The high-efficient g-C3N4/TiO2 composite photocatalyst was prepared,and added to matrix asphalt to form g-C3N4/TiO2 photocatalyst asphalt.The effect of g-C3N4/TiO2 on the performance of the asphalt were studied by FT-IR and AFM characterization methods.Furthermore,g-C3N4/TiO2 asphalt was added into chip seal to remove nitric oxide (NO) in automobile exhaust.The degradation experiment results showed that NO degradation efficiency of pure material was 82.47%,which was about 2 times compared with TiO2.FT-IR test showed that adsorption between g-C3N4/TiO2 and asphalt inhibited the formation of CO group.However,for the strength of sulfoxide base:aging photocatalytic asphalt>aging asphalt>matrix asphalt.AFM test showed that addition of g-C3N4/TiO2 photocatalyst made a more smoother asphalt surface.The results showed that the best NO degradation efficiency was 13.96% when the amount of photocatalyst was 138g/m2.
Deng Mei, Shan Bolin, Miao Chengcheng, Tang Boming, Yang Xiaoyu, Cao Xuejuan
. Performance and application of g-C3N4/TiO2 photocatalytic asphalt[J]. New Chemical Materials, 2021
, 49(4)
: 224
-227
.
DOI: 10.19817/j.cnki.issn1006-3536.2021.04.049
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