Highly-efficient photocatalytic disinfection of Escherichia coli by copper-doped molybdenum disulfide/bismuth sulfide under low-powered visible light irradiation

Reliable and affordable access to clean water has posted a threat in rural areas and fast expanding urban centers. Herein, a copper-doped MoS2/Bi2S3 photocatalyst is reported for photocatalytic bacterial disinfection. Under the irradiation of a single 18 W energy-saving light bulb, Cu-MoS2/Bi2S3 was able to achieve 100% inactivation of E. coli in 60 min. This high efficiency of Cu-MoS2/Bi2S3 can be attributed to its enhancement of light absorption and rapid electron-hole separation. This work provides a new insight into the potential use of energy efficient light source for water sanitation. [Display omitted] •Cu-doped MoS2/Bi2S3 photocatalysts were developed through solvothermal process.•Photocatalyst achieved 100% E. coli disinfection in 60 min using 18 W light bulb.•Reactive species test reviewed hydroxyl radicals and holes played an important role.