Comparative Photocatalytic Study of TiO2 Coatings on Al Fiber

The photocatalytic effects of 4 samples, which TiO2 layer uniformly coated on Al fiber, are evaluated by NOx removal. An anatase TiO2 coating with good crystal quality and high Ti content exhibits the best photocatalytic effect on NOx removal. It is coincidence with the results of XRD, XPS results for 4 samples. The photocatalytic ability is enhanced by the introduction of H2O2 due to the formation of large amount OH radicals.

Aspects of Crystal Quality of Si (100) Films Grown by Molecular Beam Epitaxy

ABSTRACTSilicon layers grown by molecular beam epitaxy, using both direct resistive heating and indirect radiant heating of the substrate, have been evaluated by photoluminescence measurements, diode I-V characterization, and chemical etching tests. The results show that large densities of defects could be introduced when resistively heated substrates were experiencing thermo-mechanical stress. Films with good crystal quality were grown using a carefully designed radiant type heater.