Spectroscopic investigations on the photodegradation of toluidine blue dye using cadmium sulphide nanoparticles prepared by a novel method

► The work reported in this article involves a novel method to prepare CdS Nps. ► Effect of pH on the photocatalytic activity of CdS Nps to degrade TB dye was very significant. ► 90% of TB degradation was observed in the photodegradation experiment carried out at pH 8.