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Síntesis por microondas de calcogenuros metálicos micro y nanoestructurados a partir de precursores elementales en

Kunlun Ding¹, Hong Lu, Yichi Zhang

¹Department of Chemistry and Biochemistry, University of California , Santa Barbara, California 93106-9510, United States.

Journal of the American Chemical Society

|October 22, 2014

Resumen

Los investigadores desarrollaron un método de síntesis verde para los calcogenuros metálicos utilizando precursores elementales y líquidos iónicos de fosfonio. Este enfoque escalable produce materiales cristalinos micro / nanoestructurados de manera eficiente a través del calentamiento por microondas.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
Química Inorgánica La Química Inorgánica es la química inorgánica.
Nanotecnología La nanotecnología es la nanotecnología.

Sus antecedentes:

Los calcogenuros metálicos son materiales cruciales con diversas aplicaciones.
Los métodos de síntesis existentes pueden ser complejos, exigentes desde el punto de vista ambiental o carecer de escalabilidad.
El desarrollo de rutas sintéticas eficientes y verdes es altamente deseable.

Objetivo del estudio:

Presentar un enfoque general, ecológico y escalable para la síntesis de micro/nanostructurados metal chalcogenides.
Para utilizar el azufre elemental, el selenio y el telurio como precursores.
Obtener productos de calogenuro de metal cristalino a través de una nueva vía de reacción.

Principales métodos:

Utilizando líquidos iónicos de fosfonio como medio de reacción debido a la alta solubilidad de los calcógenos.
Empleando el calentamiento por microondas para acelerar la reacción entre los calcógenos elementales y los polvos metálicos.
La caracterización de las resultantes cristales micro/nanostructurados metal chalcogenides.

Principales resultados:

Demostró la excelente solubilidad de azufre, selenio y telurio en líquidos iónicos de fosfonio.
Logró una cinética de reacción rápida entre los calcógenos elementales y varios polvos metálicos.
Se ha sintetizado con éxito calcogénidos metálicos cristalinos micro/nanoestructurados a partir de precursores elementales.
Se ha demostrado que el método desarrollado es universal y escalable.

Conclusiones:

El enfoque descrito ofrece una ruta ecológica, eficiente y escalable para la síntesis de calogenuros metálicos.
Los líquidos iónicos de fosfonio facilitan reacciones rápidas, lo que permite la formación de nanoestructuras cristalinas.
Este método proporciona una plataforma versátil para la producción de diversos materiales metálicos calcogenuro.

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