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Aumentar las reacciones involucradas en el gas en el reactor de nanocanales con interfaces conjuntas
Li Mi1, Jiachao Yu1, Fei He1
1Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, School of Chemistry and Chemical Engineering, Southeast University , Nanjing 211189, China.
Journal of the American Chemical Society
|July 1, 2017
Resumen
Este estudio presenta un nuevo reactor de nanocanales que mejora las reacciones gas-líquido. Una interfaz hidrofóbica aumenta significativamente la eficiencia de la catálisis enzimática al mejorar el acceso al sustrato gaseoso.
Área de la Ciencia:
- Ciencias de los materiales
- Ingeniería Química
- Biotecnología
Sus antecedentes:
- La baja solubilidad de gas en soluciones acuosas limita la cinética de la reacción.
- Las reacciones gas-sustrato eficientes requieren interfaces optimizadas.
- Los reactores de nanocanales ofrecen potencial para reacciones interfaciales mejoradas.
Objetivo del estudio:
- Desarrollar un reactor de nanocanales con humedabilidad controlada para las reacciones de sustrato de gas.
- Investigar el efecto de la humedabilidad de la interfaz en la eficiencia de la reacción enzimática.
- Mejorar la eficiencia catalítica de las enzimas que utilizan sustratos gaseosos.
Principales métodos:
- Fabricación de una membrana de nanocanal de alumina anódica porosa (PAA).
- Modificación de la humedezabilidad del PAA para las interfaces controladas gas-líquido-sólido.
- Inmovilización de la glucosa oxidasa (GOx) dentro de los nanocanales.
- Contacto directo de la membrana del nanocanal con oxígeno gaseoso y solución acuosa de glucosa.
Principales resultados:
- El oxígeno (O2) participó directamente en la reacción enzimática a través de nanocanales de la fase gaseosa.
- Una interfaz hidrofóbica demostró una mayor eficiencia catalítica debido a la reorganización estructural de GOx y la adhesión del gas.
- La eficiencia catalítica de GOx inmovilizado aumentó hasta 80 veces en comparación con la enzima libre en solución acuosa.
Conclusiones:
- El reactor de nanocanales desarrollado con humedabilidad controlada supera efectivamente las limitaciones de solubilidad de gas.
- Las interfaces hidrofóbicas son cruciales para mejorar las reacciones enzimáticas entre el gas y el sustrato.
- Esta estrategia de interfaz trifásica es ampliamente aplicable para inmovilizar enzimas o catalizadores con sustratos gaseosos para una alta eficiencia.
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