Journal
NANO RESEARCH
Volume 8, Issue 5, Pages 1648-1658Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-014-0654-1
Keywords
graphitic carbon nitride; Ag/g-C3N4 nanohybrids; antibacterial platform; reactive oxygen species (ROS); biofilm
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Funding
- National Basic Research Program of China [2011CB936004, 2012CB720602]
- National Natural Science Foundation of China [21210002, 21431007, 91413111, 21402183]
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Semiconductor nanomaterials with photocatalytic activity have potential for many applications. An effective way of promoting photocatalytic activity is depositing noble metal nanoparticles (NPs) on a semiconductor, since the noble metal NPs act as excellent electron acceptors which inhibit the quick recombination of the photoexcited electron-hole pairs and thereby enhance the generation of reactive oxygen species (ROS). Herein, a highly effective platform, graphitic carbon nitride (g-C3N4) nanosheets with embedded Ag nanoparticles (Ag/g-C3N4), was synthesized by a facile route. Under visible light irradiation, the ROS production of Ag/g-C3N4 nanohybrids was greatly improved compared with pristine g-C3N4 nanosheets, and moreover, the nanohybrids showed enhanced antibacterial efficacy and ability to disperse bacterial biofilms. We demonstrate for the first time that the Ag/g-C3N4 nanohybrids are efficient bactericidal agents under visible light irradiation, and can also provide a new way for biofilm elimination. The enhanced antibacterial properties and biofilm-disrupting ability of Ag/g-C3N4 nanohybrids may offer many biomedical applications.
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