摘要
以石墨相氮化碳(g-C_(3)N_(4))作为降解汽车尾气的光催化剂,将蒙脱土有机化处理后与三聚氰胺结合制备光催化复合材料(CNM),探讨g-C_(3)N_(4)和CNM的吸光特性和微观结构。制备g-C_(3)N_(4)和CNM改性沥青混合料,研究改性沥青混合料的高温稳定性、低温抗裂性和水稳定性,并探索g-C_(3)N_(4)和CNM改性剂及其改性沥青混合料对NO、CO和HC的光催化降解效果。研究结果表明:CNM在全波段范围内吸光度比g-C_(3)N_(4)的大,在波长为300~480 nm范围内吸光度显著提升;g-C_(3)N_(4)和CNM改性沥青混合料高温稳定性和水稳定性得到提升,且低温抗裂性满足规范要求;g-C_(3)N_(4)和CNM改性剂及其改性沥青混合料对NO的降解效果优于CO和HC对NO的降解效果,且CNM的降解效率高于g-C_(3)N_(4)的降解效率。
Graphitic carbon nitride(g-C_(3)N_(4))was selected as a photocatalyst for the degradation of automobile exhaust.Montmorillonite(DAC-OMMT)was combined with melamine to prepare photocatalytic composites(CNM).The g-C_(3)N_(4) and CNM-modified asphalt mixtures were prepared.The high-temperature stability,low-temperature crack resistance,and water stability of the modified asphalt mixtures were studied.The photocatalytic degradation effects of g-C_(3)N_(4) and CNM modifiers and their modified asphalt mixtures on NO,CO,and HC were explored.The results show that the absorbance of CNM is bigger than that of g-C_(3)N_(4) in the whole wavelength range and is remarkably improved in the wavelength range of 300-480 nm.The high-temperature stability and water stability of two types of modified asphalt mixtures are improved,and the low-temperature crack resistance meets the requirements of the specification.The degradation effect of g-C_(3)N_(4) and CNM modifiers and their modified asphalt mixtures on NO is better than that of CO and HC,and the degradation efficiency of CNM is better than that of g-C_(3)N_(4).
作者
金娇
陈晖文
张扮
刘帅
饶如意
李锐
JIN Jiao;CHEN Huiwen;ZHANG Ban;LIU Shuai;RAO Ruyi;LI Rui(School of Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China;National Engineering Research Center of Highway Maintenance Technology,Changsha 410114,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2024年第11期4226-4235,共10页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(52174237,51704040)
湖南省杰出青年科学基金资助项目(2022JJ10051)
德国优秀青年基金资助项目(GZ1717)
长沙市杰出创新青年科技项目(kq2305020)
长沙理工大学研究生科研创新计划项目(CLKYCX24124)。
关键词
蒙脱土
石墨相氮化碳
沥青混合料
汽车尾气
光催化降解
montmorillonite
graphite carbon nitride
asphalt mixture
automobile exhaust
photocatalytic degradation
