Versatile photocatalytic functions of self-compacting architectural glass mortars and their inter-relationship

Ming Zhi Guo, Anibal Maury-Ramirez, Chi Sun Poon

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)

Abstract

Interests in the combined use of titanium dioxide (TiO2) photocatalyts with cementitious materials to produce functional cement based photocatalytic products (PCP) have attracted increasing research attention. However, an effective method to obtain a high photocatalytic efficiency, thus multiple photocatalytic functions, is in strong demand. This study investigated the strategy of directly applying a TiO2containing paint on the surface of self-compacting architectural mortars (SCAM). For comparison, 5% TiO2-intermixed SCAM samples were also prepared. The results showed that the TiO2coated SCAM sample displayed a high photocatalytic NOxand xylene removal ability under UV-A and Sunlight irradiation conditions. In contrast, 5% TiO2-intermixed samples only achieved a significantly lower NOxremoval efficiency, and failed to degrade xylene. In addition, the TiO2coating on the SCAM surface also demonstrated a high rhodamine B (RhB) degradation ability. Moreover, a total inactivation of Escherichia coli was observed after 120min UVA irradiation for the TiO2coated SCAM. Whereas, the 5% TiO2-intermixed SCAM only exhibited a negligible E. coli killing activity. All the architectural mortar samples were found to have a low bioreceptivity. Overall, the TiO2coated SCAM has the potential to be used as environmentally-friendly products for air-purifying, bactericidal and self-cleaning applications.
Original languageEnglish
Pages (from-to)1260-1268
Number of pages9
JournalMaterials and Design
Volume88
DOIs
Publication statusPublished - 25 Dec 2015

Keywords

  • Anti-algae fouling
  • Anti-bacteria
  • Photocatalytic NO removal x
  • Rhodamine B degradation
  • Xylene degradation

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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