The main factors affecting the preparation of samarium (Sm) modified titanium dioxide (Sm-TiO2) photocatalyst were Sm content,heat treatment time and temperature.An orthogonal experiment was designed under ultrasonic assisted sol-gel method to explore the influence of three factors on the catalytic performance of Sm-TiO2.The results showed that the HC degradation rate of 0.3g pure Sm-TiO2 was 75.97% in 20 minutes,and Sm-TiO2 degradation rate of 0.118kg/m2 coating was 32% when was applied to fog seal.The usability of Sm-TiO2 fog seal material was evaluated by pavement anti-skid and seepage experiments.The results showed that the addition of Sm-TiO2 improved the water permeability of fog seal pavement.It showed that Sm-TiO2 can not only be used as photocatalytic material to alleviate environmental problems,but also as an external admixture to improve the water permeability of fog seal.The wear resistance of Sm-TiO2 fog seal material was evaluated by wet wheel wear test,and it showed that photocatalytic fog seal material had a certain photocatalytic activity.
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基金资助
重庆市高等职业技术院校新技术推广项目支持(GZTG201615);重庆工商职业学院校级科研项目资助(NDYB2018-07)
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