Date of Award

5-2018

Document Type

Thesis

Department

Chemistry

Thesis Advisor

Matthew Maye

Thesis Advisor

Kelley Donaghy

Keywords

noncorrosive nanoparticles

Abstract


This thesis focuses on the chemistry for stainless nanoparticle synthesis in order to develop corrosion resistant nanoparticles. Syntheses within the Maye lab have been successful, however at the large scale these processes have been hindered by low yields as a result of byproduct formation and oxidation loss. This study addresses these problems by introducing a new precursor to synthesize the Fe core of FeCr/Ni stainless core/shell particles. Traditionally iron pentacarbonyl (Fe(CO)5 is used, but this study uses iron acetylacetonate (Fe(acac)3) as a substitute. Although the degradation of Fe(CO)5 is more commonly used and is understood relatively well, Fe(acac)3 is safer and less costly. Properly synthesized particles show high crystallinity and have immense magnetic capabilities. A comparison between the two precursors is completed in this work. The ability for Fe0 particles to act as a core for stainless particles and the effects of shells on the cores is also analyzed. Analysis of the particles was done using thermogravimetric analysis (TGA), Laser Ablation Induced Coupled Plasma Mass Spectrometry (LA-ICPMS), Physical Property Measurement System (PPMS), and x-ray diffraction (XRD).

These analysis methods allow for the approximate composition of the particles to be

determined and the approximate extent of oxidation to be estimated. Results of the study

show that Fe(acac)3 iron particles are less metallic than Fe(CO)5, suggesting that

Fe(acac)3 is not an effective substitute for Fe(CO)5. This shows that further research

needs to be completed in order to find a potential substitute or create a new route for the

successful creation of stainless nanoparticles.

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