Spherical V-Fe-MCM-48: The Synthesis, Characterization and Hydrothermal Stability

Materials

Wang Qian²  Haiqing Wang²  Jin Chen²  Yan Kong¹ 

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

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

DOI  :  10.3390/ma8041752

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.