Antibacterial and water purification activities of self-assembled honeycomb structure of aerosol deposited Titania film

Jung Jae Park, Jong Gun Lee, Do Yeon Kim, Joo Hyun Hong, Jae Jin Kim, Seungkwan Hong, Sam S. Yoon

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

A simple and rapid room-temperature aerosol deposition method was used to fabricate TiO2 films for photokilling/photdegradation applications. TiO2 particles were accelerated to supersonic speeds and fractured upon impacting a glass substrate to form a functional thin film, a process known as aerosol deposition. After deposition, the films were annealed at various temperatures, and their photokilling/photodegradation performances following ultraviolet (UV) exposure were evaluated by counting the number of surviving bacterial colonies, and by a methylene blue decolorization test. The photocatalytic performances of all TiO2 films were obtained under weak UV exposure (0.6 mW/cm2). The film density, crystalline phase, and surface roughness (morphology) were measured by scanning electron microscopy, X-ray diffraction, UV-visible spectroscopy, and atomic force microscopy. The unique, self-assembled honeycomb structure of the aerosol deposited films contributed to the increase in surface area because of extreme roughness, which enhances the photokilling and photodegradation performance. Nonannealed films yielded the best photocatalytic performance due to their small crystalline sizes and large surface areas due to increased surface roughness.

Original languageEnglish
Pages (from-to)12510-12518
Number of pages9
JournalEnvironmental Science and Technology
Volume46
Issue number22
DOIs
Publication statusPublished - 2012 Nov 20

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

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