Ram Subedi

Ram Subedi

University of New Hampshire

Chemical Engineering


Mentor: Dr. Gonghu Li, Department of Chemistry

The effect of Morphology on Titanium Dioxide Photocatalysis

Over the past decade, there has been an increased interest in the use of titanium dioxide (TiO2) in solar energy conversion. This semiconducting material is inexpensive, non-toxic, stable, noncorrosive, and could potentially be highly active in heterogeneous photocatalysis. Using TiO2 in photocatalysis yields two major challenges; low absorption of light in solar energy conversion and the charge recombination of photochemically generated electron hole pairs. In this research, TiO2 nanorods doped with nitrogen will serve to inhibit charge recombination and improve solar harvesting by modifying the band gap of TiO2. The synthesis regarding the doping of TiO2 is adapted from previous research conducted by Shuan Wang et al. The photocatalytic activity will be measured by reducing CO2 using TiO2 nanorods with cobalt photocatalysts and compared to commercially available TiO2 nanoparticles.  The synthesized TiO2 nanorods will be characterized by electron microscopy, X-ray powder diffraction and UV-visible spectroscopy.


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