Catalytic disinfection: Quasi-dynamically monitoring bacteria sterilization based on CuNPs/ZnIn2S4 disinfectants and in-situ CuNPs regeneration.

As a novel sterilization technology (i.e. , catalytic disinfection), a disinfectant with high efficiency, economy, safety, and/or long lifespan is sought, while the mechanism is to be revealed. Herein, compared with noble Ag, Cu adopted has successfully modulated CuNPs/ZnIn 2 S 4 (Cu/ZIS) disinfectants via a green photodeposition at room temperature. The Cu/ZIS-driven catalytic disinfection under indoor lighting (Vis, 420 < λ < 630 nm) exhibited excellent bactericidal efficiencies of 100% both for P. aeruginosa (≥ 6 logs) and mixed bacteria in natural water (i.e. , Dongtiaoxi River), while it also functions as hindering bacteria regrowth and suppressing Cu loss. The bacteria death process (e.g. , cell membrane damage, intracellular compounds leaching) was studied via quasi-dynamically monitoring and a new action mechanism of Cu/ZIS with in-situ regeneration of Cu atomic clusters was also uncovered. These results provide a cheap well-designed disinfectant with a long lifespan, and a feasibility of catalytic disinfection for harmful microorganisms. [Display omitted] • A novel CuNPs/ZnIn 2 S 4 (Cu/ZIS) disinfectant was modulated by a green energy-saving method. • Ultra-efficient and broad-spectrum disinfection efficacy was achieved. • The process of bacterial death was quasi-dynamically monitored. • The disinfection mechanisms employed Cu/ZIS in visible light irradiation were elucidated. • A new action mechanism of Cu/ZIS with in-situ regeneration of Cu atomic clusters was uncovered. [ABSTRACT FROM AUTHOR]