4.6 Article

Preparation of mesoporous silica-based nanocomposites with synergistically antibacterial performance from nano-metal (oxide) and polydopamine

Journal

NANOTECHNOLOGY
Volume 33, Issue 15, Pages -

Publisher

IOP Publishing Ltd
DOI: 10.1088/1361-6528/ac467a

Keywords

antibacterial performance; mesoporous silica nanocarriers; nano zinc oxides; silver nanoparticles; polydopamine

Funding

  1. Science Technology Program of Guangzhou, China [201903010011]
  2. Innovation Team of Modern Agricultural Industry Technology System of Guangdong Province [2019KJ140]
  3. Innovation Team Project by the Department of Education of Guangdong Province [2018KCXTD015]
  4. Guangdong University Key Laboratory for Substanable Control of Fruit and Vegetable Diseases and Pests [2020KSYS005]
  5. Research Project of Innovative Institute for Plant Health [KA21031H105]

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A novel antibacterial nanocomposite system was developed using mesoporous silica as an effective nanocarrier, demonstrating remarkable antibacterial performance due to the synergistic effect among nano zinc oxides, silver nanoparticles, and polydopamine. The presence of mesoporous silica effectively prevented the formation of large-size silver nanoparticles and facilitated their dispersion. The synergistic effect among nano zinc oxides, silver nanoparticles, and polydopamine resulted in significant antibacterial performance even at low concentrations.
In this work, a novel antibacterial nanocomposite system was developed using mesoporous silica (MSN) as an effective nanocarrier, and the resultant nanocomposites demonstrated remarkable antibacterial performance due to the synergistic effect among nano zinc oxides, silver nanoparticles, and polydopamine (PDA). The successful synthesis of MSN/ZnO@PDA/Ag nanocomposites was confirmed. The physicochemical properties and the morphologies of these nanocomposites were investigated. It was found that the particle size increased along with the evolution of these nanocomposites. Besides, nano zinc oxides were formed in the nanochannels of mesoporous silica with a particle size about 2 nm, and that of silver nanoparticle was less than 50 nm. In addition, the results revealed that the presence of mesoporous silica could effectively prevent the formation of large-size silver nanoparticles and facilitate their well dispersion. Due to the synergistic effect among nano zinc oxides, silver nanoparticles, and polydopamine, these nanocomposites exhibited remarkable antibacterial performance even at a low concentration of 313 ppm, and the antibacterial mechanism was also elucidated. Therefore, this work provides a facile and controllable approach to preparing synergistically antibacterial nanocomposites, and the remarkable antibacterial performance make them suitable for practical applications.

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