Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 12: Nanostructures at Surfaces II: Designer Structures and Surfaces

O 12.10: Vortrag

Montag, 1. April 2019, 17:30–17:45, H15

Development of Nanoporous & Mesoporous materials for Environmental Applications — •Chamila Gunathilake — Department of Chemical & Process Engineering, University of Peradeniya, Sri Lanka

Mesoporous silica & carbon materials with various organic pendant groups were developed for interesting applications including high temperature carbon dioxide (CO2) sequestration from power plant, treatment of wastewater streams, uranium extraction from seawater. Research is mainly focused on the incorporation of metal (aluminum, zirconium, calcium, and magnesium) species into mesoporous silica materials with organic pendant (amidoxime) and bridging groups (isocyanurate, benzene) for CO2 capture at elevated temperatures (60, 120 oC). All these hybrid materials synthesized by co-condensation followed by EISA showed high CO2 uptake at elevated temperature (60, 120 oC) reaching the CO2 sorption capacities in the range of 2.15-4.71 mmol/g. Mesoporous silica materials with diethylphosphatoethyl groups (DP-MS) and hydroxyphosphatoethyl pendant groups (POH-MS) were prepared for lead ions adsorption. High affinity of hydroxyphosphatoethyl groups toward lead ions (Pb2+) makes the POH-MS materials attractive sorbents for lead ions, which is reflected by high lead uptake reaching 272 mg of Pb2+ per gram of POH-MS. Amidoxime-modified ordered mesoporous silica (AO-OMS) materials are also attractive sorbents for uranium recovery as evidenced by very high uranium uptake reaching 57 mg of uranium per gram of AO-OMS under seawater conditions.

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