Boosting nonradical process in BiOI/BiOCl heterostructure by interface oxygen vacancies

Boosting nonradical (O-1(2), e(-) and h(+)) process to enhance the selective degradation for electrophilicity contam-inants is an ingenious strategy. Herein, BiOI/BiOCl heterojunction with rational interface oxygen vacancies (IOVs) concentration was successfully synthesized by ultrasonic method. Moreover, multi-characterization and interference experimental unveiled that the appropriate IOVs concentration can not only effectively reduce the transport resistance of photo-induced carriers but also boost the nonradical process. Thus, BOC-5 can remove 84% (20 mg/L) tetracycline hydrochloride (TC-HCl) in 1 h and present wonderful insecticidal performance for rotifers. Simultaneously, the quantitative methods of IOVs concentration, the contribution of the active species to the catalytic performance and the contribution of different O-1(2) source to the total O-1(2) were established for the first time. Furthermore, the structure-activity relationship between the IOVs concentration and the catalytic properties was firstly constructed. This work provides an inventive idea to purify water pollutants and disin-festation by boost nonradical process via interface defect engineering.