最近 ,日本千叶县出现了一条神奇的高速公路 ,其“特异功能”是能自动吸收汽车排出尾气中严重污染环境的氮氧化物。原来 ,这条公路在铺路时添加了一种呈粉末状的光催化剂二氧化钛。当这种光催化剂被阳光中的紫外线照射后 ,汽车尾气中有毒的污染物质氮氧化物便与光催化剂中的氧 Recently, there appeared a magical highway in Chiba prefecture, Japan. Its “special function” is to automatically absorb the nitrogen oxides that are emitted from exhaust gas and pollute the environment. It turned out that the road in the pavement added a powdery photocatalyst titanium dioxide. When this photocatalyst is exposed to sunlight in the sun, the nitrogen oxides, which are toxic pollutants in the exhaust of vehicles, react with the oxygen in the photocatalyst