Comparative Analysis of Titanium Dioxide Nanoparticles in Anatase vs. Rutile Crystal Phases for the Purpose of Water Treatment

Jeannette Isabella Calvin

Abstract


Gas Chromatography Mass Spectrometry (GC-MS) was used to analyze aqueous samples of known trichloroethylene (TCE) concentrations before and after treatment with titanium dioxide nanoparticles (TiO2 NPs).   TiO2 NPs were pressed into pellets and heated to 600°C for 2 hours in a furnace before being placed into glass vials containing aqueous TCE solution.  The zero-headspace vials were refrigerated until analysis.  Additionally, TiO2 pellets were assessed with X-ray powder diffraction yielding the result that 30 nm diameter anatase phase particles underwent full transition to rutile phase.  The results show that samples treated with TiO2 NPs of anatase or rutile crystal phase were not found to have mean TCE concentrations different than that of controls, and therefore it can be concluded that TiO2 NPs neither reacted with nor degraded TCE.


Keywords


Nanoparticles, Trichloroethylene

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