Antibacterial activity of photocatalytic electrospun titania nanofiber mats and solution-blown soy protein nanofiber mats decorated with silver nanoparticles

Yiyun Zhang, Min Wook Lee, Seongpil An, Suman Sinha-Ray, Shahrzad Khansari, Bhavana Joshi, Seungkwan Hong, Joo Hyun Hong, Jae Jin Kim, B. Pourdeyhimi, Sam S. Yoon, Alexander L. Yarin

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Highly porous photocatalytic titania nanoparticle decorated nanofibers were fabricated by electrospinning nylon 6 nanofibers onto flexible substrates and electrospraying TiO2 nanoparticles onto them. Film morphology and crystalline phase were measured by SEM and XRD. The titania films showed excellent photokilling capabilities against E. coli colonies and photodegradation of methylene blue under moderately weak UV exposure (≤ 0.6 mW/cm2 on a 15-cm illumination distance). In addition, solution blowing was used to form soy protein-containing nanofibers which were decorated with silver nanoparticles. These nanofibers demonstrated significant antibacterial activity against E. coli colonies without exposure to UV light. The nano-textured materials developed in this work can find economically viable applications in water purification technology and in biotechnology. The two methods of nanofiber production employed in this work differ in their rate with electrospinning being much slower than the solution blowing. The electrospun nanofiber mats are denser than the solution-blown ones due to a smaller inter-fiber pore size. The antibacterial activity of the two materials produced (electrospun titania nanoparticle decorated nanofibers and silver-nanoparticle- decorated solution-blown nanofibers) are complimentary, as the materials can be effective with and without UV light, respectively.

Original languageEnglish
Pages (from-to)35-40
Number of pages6
JournalCatalysis Communications
Volume34
DOIs
Publication statusPublished - 2013 Apr 5

Keywords

  • Antibacterial
  • Electrospinning
  • Keywords
  • Silver nanoparticles
  • Solution blowing
  • Soy protein
  • Titania

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Process Chemistry and Technology

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