Modulate 1O2 by passivate oxygen vacancy to boosting the photocatalytic performance of Z-scheme Mo2S3/BiOCl heterostructure

Enhance the concentration of singlet oxygen (O-1(2)) to ameliorate the photocatalytic performance is a promising strategy. Therefore, Z-scheme Mo2S3/BiOCl heterostructure with rational oxygen vacancies (OVs) was successfully synthesized by in-situ template method to tackle these issues. Characterization results reveal that the OVs were efficiently passivated by forming Mo-O bond at the interface of Mo2S3 and BiOCl. Moreover, the photocatalytic mechanism research reflects that the interfacial electric field not only enhance the spatial separation and migration efficiency of the photo-induced carriers but also benefit producing abundant O-1(2), and thus TC-HCl was purified 90.8% in 90 min. Meanwhile, the contribution of the reactive oxygen species to the photocatalytic activity and the formation path of O-1(2) were comprehensively studied for the first time. This work provides a new avenue to study the formation path of O-1(2) and offer a polishing strategy to mend the photocatalytic activity by modulate the concentration of O-1(2).

Automated summary

A Z-scheme Mo2S3/BiOCl heterostructure with rational oxygen vacancies (OVs) was successfully synthesized to enhance the photocatalytic performance and singlet oxygen (O-1(2)) concentration, achieving 90.8% purification of TC-HCl in 90 minutes by efficiently passivating the OVs and benefitting the generation of O-1(2). The contribution of reactive oxygen species to photocatalytic activity and the formation path of O-1(2) were comprehensively studied for the first time, providing a new avenue for studying O-1(2) formation and offering a polishing strategy to mend photocatalytic activity by modulating the O-1(2) concentration.