377535 Solar Photocatalytic Oxidation of NO By Electronspun TiO2/ZnO Composite Nanofiber Mat for Enhancing Indoor Air Quality

Tuesday, November 18, 2014: 9:50 AM
308 (Hilton Atlanta)
Carina Chun Pei, Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong and Wallace Woon-Fong Leung, Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong

Synthetic photocatalyst TiO2 nanofibers prepared using a sol-gel assisted electrospinning method revealed higher activity than the commercial photocatalyst TiO2, P25, in the photocatalytic oxidation (PCO) of NO. The inner nanopores structure of nanofibersas observed from the transmission electron microscopy (TEM) image was found to be the vital parameter for the increased activity of the photocatalyst. The TiO2/ZnO composite nanofiber photocatalysthas lower band gap than TiO2 nanofiber which favors photo-electron generation. It would have potentially higher photocatalytic efficiency if not for the fact that the introduction of ZnO might cause charge imbalance and formation of the unsaturated chemical bonds on the surface thus changing the surface oxygen vacancies of the catalyst responsible for generating the oxidation radicals. Photocatalytic efficiency was optimized by adding an appropriate amount of Zn (0.10 wt. %) to the TiO2, and this percentage of Zn added to the composite was in accord with the X-ray photoelectron spectroscopy measurement.


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See more of this Session: Catalyst Design for Environmental Applications
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