PHOTOCATALYTIC ACTIVITY OF NANOPARTICLES OF METAL SULFIDES IN THE DEGRADATION OF ORGANIC DYES

The photocatalytic degradation of dyes at the nanosized sulfides of transition metals in aqueous solutions was investigated. The rate of degradation increases with decrease in the synthesis temperature of the nanoparticles and with the addition of alcohol. The substitution of Cd2+ cations by Ag+ or Cu2+ leads to a decrease in the photoactivity of the CdS, while substitution by In3+ leads to an increase. The substitution of Ni2+ and Co2+ cations in the corresponding sulfides by Cd2+ leads to an increase in the rate of degradation.