@Article{, title={The Use of Photocatalytic Cementitious Coatings to Reduce Nitric Oxide from Ambient Air}, author={Maan S. Hassan and Riyad H. Al Anbari and Ayat H. Mahdi}, journal={Engineering and Technology Journal مجلة الهندسة والتكنولوجيا}, volume={36}, number={1 Part (C)}, pages={17-21}, year={2018}, abstract={Titanuim dioxide represents a novel photocatalyst material that can beused in different ways for air pollutants remediation. Air pollutants that arespreaded in the surrounding air could be transferred to more complex materials,especially in the presence of sunlight. To study the possibility for the reduction ofthese pollutants a laboratory tests have been conducted on the coated specimensubstrate by using nitric oxide as pollutant gas, and there efficiency in gasremoval was monitored with time. Two different particle sizes of TiO2 have beenused; micro with particle size range between 150-200 nm and nano PC105 withparticle size 20+ 5 nm, both are 100% anatse. Two coatings methods wereapplied on cementitious substrate material dip and spray to study thephotochemical reaction with TiO2, aqueous solution prepared by dispersing 3g/Lof TiO2 with deionized water and ethanol. Results show that using nano andmicro size TiO2 aqueous solutions were effective in the removal of nitric oxidewith variations in the time consumed for the removal. Using nano aqueoussolution in both dip and spray methods gives the same removal efficiency reachedto 98.85% ,while using micro aqueous solution the removal reached to 98.08%when dip method was used and 87.69% when spray method was used.

} }