Synthesis of Mesoporous Transition‐Metal Phosphates by Polymeric Micelle Assembly |
| |
| Authors: | Dr Bishnu Prasad Bastakoti Dr Yunqi Li Dr Sudhina Guragain Dr Malay Pramanik Prof Saad M Alshehri Dr Tansir Ahamad Dr Zongwen Liu Prof Yusuke Yamauchi |
| |
| Affiliation: | 1. World Premier International (WPI), Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan;2. School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, Australia;3. Faculty of Science and Engineering, Waseda University, Tokyo, Japan;4. Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia |
| |
| Abstract: | Mesoporous iron phosphate (FePO4) was synthesized through assembly of polymeric micelles made of asymmetric triblock co‐polymer (polystyrene‐b‐poly‐2‐vinylpyridine‐b‐ethylene oxide; PS‐PVP‐PEO). The phosphoric acid solution stimulates the formation of micelles with core–shell‐corona architecture. The negatively charged PO43? ions dissolved in the solution strongly interact with the positively charged PVP+ units through an electrostatic attraction. Also, the presence of PO43? ions realizes a bridge between the micelle surface and the metal ions. The removal of polymeric template forms the robust framework of iron phosphate with 30 nm pore diameter and 15 nm wall thickness. Our method is applicable to other mesoporous metal phosphates by changing metal sources. The obtained materials were fully characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), N2 adsorption–desorption, Raman spectroscope, and other techniques. |
| |
| Keywords: | iron mesoporous materials metal phosphates micelles triblock co-polymers |
|
|
