Yiqun Liu of the Landskron Group

Graduate student Yiqun Liu will be presenting a research seminar on November 15, 2015 at 4:10 PM in Neville Hall, Room 3.

"Anionic Porous Organic Framework"

Porous organic frameworks (POFs) are an important class of porous materials for broad applications due to their excellent properties such as light weight, thermal and chemical stabilities, and high porosity.  POFs can be used in gas adsorption and storage, separation, catalysis, purification, optics, energy storage and conversion.  Here, we introduce new anionic porous organic frameworks (A-POFs) with phosphate functional groups.  These materials are stable in strong acidic and basic conditions and have BET surface areas up to 2,019 m2/g.  The carbon dioxide uptake capacities of the polymers reach up to 103 cc/g (1.0 bar and 273 K), making them promising candidates for CO2 capture. In addition, the polymers show superior adsorption capacities and rates when adsorbing organic pollutants from water.  For aqueous bisphenol A (BPA) adsorption, 1mg PAPOF-4 removes more than 90% of BPA from 80 mL 0.1 mM BPA solution within 1 hour.  It also rapidly removes various organic pollutants with a second order adsorption rate constants 10 times greater than peer materials. The material can be regenerated at least five times with no significant decrease in adsorption capacity.