摘要
光催化剂在水泥基材料中的分散性问题一直是制约光催化水泥基材料性能的主要因素之一。本文通过在水泥基材料成型过程中加入铋系光催化前驱体溶液实现原位光催化水泥基材料的合成,提高光催化剂在水泥基体中的分散性,赋予水泥基材料光催化性能的同时改善水泥基体抗压强度。通过扫描电镜和EDS能谱对光催化水泥基材料微观结构和成分进行表征。结果表明,光催化水泥基材料对罗丹明B的降解效率最高可达91.64%,对氮氧化物的降解效率最高可达到15.03%,早期机械强度提升约10%。光催化剂在水泥基体中分散更加均匀,同时水泥基体致密度提高。本文揭示了原位光催化水泥基材料的光催化性能与机械性能的提升机制,为其他功能性水泥基材料的制备提供了理论基础。
The dispersibility of photocatalysts in cement-based materials has always been one of the important factors restricting the performance of photocatalytic cement-based materials. In this paper, photocatalytic cement-based materials were in-situ synthetized by adding bismuth-based photocatalytic precursor solutions in the molding process of cement-based materials. The dispersion of photocatalysts in cement matrix was improved. The photocatalytic properties to cement-based materials were imparted and the compressive strength of cement matrix was improved. The microstructure and composition of photocatalytic cement-based materials were characterized by scanning electron microscopy and EDS energy spectroscopy. The results show that the rhodamine B degradation efficiency of photocatalytic cement-based materials reaches up to 91.64%. The degradation efficiency of nitrogen oxides reaches up to 15.03%, and the early mechanical strength increases by about 10%. The photocatalyst is more uniformly dispersed in the cement matrix, and the density of cement matrix is improved. In this paper, the photocatalytic performance and mechanical performance improvement mechanism of in-situ photocatalytic cement-based materials are revealed, which provides a theoretical basis for the preparation of other functional cement-based materials.
作者
李俊杰
刘海龙
杨广磊
张丽娜
姜葱葱
程新
王丹
LI Junjie;LIU Hailong;YANG Guanglei;ZHANG Lina;JIANG Congcong;CHENG Xin;WANG Dan(Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials,University of Jinan,Jinan 250022,China;Shandong Winbond Construction Group Co.,Ltd.,Qingzhou 262500,China)
出处
《硅酸盐通报》
CAS
北大核心
2022年第10期3369-3376,共8页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(51902129)
山东省泰山学者攀登计划
济南市支持顶尖人才(团队)创新创业“一事一议”项目。
关键词
原位合成
光催化
BiOX
水泥
微观结构表征
机械强度
in-situ synthesis
photocatalysis
BiOX
cement
microstructure characterization
mechanical strength
