endowed NaxKyMnO2 nanosheets with potential in heavy metal ions adsorption. The adsorption experiments results showed that NaxKyMnO2 nanosheets possessed high efficiency and selectivity towards lead ion (Pb2+) with a high adsorption capacity of 2091.8 μmol g−1. The NaxKyMnO2 also showed an excellent reusability with the removal rate of 95.4% for Pb2+ even after five cycles. Moreover, both the theoretical calculation and experimental data illustrated that the single layer NaxKyMnO2 nanosheets possess high selectivity to Pb2+ adsorption.

Original languageEnglish
Article number130068
JournalChemosphere
Volume275
DOIs
Publication statusPublished - Jul 2021
Externally publishedYes

Keywords

  • Adsorption
  • Heavy metal ions removal
  • Manganese oxide
  • Two-dimensional

ASJC Scopus subject areas

  • Environmental Engineering
  • Chemistry (all)
  • Environmental Chemistry
  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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