Metallic 1T/1T′ phase TMD nanosheets with enhanced chemisorption sites for ultrahigh-efficiency lead removal
Two-dimensional (2D) materials, as adsorbents, have garnered great attention in removing heavy metal ions (HMIs) from drinking water due to their extensive exposed adsorption sites. Nevertheless, there remains a paucity of experimental research to remarkably unlock their adsorption capabilities and fully elucidate their adsorption mechanisms. In this work, exceptional lead ion (Pb<sup>2+</sup>) (a common HMI) removal capacity (up to 758 mg g<sup>-1</sup>) is achieved using our synthesized metallic 1T/1T' phase 2D transition metal dichalcogenide (TMD, including MoS<sub>2</sub>, WS<sub>2</sub>, TaS<sub>2</sub>, and TiS<sub>2</sub>) nanosheets, which hold tremendous activated S chemisorption sites. The residual Pb<sup>2+</sup> concentration can be reduced from 2 mg L<sup>-1</sup> to 2 μg L<sup>-1</sup> within 0.5 min, meeting the drinking water standards following World Health Organization guideline (Pb<sup>2+</sup> concentrations <10 μg L<sup>-1</sup>). Atomic-scale characterizations and calculations based on density functional theory unveil that Pb<sup>2+</sup> bond to the top positions of transition metal atoms in a single-atom form through the formation of S-Pb bonds. Point-of-use (POU) devices fabricated by our reported metallic phase MoS<sub>2</sub> nanosheets exhibit treatment capacity of 55 L-water g<sup>-1</sup>-adsorbent for feed Pb<sup>2+</sup> concentration of 1 mg L<sup>-1</sup>, which is 1-3 orders of magnitude higher than other 2D materials and commercial activated carbon.
Authors
- Damien Voiry (ORCID: https://orcid.org/0000-0002-1664-2839)
- Zhiyuan Zeng (ORCID: https://orcid.org/0000-0001-7483-1438)
- Long Zheng (ORCID: https://orcid.org/0000-0002-7993-2913)
- Jun Fan (ORCID: https://orcid.org/0000-0001-8227-9671)
- Lin Gu (ORCID: https://orcid.org/0000-0002-7504-031X)
- Ruijie Yang (ORCID: https://orcid.org/0000-0002-9410-8439)
- Xiao Cheng Zeng (ORCID: https://orcid.org/0000-0003-4672-8585)
- Yuefeng Zhang (ORCID: https://orcid.org/0000-0003-2104-9711)
- Bolong Huang (ORCID: https://orcid.org/0000-0002-2526-2002)
- Kmy Leung (ORCID: https://orcid.org/0000-0002-2164-4281)
- Hyeon Suk Shin (ORCID: https://orcid.org/0000-0003-0495-7443)
- Jiang Zhou (ORCID: https://orcid.org/0000-0003-0858-4533)
- Mingzi Sun (ORCID: https://orcid.org/0000-0001-5136-7265)
- Liang Mei (ORCID: https://orcid.org/0000-0003-0963-7158)
- Qinghua Zhang (ORCID: https://orcid.org/0000-0001-9086-7000)
- Ye Chen (ORCID: https://orcid.org/0000-0003-0821-7469)
- Zhen Zhang (ORCID: https://orcid.org/0000-0002-3591-932X)
- Wenjun Zhang (ORCID: https://orcid.org/0000-0002-4497-0688)
- Yaqin Zhang (ORCID: https://orcid.org/0000-0001-5675-8804)
- Ye Zhu (ORCID: https://orcid.org/0000-0002-1845-6925)
- Chuyang Y. Tang (ORCID: https://orcid.org/0000-0002-7932-6462)
Institutions
- Centre National de la Recherche Scientifique (FR)
- Central South University (CN)
- Hong Kong Polytechnic University (HK)
- Hunan University (CN)
- City University of Hong Kong (HK)
- Chinese University of Hong Kong (HK)
- Chinese Academy of Sciences (CN)
- Université de Montpellier (FR)
- City University of Hong Kong, Shenzhen Research Institute (CN)
- Institut Européen des Membranes (FR)
- Institute of Physics (CN)
- Sungkyunkwan University (KR)
- University of Hong Kong (HK)
- Tsinghua University (CN)
Publication Details
- Journal
- Nature Communications
- Published
- 2024-09-05
- DOI
- https://doi.org/10.1038/s41467-024-52078-y
- Citations
- 27
- Primary Topic
- MXene and MAX Phase Materials
- Type
- article
- Field-Weighted Citation Impact
- 3.16