Ambient Light-Activated Antibacterial Material: Manganese Vanadium Oxide (Mn 2 V 2 O 7 ).
Jagriti SinghPrajwal B HegdePramod RavindraProsenjit SenSushobhan AvasthiPublished in: ACS applied bio materials (2021)
Antimicrobial surfaces can reduce the spread of bacteria from high-touch surfaces, saving millions of lives worldwide. Antibacterial photocatalytic films, like TiO 2 , are widely reported but limited in practice because they need high-intensity UV light. More practical but less reported are photocatalysts that work under low-intensity visible light from an indoor lamp. Here, we demonstrate that manganese vanadium oxide (MVO) is an antibacterial photocatalyst that works under light-emitting diode (LED) lights at ∼3000 lux. MVO is an earth-abundant semiconductor with a band gap of 1.7 eV that absorbs visible light to create reactive oxygen species (ROS) in water. ROS reduces bacteria counts by 4 orders of magnitude in 8 h under 9000 lux LED light. The antibacterial effect is significant even in MVO powder and films, which are amenable to large-area fabrication. MVO is a promising candidate for next-generation antimicrobial coatings that are stable, cheap, effective, earth-abundant, and activated by indoor lights.
Keyphrases
- visible light
- reactive oxygen species
- high intensity
- light emitting
- air pollution
- silver nanoparticles
- room temperature
- particulate matter
- staphylococcus aureus
- dna damage
- essential oil
- anti inflammatory
- cell death
- biofilm formation
- healthcare
- primary care
- wound healing
- health risk
- oxide nanoparticles
- ionic liquid
- pseudomonas aeruginosa
- metal organic framework
- candida albicans
- drinking water