金属掺杂氧化铈柱撑蒙脱土改性沥青的老化行为及催化性能
Aging behavior and catalytic performance of asphalt modified by cerium oxide pillared montmorillonite
摘要
Abstract
In view of the low catalytic degradation efficiency of traditional photocatalytic materials in asphalt pavement,three kinds of metal(Cu,Fe,Mn)doped cerium oxide composite materials were synthesized using a combination of metal doping and co-precipitation methods.The evolution of their phase composition,changes in functional groups and extension of light absorption range were investigated.The high dispersion effect of CeO2 on the negative support was achieved,and the photoresponse of the new photocatalytic composite was improved.The rheological properties,high-temperature performance,aging resistance,and exhaust gas degradation efficiency of asphalt modified with different photocatalytic composite materials under gradient doping conditions were studied.The results show that the introduction of transition metal cations can reduce the band gap of the composites.When the dosage of photocatalytic composite materials is 4%(mass fraction),the high-temperature rheological properties,resistance to high-temperature deformation and aging resistance of the modified asphalt are significantly improved.When the dosage is 6%,Fe3+-doped CeO2 supported on pillar-modified montmorillonite has the best catalytic effect,achieving a degradation efficiency of 59.6%for NO,and an increase of 17.3%in degradation efficiency.关键词
光催化/金属掺杂/改性沥青/老化性能/尾气降解Key words
photocatalysis/metal doping/modified asphalt/aging performance/exhaust gas degradation分类
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刘帅,金娇,刘培,曾湘,高玉超,陈柏臻..金属掺杂氧化铈柱撑蒙脱土改性沥青的老化行为及催化性能[J].中南大学学报（自然科学版）,2024,55(3):1132-1145,14.基金项目
国家自然科学基金资助项目(52174237,51704040) （52174237,51704040）
湖南省杰出青年科学基金资助项目(2022JJ10051) （2022JJ10051）
德国优秀青年学者基金资助项目(GZ1717) （GZ1717）
长沙市杰出创新青年人才项目(kq2206031) （kq2206031）
广东省现代土木工程技术重点实验室开放课题(2021B1212040003) （2021B1212040003）
湖南省研究生科研创新项目(CX20230851,QL20230205)(Projects(52174237,51704040)supported by the National Natural Science Foundation of China （CX20230851,QL20230205）
Project(2022JJ10051)supported by the Science Foundation for Outstanding Youth of Hunan Province （2022JJ10051）
Project(GZ1717)supported by the Excellent Early Career Scientists of Germany （GZ1717）
Project(kq2206031)supported by the Science and Technology Project of Changsha-Outstanding Innovative Youth （kq2206031）
Project(2021B1212040003)supported by the Guangdong Provincial Key Laboratory of Modern Civil Engineering Technology （2021B1212040003）
Projects(CX20230851,QL20230205)supported by the Postgraduate Scientific Research Innovation Program of Hunan Province) （CX20230851,QL20230205）
