Open AccessStudy of nitric oxide degradation properties of photoactive concrete containing nitrogen and/or carbon co‐modified titanium dioxide – preliminary findings
Author(s) -
Janus Magdalena,
Zatorska Justyna,
Zając Kamila,
KusiakNejman Ewelina,
Czyżewski Adam,
Morawski Antoni Waldemar
Publication year - 2016
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2015.0423
Subject(s) - photocatalysis , titanium dioxide , materials science , anatase , catalysis , nitrogen , degradation (telecommunications) , ammonia , titanium , oxide , relative humidity , chemical engineering , composite material , chemistry , metallurgy , organic chemistry , telecommunications , physics , computer science , engineering , thermodynamics
In recent years, titanium dioxide (TiO 2 ) has been commonly applied in the production of photoactive concrete materials capable of degrading a wide range of air contaminant such as nitric oxide (NO), VOC etc. It was confirmed that the photocatalytic activity of TiO 2 can be further enhanced by modifying the photocatalyst with non‐metals such as nitrogen (N) or carbon (C). In view of this finding, several concrete/TiO 2 composites consisting of commercial concrete and raw anatase TiO 2 (supplied by Grupa Azoty Zakłady Chemiczne ‘POLICE’ S.A., Poland), previously modified with ammonia [N source] and/or 2‐propanol [C source] have been manufactured. For reference, the additional concrete samples were prepared, containing unmodified TiO 2 and commercial titania P25 (Evonik). The NO degradation properties of prepared photoactive concrete materials were evaluated using laboratory test set‐up. The measurements were conducted under constant temperature and humidity conditions, using ultraviolet light irradiation. Significant NO removal was recorded for the TiO 2 /concrete composites containing N and/or C co‐modified titania. The results were related to the improved photocatalytic activity of modified photocatalysts and probable, partial NO reduction to N 2 , via the selective catalytic reduction process catalysed by TiO 2 .