Photocatalytic degradation of alizarin red dye in aqueous medium using carbon nanotubes/Cu–Ti oxide composites

Multiwalled carbon nanotubes/copper and titanium oxides (MWNTs/Cu–Ti) and Cu–Ti composites were synthesized by wet chemical precipitation method and were used as photocatalysts for photodegradation of alizarin red dye in aqueous media. The morphological study presented that MWNTs are well covered by Cu–Ti. The formation of Cu–Ti was confirmed by energy dispersive X-rays (EDX) and X-rays diffraction (XRD). The MWNTs/Cu–Ti degraded about 92.51% within 180 min. The effect of other parameters like pH, catalyst dosage, and concentration of dye on the photocatalytic degradation was also studied. The activity of recovered and re-recovered catalysts was also studied.