About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Porous Materials for Energy and Environment Applications
|
| Presentation Title |
Structural study of formation of (Bi0.2Na 0.2 K0.2Ba0.2Ca0.2)TiO3 Mesoporous High-Entropy Perovskites |
| Author(s) |
Patrice Prosper, Andrei Jitianu |
| On-Site Speaker (Planned) |
Patrice Prosper |
| Abstract Scope |
In the past five decades photocatalytic technology has gained much attention. Conventional photocatalysts like TiO2 (P25) possess challenges in solar energy conversion due to their wide bandgap, which allows a limited absorption in the UV domain. Disordered multicomponent materials have gained traction due to tunable composition, extended optical range and electrochemical properties. Noticeable are multicomponent High Entropy Perovskites (HEPs) with photocatalytic properties in the visible range. Our study focuses on HEPs prepared via sol-gel method. The studied (Bi0.2Na0.2Ba0.2K0.2La0.2)TiO3 contains five metal cations in equal stoichiometric ratios placed in crystallographic sites “A”. Hexadecyltrimethylammonium bromide (CTAB) and Brij 58 were employed to obtain mesoporous structures with surface area higher than 40m2/g. The TG-DTA shows that surfactants are decomposed at ~ 354oC or 212oC, with a clear effect of HEP formation at ~550oC. The structural characterization performed using X-Ray diffraction and FT-IR spectroscopy confirmed the crystallization of a single perovskite phase at 550oC. |