Plasma-catalytic methane pyrolysis for hydrogen production and synthesis of CNTs-nZVI nanocomposite for water remediation
Rattachement africain : cz. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
The development of efficient and sustainable materials for water remediation is essential to address the growing contamination of aquatic environments by potentially toxic metal(loid)s, while simultaneously reducing the environmental impact of material synthesis. In this work, carbon nanotubes-nano zerovalent iron (CNTs-nZVI) composites were produced via methane Plasma-Catalytic pyrolysis, a single-step, electrified, and solvent-free process that simultaneously converts methane into syngas and carbon nanomaterials. Produced syngas contained 79.6 ±3.7 vol.% hydrogen, 19.9 ±3.9 vol.% carbon monoxide, and 0.5 ±0.2 vol.% methane, which confirms more than 99% conversion. The CNTs-nZVI composite structure, consisting of single-walled CNTs and core-shell, iron-carbon nanoparticles with a metallic iron core, was confirmed by comprehensive microstructural, chemical, and textural characterization using TEM, STEM, EDS, BET, XRD, STA, XPS, and Raman spectroscopy. The remediation performance of the CNTs-nZVI composite was evaluated with nine metal(loid)s in water. The as-synthesized material showed rapid and highly selective removal of Pb(II) exceeding 96% within 24 hours. Thermal activation at 450 °C significantly enhanced long-term adsorption, achieving removal efficiencies of approximately 55% for Cr(VI) and Cu(II) and ~30% Cd(II) and As(V) after 48 days. Thermal activation also completely eliminates the volatile organic compounds present in as-synthesized CNTs-nZVI, as confirmed by GC-MS analysis. These results demonstrate the potential of the plasma-catalytic pyrolysis process to valorize methane and iron oxide into hydrogen-rich syngas and CNTs-nZVI composites, which can be used as sustainable water-treatment materials.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Plasma-catalytic methane pyrolysis for hydrogen production and synthesis of CNTs-nZVI nanocomposite for water remediation
- Date Crossref
- 01/10/2026
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
-
Czech University of Life Sciences Prague pays non établi dans la noticeUniversité ou école supérieure
-
Czech Academy of Sciences pays non établi dans la noticeStructure de recherche
-
University of Chemistry and Technology Department of Inorganic Chemistry pays non établi dans la noticeUniversité ou école supérieure
-
Czech Technical University in Prague pays non établi dans la noticeUniversité ou école supérieure
-
Faculty of Environmental Sciences Department of Environmental Geosciences pays non établi dans la noticeUniversité ou école supérieure
-
Faculty of Electrical Engineering Department of Electrotechnology pays non établi dans la noticeUniversité ou école supérieure
-
Faculty of Nuclear Sciences and Physical Engineering Department of Solid State Engineering pays non établi dans la noticeUniversité ou école supérieure
Czech University of Life Sciences Prague, Czech Academy of Sciences et Department of Inorganic Chemistry — University of Chemistry and Technology, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.