Scheme MoS/TiO/graphene nanohybrid photocatalysts for visible light-induced degradation for highly efficient water disinfection and antibacterial activity

We fabricated MoS 2 /TiO 2 /graphene (MTG) nanohybrids using a hydrothermal process in the preparation of heterostructure photocatalysts. The MTG nanohybrids exhibited high stability, large specific surface area, and visible light response. The heterostructure nanohybrids were effective in the visible-light photodegradation of tetracycline (TC), rhodamine B (RhB), and congo red (CR), as well as Pb( ii ) reduction. The nanohybrids exhibited a photocatalytic TC removal capability of 94.5% with 60 min of visible light irradiation. Suppressing the recombination of photoexcited electron-hole pairs enhanced the removal of environmental pollutants. The MTG nanohybrids also displayed photocatalytic reduction of Pb( ii ), approximately 10-15 times that of bare MoS 2 and TiO 2 samples. The nanohybrids also showed efficient photocatalytic antibacterial performance, killing 99.9% of E. coli in 10 min, thus demonstrating environmental friendliness in water disinfection. The results clearly demonstrated promising nanohybrids for the photocatalytic removal of a wide variety of contaminants, such as hazardous organic chemicals, heavy metals, and pathogenic microbes, under visible light irradiation. A new Z -scheme MoS 2 /TiO 2 /graphene nanohybrid effectively degraded antibiotics, heavy metals and microorganisms under visible irradiation.