Date of Award
Doctor of Philosophy (PhD)
As advanced nanomaterials, inorganic-organic nano composites have received great interest as potential platform (nano) structures for sensor, catalyst, sorbent, and environmental applications. Here, my Ph.D. research has focused on the design, synthesis, and characterization of advanced water-stable engineered metal-oxide nanoparticles functionalized by organic frames for environmental applications. For the environmental applications, I have evaluated particleoptimized sorption processes for the remediation and separation of arsenic, chromium, and uranium under environmentally relevant conditions. More specifically, I have explored the critical role of organic coating on sorption mechanisms and performances using engineered iron oxide -based, manganese oxide -based, and manganese ferrite -based (core) nanoparticles with varying size, composition, surface coating and functional groups. With the application for environmental remediation of organic functionalized metal oxide nanoparticles, implication of advanced materials is another essential subject for environmental nano impact. As environmental implications, I fundamentally described material transport behavior(s), including aggregation and deposition in terms of surface organic matrix; I quantitatively explored the role of organic coating on collision and attachment of inorganic-organic nano composites for the environmental fate and transport of new nano platforms. Further, I evaluated highly stable organic coated superparamagnetic nanoparticles as potential draw solute for osmotic pressure driven membrane system to exploit paramagnetism of the particles. These works suggest better understanding of environmental application and implication for inorganic-organic nano composites.
John D. Fortner
Daniel E. Giammar, Yong-Shin Jun, Marcus B. Foston, Damena Agonafer,