Spherical V-Fe-MCM-48: The Synthesis, Characterization and Hydrothermal StabilityReportar como inadecuado




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State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China





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Academic Editor: Rafael Luque

Abstract Spherical MCM-48 mesoporous sieve co-doped with vanadium and iron was successfully synthesized via one-step hydrothermal method. The material was characterized by X-ray diffraction XRD, nitrogen adsorption-desorption isotherms, inductively coupled plasma ICP, scanning electron microscopy SEM, transmission electron microscopy TEM, diffuse reflectance UV-vis spectra, and X-ray photoelectron spectra XPS techniques. Results indicated that the V-Fe-MCM-48 showed an ordered 3D cubic mesostructure with spherical morphology, narrow pore size distribution and high specific surface area. Most of vanadium and iron atoms existing as tetrahedral V4+ and Fe3+ species were co-doped into the silicate framework. The particle sizes of V-Fe-MCM-48 were smaller and the specific area was much higher than those of of V-MCM-48. Additionally, the synthesized V-Fe-MCM-48 exhibited improved hydrothermal stability compared with the pure MCM-48. View Full-Text

Keywords: mesoporous sieve; MCM-48; co-doping; morphology; hydrothermal stability mesoporous sieve; MCM-48; co-doping; morphology; hydrothermal stability





Autor: Wang Qian, Haiqing Wang, Jin Chen and Yan Kong *

Fuente: http://mdpi.com/



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