Journal
CHEMICAL ENGINEERING JOURNAL
Volume 410, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.128410
Keywords
Photocatalyst; Visible light; Nitrogen doping; Mg2TiO4; Antibacterial activity
Categories
Funding
- National Natural Science Foundation of China [51972233]
- Natural Science Foundation of Shanghai [19ZR1459200]
- Shanghai Science and Technology Commission [14DZ2261100]
- Fundamental Research Funds for the Central
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Nitrogen-doped Mg2TiO4 spinel, designated as Mg2TiO4-xNy, has been synthesized and studied as a photocatalyst for antibacterial activity. It shows superior photocatalytic performance for E. coli disinfection under visible light, generating superoxide radicals that are crucial for bacteria disinfection. The presence of nitrogen dopants enhances the visible light sensitivity of Mg2TiO4-xNy, making it a promising candidate for water purification and antibacterial products.
Nitrogen doped Mg2TiO4 spinel, i.e. Mg2TiO4-xNy, has been synthesized and investigated as a photocatalyst for antibacterial activity. Mg2TiO4-xNy demonstrates superior photocatalytic activity for E. coli disinfection under visible light illumination (lambda >= 400 nm). Complete disinfection of E. coli at a bacterial cell density of 1.0 x 10(7) CFU mL(-1) can be achieved within merely 60 min. Mg2TiO4-xNy is capable of generating superoxide radicals (O-center dot(2)- ) under visible light illumination which are the reactive oxygen species (ROSs) for bacteria disinfection. DFT calculations have verified the importance of nitrogen dopants in improving the visible light sensitivity of Mg2TiO4-xNy. The facile synthesis, low cost, good biocompatibility and high disinfection activity of Mg2TiO4-xNy warrant promising applications in the field of water purification and antibacterial products.
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