期刊
ENVIRONMENTAL CHEMISTRY LETTERS
卷 2, 期 3, 页码 117-121出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10311-004-0087-2
关键词
photocatalysis; titanium dioxide; nitrogen oxides; photocatalytic efficiency
We studied the removal of nitrogen oxides pollutants via TiO(2) Degussa P25 powder by photocatalysis. Parameters such as mass of catalyst, geometric irradiated surface, catalyst morphology, and thermal treatment were tested to explain the photocatalytic concentration decrease of nitrogen oxides. According to our working conditions, the conversion rates increased until an optimal value of the TiO(2) weight, 35% of NO concentration and around 20% of NOx, was decomposed by the photocatalysis. The NOx removal increased proportionally with the irradiated geometric surface. The structural transformation of anatase to rutile performed by thermal treatment involved the decrease of the photocatalytic activity.
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