Bifunctional tubular step-scheme Co3S4/CdS heterostructure for highly efficient photoelectrochemical detection coupled with the degradation of tetracycline.

作者：Luping Feng, Jianghong Wang, Zhuang Xiao, Yujie Fan, Leyao Jin, Enjun Chen, Xinfeng Li, Peisong Tang, Lixiang Zhang · 发表于：Food Chemistry · 年份：2025 · DOI：10.1016/j.foodchem.2025.143746 · 被引用次数：14 · 研究领域：Medicine

A bifunctional tubular step-scheme Co3S4/CdS heterostructure was successfully synthesized for efficient photoelectrochemical (PEC) detection coupled with the degradation of tetracycline (TC). It was found that so-obtained heterostructure could effectively suppress the recombination of photo-generated carriers and display larger PEC responses owing to the internal electrostatic field. Upon adding TC, the photocurrent signal of Co3S4/CdS heterostructure was specifically activated due to the direct consumption of holes in CdS component by TC, resulting in significantly enhanced charge separation. Crucially, the photo-induced holes in CdS and produced •OH radicals can realize catalytic degradation of TC during its detection and the possible intermediates and degradation pathways were speculated. A dual-functional PEC sensing platform has thereby been developed for detection and degradation of TC with ultra-low detection limit and high degradation efficiency. Additionally, the developed sensor displayed excellent selectivity and high stability, demonstrating its potential for TC detection and degradation in tap-water and milk samples.