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Producción escalable y funcionalidad covalente de nanohojas WS para la fabricación de membranas y separación de iones
Yue Zhang1, Mingzi Sun2, Ruijie Yang1,3
1Department of Materials Science and Engineering and State Key Laboratory of Marine Environmental Health, City University of Hong Kong, Hong Kong S.A.R. 999077, China.
Nano letters
|February 9, 2026
Resumen
La producción escalable de membranas de disulfuro de tungsteno (WS2) mediante intercalación electroquímica permite una desalinización eficiente. Estas membranas WS2 logran altas tasas de rechazo para iones multivalentes, ofreciendo una solución prometedora para la escasez de agua dulce.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Nanotecnología La nanotecnología es la nanotecnología.
- Ciencias ambientales Ciencias ambientales.
Sus antecedentes:
- Las membranas de dicalcogenuro de metales de transición (TMD) muestran potencial para la desalinización a través del bloqueo de iones.
- La investigación se ha centrado principalmente en el disulfuro de molibdeno (MoS2) debido a los métodos de exfoliación fáciles.
Objetivo del estudio:
- Desarrollar una producción escalable de nanohojas de disulfuro de tungsteno (WS2) para la fabricación de membranas.
- Para evaluar el rendimiento de desalinización de las membranas WS2, en particular sus capacidades de rechazo de iones.
Principales métodos:
- Intercalación electroquímica optimizada de WS2 utilizando mayor densidad de corriente y menor voltaje de corte.
- Fabricadas membranas WS2 a través de la funcionalización de organohaluros y la filtración al vacío.
Principales resultados:
- Se lograron altas tasas de rechazo de hasta el 90% para cationes divalentes y trivalentes.
- Se ha demostrado la selectividad para cationes monovalentes/divalentes (hasta 8.7) y monovalentes/trivalentes (hasta 9.9).
- Los cálculos teóricos indicaron una mayor unión de cationes monovalentes a WS2 funcionalizado.
Conclusiones:
- La producción escalable de membranas WS2 es factible a través de una intercalación electroquímica optimizada.
- Las membranas WS2 funcionalizadas exhiben un excelente rendimiento en el rechazo de iones multivalentes, abordando la escasez de agua dulce.
- El estudio destaca el WS2 como una alternativa viable al MoS2 para aplicaciones avanzadas de desalinización.
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