Ichiura H, Kitaoka T, Tanaka H
Department of Forest and Forest Products Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan.
Chemosphere. 2003 Jun;51(9):855-60. doi: 10.1016/S0045-6535(03)00049-3.
The photocatalytic oxidation of nitrogen oxides (NO(x)) over titanium dioxide (TiO(2)) sheets containing metal compounds (MCs) had been studied. Calcium oxide (CaO), magnesium oxide (MgO), calcium carbonate (CaCO(3)), aluminium oxide (Al(2)O(3)) and ferric oxide (Fe(2)O(3)) were used as MCs. Al(2)O(3) and Fe(2)O(3) added to the TiO(2) sheet did not affect the photooxidation of nitrogen oxides (NO(x)). The CaO sheet treated with TiO(2) sol had the greatest efficiency as a NO(x) remover under UV irradiation. It is believed that CaO has a high adsorptivity for nitrogen dioxide (NO(2)) and nitric acid (HNO(3)). The amount of NO(x) removed by a TiO(2) sheet including MC showed a tendency to increase with increasing pH of the MC suspension, i.e. there is a good correlation between the alkalinity of the MC and the retention of NO(2) and HNO(3).
已对含金属化合物（MCs）的二氧化钛（TiO₂）薄片上氮氧化物（NOₓ）的光催化氧化进行了研究。氧化钙（CaO）、氧化镁（MgO）、碳酸钙（CaCO₃）、氧化铝（Al₂O₃）和氧化铁（Fe₂O₃）被用作金属化合物。添加到TiO₂薄片中的Al₂O₃和Fe₂O₃不影响氮氧化物（NOₓ）的光氧化。用TiO₂溶胶处理过的CaO薄片在紫外线照射下作为NOₓ去除剂具有最高的效率。据信CaO对二氧化氮（NO₂）和硝酸（HNO₃）具有高吸附性。含MC的TiO₂薄片去除的NOₓ量呈现出随MC悬浮液pH值升高而增加的趋势，即MC的碱度与NO₂和HNO₃的保留之间存在良好的相关性。
