Photocatalytic-adsorption Purification Performance of Pervious Concrete Containing TiO_(2)/LDHs-loaded Recycled Aggregates for Gas Pollutants  

作　　者：XU Yidong YANG Zhihang LI Shi-Tong YU Xiaoniu 徐亦冬;於孝牛

机构地区：[1]College of Civil Engineering and Architecture,NingboTech University,Ningbo 315100,China [2]School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China [3]Department of Civil Engineering,The University of Hong Kong,Hong Kong,China [4]School of Materials Science and Engineering,Southeast University,Nanjing 211189,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2025年第2期476-486,共11页武汉理工大学学报(材料科学英文版)

基　　金：Funded by the National Natural Science Foundation of China(No.52478281);the Natural Science Foundation of Zhejiang Province(No.LZ22E080003);the Science and Technology Project of Zhejiang Provincial Department of Transport(No.202225)。

摘　　要：The degradation performance of pervious concrete containing TiO_(2)/LDHs-loaded recycled aggregates for NO gas was analyzed using a gas phase catalytic degradation test device,simulating different environmental conditions such as load,ambient temperature,and illumination intensity,which provides theoretical support for practical engineering.The experimental results indicate that when the ambient temperature is controlled at 25℃and the illumination intensity is 30 W/m^(2),the sample prepared by soaking recycled aggregates in a 0.8%TiO_(2)/LDHs suspension exhibits the highest photocatalytic degradation rate for NO gas,reaching 72.54%.Further investigation on the influence of environmental temperature reveals that,at 25℃,the maximum photocatalytic degradation rate for NO gas is 72.9%.Moreover,at an illumination intensity of 40 W/m^(2),the maximum photocatalytic degradation rate for NO gas is 87.08%.Additionally,after three repeated photocatalytic tests,the sample demonstrates good stability,with a photocatalytic degradation rate of 58%.The nitrogen content in the eluent obtained from soaking the sample was determined to be 0.0022 mol/L,with a recovery rate of 80%.The adsorption experiment demonstrates that the sample exhibits a favorable adsorption effect on nitrate ions,reaching a maximum of 56.8%.

关 键 词：recycled aggregates pervious concrete TiO_(2)/LDHs NO gas degradation adsorption property 

分 类 号：O64[理学—物理化学]