Piezocatalysis using piezoelectric polymers
US11932558B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2021 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | May 15, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2201/46115
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A piezoelectric polymer used as a piezocatalyst, and methods of manufacture and use therefor. A preferred piezoelectric polymer is poly(vinylidene difluoride) (PVDF) due to its piezoelectric response and good flexibility. The polymer can be doped with a metal, metal salt, metal carbonyl, metal oxide such as ZnO, Co2O3, or TiO2, or ion such as Cr3+, Co2+, or Zn2+. The dopant can be chosen so that when the polymer is PVDF the dopant increases the amount of β-phase PVDF and/or γ-phase PVDF relative to α-phase PVDF, thereby increasing the piezocatalytic response of the polymer. The compound to be decomposed can be adsorbed on the surface of the piezoelectric polymer. Applications include wastewater treatment, CO2 capture and reduction, hydroformylation, water splitting, and ammonia synthesis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.