The effect of UV illumination on the stability of ZnO particles in aqueous suspensions is investigated. The quantity of ZnO photodecomposed has been determined by measuring polarographically the resulting Zn(II) concentration in solution at different irradiation times, pH, and mass of semiconductor in suspension. The effect of different hole scavengers added to the solution in order to increase the stability of the semiconductor is also analyzed. Finally, some electrochemical measurements have been carried out with the aim to estimate the electron energy levels in the semiconductor particle under irradiation. © 1986 American Chemical Society.
|Journal||Journal of Physical Chemistry|
|Publication status||Published - 1 Dec 1986|