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Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle

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Reactividad fotoquímica del grafeno

Haitao Liu¹, Sunmin Ryu, Zheyuan Chen

¹Department of Chemistry and Columbia University Center for Electronics of Molecular Nanostructures, Columbia University, 3000 Broadway, New York, New York 10027, USA.

Journal of the American Chemical Society

|November 12, 2009

Resumen

Los investigadores descubrieron una reacción fotoquímica entre el grafeno y el peróxido de benzoilo, creando defectos localizados. El grafeno de una sola capa mostró una reactividad significativamente mayor, lo que sugiere que el grafeno fotoexcitado inicia la descomposición del peróxido de benzoilo.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
La fotoquímica es la fotoquímica.
Ciencias de la superficie Ciencias de la superficie.

Sus antecedentes:

Las propiedades electrónicas únicas del grafeno lo convierten en un candidato para la fotocatálisis.
El peróxido de benzoilo es un iniciador común para reacciones radicales.

Objetivo del estudio:

Para investigar la interacción fotoquímica entre el grafeno y el peróxido de benzoilo.
Para comprender el mecanismo de formación de defectos en el grafeno.

Principales métodos:

Experimentos de reacciones fotoquímicas.
Caracterización de los defectos del grafeno.

Principales resultados:

Se demostró una reacción fotoquímica entre grafeno y peróxido de benzoilo.
Se introdujeron defectos espacialmente localizados en el plano basal del grafeno.
El grafeno de una sola capa exhibió una reactividad aproximadamente 14 veces mayor que el grafeno de doble capa.

Conclusiones:

El grafeno fotoexcitado facilita la descomposición del peróxido de benzoilo.
El mecanismo implica la transferencia de electrones calientes del grafeno al peróxido de benzoilo, induciendo la formación de radicales fenilo.

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