Open AccessPhotocatalytic disinfection of bacteria under visible light irradiation by BiFeO3 photocatalyst
Author(s) -
Nur Atiqah Daub,
Farhana Aziz,
Nor Azimah Mohd Zain,
WoeiJye Lau,
Norhaniza Yusof,
Wan Norharyati Wan Salleh,
Juhana Jaafar
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1142/1/012002
Subject(s) - photocatalysis , visible spectrum , irradiation , transmission electron microscopy , materials science , photochemistry , nuclear chemistry , nanoparticle , staphylococcus aureus , scanning electron microscope , bacteria , nanotechnology , chemistry , catalysis , optoelectronics , biology , organic chemistry , composite material , physics , nuclear physics , genetics
BiFeO 3 nanoparticles was synthesized by sol gel auto combustion. The as-synthesized BiFeO 3 were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectra (DRS) and Brunauer-Emmett-Teller (BET) analysis. The disinfection activities towards Gram-positive Staphylococcus aureus (S.aureus) were examined under visible light irradiation. The results showed a complete inactivation of 3 × 10 6 CFU/mL S.aureus was achieved within 20 min. The disruption of bacterial cell structure was observed by Transmission electron microscope (TEM). The cells were severely damaged after being exposed to BiFeO 3 under visible light irradiation. Hence, the results demonstrated the potential application of perovskite-type photocatalyst, BiFeO 3 in photocatalytic disinfection of various microorganisms.