【摘要】 纳米TiO₂在紫外线的照射下,可将汽车尾气中有害的CO、HC及NO_x氧化为CO₂、H₂O、硝酸等无害物质,实现空气的净化。首先分析了纳米TiO₂光催化降解汽车尾气机理,然后研究了纳米TiO₂光催化水泥浆体的制备工艺与技术,通过试验分析了分散剂、分散方式、纳米TiO₂掺量等对光催化水泥浆体降解汽车尾气性能的影响规律。最后,研究了一种基于光催化产物的纳米TiO₂光催化水泥浆体降解汽车尾气性能的评价方法;将光催化水泥浆体应用于高速公路收费站,并对其光催化降解汽车尾气的性能进行了评价,结果表明,纳米TiO₂光催化水泥浆体具有优异的光催化性能和良好的应用前景。更多还原

【Abstract】 With irradiation of ultraviolet light,harmful ingredients like CO,HC and NOxin automobile exhaust could be oxidized and converted into harmless ingredients like CO₂,H₂O,HNO₃ and so on by nano-TiO₂,so as to implement the purification of air.At first,this paper analyzed photocatalytic mechanism of the nano-TiO₂ that degraded automotive exhaust,and then fabrication techniques and technology of nano-TiO₂ photocatalytic cement paste were studied.The effect rules that factors like dispersant,dispersion mode,nano-TiO₂ doped amount and so on influenced performance of nano-TiO₂ photocatalytic cement paste were studied by experiments.Finally,a new evaluation methodology that focused on photocatalytic products of nano-TiO₂ photocatalytic cement paste was studied.The photocatalytic cement paste was used in expressway toll station and the photocatalytic degradation performance of automotive exhaust was evaluated.The results showed that nano-TiO₂ photocatalytic cement paste had excellent photocatalytic performance and application prospect.更多还原