Atom-level local structures of a ternary composite of cellulose and metal (hydro)oxides and its applications on lead ion capture
Discharging of lead-contained sewage has posed great threats to the ecological environment and human being health. To effectively eliminate Pb2+, a ternary composite cellulose/zinc oxide/magnesium hydroxide (labelled as CelZnMg) was prepared by a simple hydrothermal method. The XRD, SEM, TEM and XPS...
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Veröffentlicht in: | Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2025-01, Vol.705, p.135749, Article 135749 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Discharging of lead-contained sewage has posed great threats to the ecological environment and human being health. To effectively eliminate Pb2+, a ternary composite cellulose/zinc oxide/magnesium hydroxide (labelled as CelZnMg) was prepared by a simple hydrothermal method. The XRD, SEM, TEM and XPS were applied to analyze CelZnMg. It shows that ZnO particles and Mg(OH)2 sheet uniformly distribute on the surface of cellulose. Comprehensive density functional theory calculations realize that the composite has four structural arrangements at the atomic level. Its three components are chemically coupled, which in return stabilize the whole composite. Computationally and experimentally, CelZnMg can separate Pb2+ ions from water and immobilize them on the composite surface, where the removal efficiency reaches 99.7 %. The removal mechanism has been proposed.
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•Cellulose-derived ternary composite is studied by DFT and experimental means.•Cellulose substrate is entirely covered by granular ZnO and flaky Mg(OH)2.•Composite local structures at the atomic level are simulated by four models.•The chemically coupled components stabilize the whole composite.•Composite can effectively harvest lead nitrate via hydrogen and/or dative bonds. |
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ISSN: | 0927-7757 |
DOI: | 10.1016/j.colsurfa.2024.135749 |