Abstract
Development of multifunctional material for efficient removal of indoor air pollutants, such as volatile organic compounds (VOCs) and bacteria, is an urgent need. Herein, Z-scheme CuxO/Ag/SrTiO3 (or STO) heterojunction photothermal catalyst is constructed and evaluated for the removal of chemical containment toluene and bacteria E. coli. The surface plasmon resonance effect of Ag nanoparticles and unique Z-scheme photogenerated charges transfer and separation route in CuxO/Ag/STO promotes the production of reactive oxygen species (OH and O2−). The photothermocatalytic synergistic function of CuxO/Ag/STO leads to an efficient toluene degradation performance. The coupling of photocatalytic disinfection by reactive oxygen species with chemical disinfection by Ag and CuxO with a high Cu+ content endows CuxO/Ag/STO with well antibacterial performance against E. coli. Such a coupling and strengthening concept and the corresponding multifunctional Z-scheme heterojunction show great application potential in indoor air purification field.
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