Photocatalysis and Luminescence of Nanometer-sized CdS

Nanometer-sized CdS, as a typical II-VI semiconductor, has unique properties in luminescence and photocatalysis. In the experiment, nano-sized CdS embedded in PVA was prepared by coordination transformation method, and the luminescence property was determined. It could be found that the emission wavelength of the sample will be blue-shifted, and the extent of the blue-shift decreases gradually with the ratio of Cd/O increased. The photocatalyst of nano-sized CdS, which was used for photoreducing CO₂, was prepared by the same method on the double-support superfine SiO₂ and PVA. The photocatalytic activity of photoreducing CO₂ was tested and the results show that with the ratio of Cd/O increased, the size of CdS particle becomes large and its activity becomes weak. So from the luminescence and photocatalytic results, it could be found that there exist corresponding relationships between them at some extent