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Mg 2TiO 4 spinel modified by nitrogen doping as a Visible-Light-Active photocatalyst for antibacterial activity

Authors
  • Chang, Shufang1
  • Hu, Yiwen1
  • Qian, Jun1
  • Shao, Yinlin1
  • Ni, Shuang2
  • Kong, Lulu1
  • Dan, Wenyan1
  • Luo, Chun1
  • Jin, Shu1
  • Xu, Xiaoxiang1
  • 1 Clinical and Central Lab, Putuo People’s Hospital, Department of Neurosurgery, Tongji Hospital, Tongji University School of Medicine, Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, China
  • 2 Science and Technology on Plasma Physics Laboratory, Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China
Type
Published Article
Journal
Chemical Engineering Journal
Publisher
Elsevier
Publication Date
Jan 06, 2021
Volume
410
Pages
128410–128410
Identifiers
DOI: 10.1016/j.cej.2021.128410
PMID: 33519294
PMCID: PMC7833804
Source
PubMed Central
Keywords
Disciplines
  • Article
License
Unknown

Abstract

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 (λ ≥ 400 nm). Complete disinfection of E. coli at a bacterial cell density of 1.0 × 107 CFU mL−1 can be achieved within merely 60 min. Mg2TiO4−xNy is capable of generating superoxide radicals (•O2−) 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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