Several water pollution issues are frequently associated with the discharge of industries and municipal waste. Dyes from textile and paper manufacture can cause serious environmental problems because the toxic character of the compounds themselves and their corresponding byproducts. Quantum dots of Cd(Se,S), a fluorescent material, were used as photocatalytic agent in the degradation of methylene blue (MB) and Victoria blue (VB) under UV irradiation (302 nm) at pH 6.5. Quantum dots were characterized by X-ray diffraction (XRD), UV-Vis and photoluminescence techniques. The degradation of MB, VB and their photo-degradation products after 5 hours of UV irradiation were monitored using High Performance Liquid Chromatography (HPLC) at 600 nm. Titanium dioxide nanoparticles (Aeroxide P25), a well-known photocatalyst standard, were used to compare the efficiency of the QDs. The efficiency of the photodegradation process was strongly dependent on QDs concentration.

Photodegradation of organic dyes using quantum dots of Cd(Se,S) in aqueous solutions

249th National Meeting (2015)

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