An effective way to incorporate nano-tio2 in photocatalytic cementitious materials

Ming Zhi Guo, Chi Sun Poon

Research output: Journal article publicationConference articleAcademic researchpeer-review

2 Citations (Scopus)


In this study, a spraying method was employed to coat nano-TiO2 particles on the surface of concrete surface layers. For comparison reasons, an intermixing method was also used to embed 5% nano-TiO2 particles in the testing samples. Photocatalytic degradation of NO was evaluated to compare their air-purifying efficiencies. A harsh abrasion was imposed on the testing samples to evaluate the resistance of the surface TiO2-particles to weathering. The results showed that after 7 days curing, all the TiO2 sprayed samples displayed higher photocatalytic NO removal activities than the TiO2 intermixed samples. After 28 days curing, a slight reduction in NO removal was observed. Although abrasion exerted a significant photocatalytic reduction on the TiO2 sprayed samples, they still retained a NO removal ability that was higher than that of the TiO2 intermixed samples.

Original languageEnglish
Article numbere261
JournalSustainable Construction Materials and Technologies
Publication statusPublished - 1 Jan 2013
Event3rd International Conference on Sustainable Construction Materials and Technologies, SCMT 2013 - Kyoto, Japan
Duration: 18 Aug 201321 Aug 2013


  • Cementitious materials
  • NO removal
  • Spraying
  • Titanium dioxide
  • Weathering

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • General Materials Science


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