One-pot synthesis of layered double hydroxide hollow nanospheres with ultrafast removal efficiency for heavy metal ions and organic contaminants
Abstract
Herein, Mg/Fe layered double hydroxide (MF-LDH) hollow nanospheres were successfully prepared by a one-step thermal method. After the thermal treatment of MF-LDH nanospheres at 400 °C, the MF-LDH was converted into the corresponding oxide, Mg/Fe layered double oxide (MF-LDO), which maintained the hollow nanosphere structure. The MF-LDO hollow nanospheres exhibited excellent adsorption efficiency for both As(V) and Cr(VI), showing 99% removal within 5 min and providing maximum removal capacities of 178.6 mg g-1 [As(VI)] and 148.7 mg g-1 [Cr(VI)]. Moreover, it met the maximum contaminant level requirements recommended by World Health Organization (WHO); 10 ppm for As(V) and 50 ppm for Cr(VI) in 10 and 20 min, respectively. Furthermore, Au nanoparticles were successfully introduced in the MF-LDO hollow nanospheres, and the products showed a conversion rate of 100% for the reduction of 4-nitrophenol into 4-aminophenol within 5 min. It is believed that these excellent and versatile abilities integrated with a facile synthetic strategy will facilitate the practical application of this material in cost-effective wastewater purification.
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LDH-based adsorbents face limitations for practical large-scale applications, including structural instability under extreme pH, loss of crystallinity, aggregation, and decreased performance with competing ions or natural organic matter.
“Despite these advances, LDH-based adsorbents face important limitations when considering practical, large-scale applications. Key challenges include structural instability under extreme pH conditions (strongly acidic or alkaline), loss of crystallinity, aggregation of particles, and decreased performance in the presence of competing ions or natural organic matter.”
From Emerging nanotechnology approaches for sustainable water treatment and heavy metals removal: a comprehensive review (2025) · cites this paper as [233]
Functional ligands or intercalated anions in LDHs can leach out or degrade over repeated cycles, reducing long-term stability.
“Additionally, functional ligands or intercalated anions can leach out or degrade over repeated cycles, reducing long-term stability.”
From Emerging nanotechnology approaches for sustainable water treatment and heavy metals removal: a comprehensive review (2025) · cites this paper as [233]
The trade-off between material performance and synthesis complexity or cost remains a critical issue for LDHs.
“The trade-off between material performance (capacity, rate) and synthesis complexity or cost remains a critical issue.230,233”
From Emerging nanotechnology approaches for sustainable water treatment and heavy metals removal: a comprehensive review (2025) · cites this paper as [233]
Synthesis methods involving surfactants or sacrificial templates may introduce toxicity or require multi-step, energy-intensive processes.
“Synthesis methods involving surfactants or sacrificial templates may introduce toxicity or require multi-step, energy-intensive processes.”
From Emerging nanotechnology approaches for sustainable water treatment and heavy metals removal: a comprehensive review (2025) · cites this paper as [233]
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“230,233 To improve applicability, recent studies suggest multiple strategies: designing defect-rich LDHs with robust metal – cation frameworks, using benign intercalated anions or environmentally safe ligands, hybrid-izing LDHs with stable supports ( e.g. , biochar, polymer matrices) to prevent…”
- Authors
- Mubarak, M., Jeon, H., Islam, M. S., Yoon, C., Bae, J.-S., Hwang, S.-J., Choi, W. S., & Lee, H.-J.
- Affiliations
- Ewha Womans University (KR)
- Korea Basic Science Institute (KR)
- Hanbat National University (KR)
- Corresponding author
- Lee, Ha-Jin
- Venue
- Chemosphere
- Publisher
- Elsevier BV
- Published
- 2018-06
- Volume
- 201
- Pages
- 676-686
- ISSN
- 0045-6535 (ISSN-L)
- OpenAlex
- W2789779391
- Cited by
- 59
- References
- 55
- Citations by year
- 2026: 2 · 2025: 6 · 2024: 11 · 2023: 4 · 2022: 15 · 2021: 7 · 2020: 9 · 2019: 3 · 2018: 2
- FWCI
- 1.96
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Chemosphere (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Research Council of Science and Technology (DRC-14-1-KBSI)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Layered Double Hydroxides Synthesis and Applications
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Keywords
- layered double hydroxides, hollow nanospheres, arsenate adsorption, Cr(VI) adsorption, heavy metal removal, 4-nitrophenol reduction, gold nanoparticles, wastewater treatment, adsorption
- MeSH terms
- Adsorption, Hydroxides, Surface Properties, Time Factors, Water Pollutants, Chemical, Porosity, Magnesium Compounds, Water Purification, Metals, Heavy, Nanospheres, Iron Compounds
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