Magnetic Fe2O3 nanospheres with PNH surface modification and application hereof in water treatment
US11325110B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2020 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Sep 12, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2305/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a magnetic Fe2O3 nanosphere with PNH surface modification and application thereof in water treatment. First, 2,2-bipyridyl-5,5′-dicarboxylic acid is reacted with thionyl chloride to obtain 2,2-bipyridyl-5,5′-diacid chloride; then 2,2-bipyridyl-5,5′-diacid chloride and 1,4,8,11-tetraazacyclotetradecane react in the presence of triethylamine to obtain a polynitrogen heterocyclic polymer; the polynitrogen heterocyclic polymer is added into an aqueous solution with iron salt to obtain a magnetic Fe2O3 nanosphere with PNH surface modification which has strong light absorption ability, which improves its ability to catalyze in degradation of tetracycline under visible light, so that the pollutants are removed from water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.