The introduction of noble metals adsorbed on TiO2 substrates can affect the intrinsic catalytic properties of TiO2, however most research has been focused on single species of adsorbed noble metals. The properties of bi-metallic particles loaded onto TiO2 substrates, especially at the nanoscale, have yet to be extensively observed. Our research focuses on the fabrication of distinct noble bi-metallic nanoparticles loaded onto TiO2 particle arrays to closely observe the catalytic activity, chemistry, signal enhancement, and other potential projects that can lead to new observations. Sequential photodeposition of noble metals is accomplished through UV light exposure where metal precursors are reduced and deposited onto TiO2 linear nanoparticles in solution. Distinct Au or Pt nanoparticles have been deposited onto the surface of our TiO2 linear arrays as confirmed by SEM and TEM. Confirmation of metal species has been accomplished by XPS and EDS. Current research has been focused on the development of a method to co-deposit noble metal particles onto the surface of our TiO2 arrays. Our TiO2 arrays have also shown to photo-degrade methylene blue, the introduction of metal species might show progress in degradation. Previous work in our group has proved that polarized Raman spectroscopy performed on Ag nanoparticle arrays yields a significant increase in signal[1]. Similar enhancement may be observed from single or even bi-metallic nanoparticles loaded onto TiO2. TiO2 particles loaded with platinum nanoparticles. These particles will be examined for their SERS and pollutant degredation ability.

Fabrication of bi-metallic nanoparticles loaded onto TiO2 substrates

248th National Meeting (2014)

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