Influence of the properties of TiO2 particles on a photocatalytic acrylate polymerisation
作者： C. Damm , D. Völtzke , H.-P. Abicht , G. Israel
DOI: 10.1016/J.JPHOTOCHEM.2005.03.006
关键词:
摘要: Abstract Samples of TiO2 having different BET surface areas and numbers primary crystallites per secondary particle were prepared by annealing amorphous at temperatures. The photocatalytic activity these samples was checked using the polymerisation a trisacrylate as test reaction. Amorphous is not able to initiate used. maximum rate well monomer conversion after an illumination time 120 s increases with increasing number particle. That means it grain boundary area inside particles. To get better understanding properties photoelectric processes in investigated measurements transient photoelectromotive force (Photo-EMF). does show any Photo-EMF signal. This generate mobile charge carriers. For this reason, case no may be expected. measure efficiency separation A direct correlation between Umax acrylate photopolymerisation r p max shows that catalyst are great importance for its activity.
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