Photocatalytic Hydrogen Production Using Coated TiO2 Substrate

Tuesday, October 18, 2011: 9:25 AM
102 F (Minneapolis Convention Center)
Njideka H. Okoye1, Pedro E. Arce1 and Dennis B. George2, (1)Chemical Engineering, Tennessee Technological University, Cookeville, TN, (2)Center for the Management, Utilization, and Protection of Water Resources, Tennessee Technological University, Cookeville, TN

This study provides insight regarding photocatalytic hydrogen production by a transparent thin film of TiO2 photocatalyst coated on a glass substrate doped with Platinum. The experiment was designed into two parts: The first part was on the manufacturing and physical characterization of titanium dioxide surface coating and the second part focused on hydrogen production. The TiO2 thin coatings were characterized by using different analytical methods, like X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and UV-Vis spectrophotometer. The effects of some hydrogen production variables such as volume percentage composition of ethanol and surface area of coated substrate were investigated over a period of two hour interval. Effectiveness of coatings on the substrate was tested by reusing the substrate with new solution of ethanol. From the analysis performed it was observed that hydrogen production rate significantly increased as percentage ethanol composition increased. Similar trend was also observed with respect to the increase surface area. The catalyst surface was also obsevered to be deactivated with further reusing.

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