Heterogeneous Photocatalytic Degradation of Levofloxacin Hydrochloride by CdS QDs/La2Ti2O7
Photocatalysis degradation technology has been widely concerned because of its ability to use solar energy to efficiently degrade organic pollutants.Semiconductor quantum dots(QDs),such as CdS,have been widely used in the field of photocatalysis due to their advantages of narrow band gap and adjustable size.In this study,CdS QDs/La2Ti2O7 composite photocatalyst was prepared by in-situ hydrothermal method.The structure,morphology of catalyst and photocatalytic degradation of levofloxacin hydrochloride(LVF)were evaluated by XRD,TEM and UV-vis.We found that by adjusting the ratio of CdS QDs to La2Ti2O7,the photocatalytic activity could be significantly improved.Among them,CdS QDs/La2Ti2O7(2/1)showed the best photocatalytic efficiency,and its degradation rate of LVF could reach 90.9％within 30 min.This was mainly due to the formation of a tight heterostructure between CdS QDs and La2Ti2O7,which promoted the migration of photogenerated carriers and improved the photocatalytic activity.In addition,the catalyst showed good stability and reusability,demonstrating its potential for practical photocatalytic applications.
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