CATL 29 |
| We have recently begun to re-examine the use of ultrasonic spray pyrolysis (USP) for materials synthesis and particularly the development of new materials for photocatalytic water splitting. Although USP and spray pyrolysis more generally are well-established techniques that remain in heavy industrial use, the chemical reactions that take place are generally within solid particles formed after solvent evaporation. By the introduction of high boiling liquids or relatively low melting salts, we have found new and interesting approaches to the USP synthesis of semiconductor quantum dots, unusual morphologies of metal oxides and sulfides, and micro- and macro-porous carbon networks. Our goals are to investigate nanoheterojunctions of metal oxides as photocatalytic centers. By using spatially indirect band gaps and smaller band gap mixed metal oxides, we have developed new and active photocatalysts for the production of hydrogen from the visible light photolysis of water. |
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Photocatalysis
1:30 PM-4:50 PM, Tuesday, August 21, 2007 BCEC -- 261, Oral
Catalysis & Surface Science Secretariat |