Ordered mesoporous silica-NH2-MIL-53(Al) core-shell spheres of about 4 μm in diameter have been synthesized by seeding the corresponding mesoporous silica spheres (MSSs) with crystals of NH2-MIL-53(Al) and subsequent secondary crystal growth into a MOF shell. The morphology of the particles was analyzed by SEM, while TGA, EDX and XRD characterizations gave information on the composition and structure of this material and the activation of the MOF. N2 adsorption analysis revealed that the NH2-MIL-53(Al) shell controlled the access of guest molecules into the hydrophilic silica mesoporous structure, while the breathing behavior of the microporous NH2-MIL-53(Al) shell was confirmed by CO2 adsorption isotherms.
Bibliographical noteFunding Information:
Financial support from the Spanish Ministry of Economy and Competitiveness (MAT2013-40556-R), DGA Program fellowships (S. S.) from the Regional Government of Aragón and the ESF are gratefully acknowledged. We acknowledge the use Servicio General de Apoyo a la Investigación-SAI (Universidad de Zaragoza). All the microscopy work was done in the Laboratorio de Microscopías Avanzadas at the Instituto de Nanociencia de Aragón (LMA-INA). The authors acknowledge the LMA-INA for offering access to their instruments and expertise. Appendix A
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- Metal-organic framework
- Ordered mesoporous silica
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials