Synthesis, Characterization and Application of Phosphotungstic Acid /MCM- 41 Coated Nickel Ferrite | ||
| Mansoura Journal of Chemistry | ||
| Volume 45, Issue 3, August 2019, Pages 6-10 PDF (864.13 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/mjcc.2019.413009 | ||
| Abstract | ||
| Phosphotungstic acid (PWA) supported on MCM-41 coated nickel ferrite was prepared by impregnation of PWA. The samples have been characterized using X-ray analysis (XRD), Fourier Transform Infrared Spectroscopy (FT-IR) and Transmission Electron Microscopy (TEM). Acidity has been measured by using non-aqueous potentiometric titration of n-butylamine in acetonitrile and catalytic activity has been examined in synthesis of xanthene. The results indicated that the pore structure of MCM-41 was an ordered hexagonal and changed into spherical in MCM-41 coated nickel ferrite. The results showed also that there was an excellent dispersion of PWA on MCM-41 coated nickel ferrite surface. The acidity measurements indicated that the acidity and catalytic activity sharply increase by adding nickel ferrite and PWA to MCM-41.The sample doped with 55 wt. % PWA/MCM-41 coated nickel ferrite measures the highest surface acidity (592.4mV) with catalytic conversion reached to (94.7%). The catalysts can be separated from the reaction mixture by using a magnet. | ||
| Keywords | ||
| MCM-41; Nickel ferrite; xanthene; Phosphotungstic acid | ||
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