不同体积掺量的TiO_2-SiO_2气凝胶对复合砂浆光催化性能的研究  

Effect on the photocatalytic performance of mortar using different volume content of TiO_2-SiO_2 aerogels

作　　者：夏群[1] 陈培鑫 赵善宇[1,2] 朱平华 徐海珣[1] 王怡人[1] XIA Qun;CHEN Peixin;ZHAO Shanyu;ZHU Pinghua;XU Haixun;WANG Yiren(College of the Environment Department,Civil Engineering,Changzhou University,Building Energy Materials and Components Lab,Swiss Federal Lab of Materials Science and Technolog)

机构地区：[1]常州大学土木工程系环境学院,江苏常州213164 [2]瑞士联邦材料与工程实验室

出　　处：《混凝土》2018年第7期101-104,共4页Concrete

基　　金：国家自然科学基金(51408073;51678080;51678081)

摘　　要：具有锐钛矿相的Ti O_2-Si O_2气凝胶具有优异的光催化性能,试验将其与传统建筑材料复合,研究不同体积掺量的Ti O_2-Si O_2气凝胶对复合砂浆的密度、强度、导热性能及其光催化性能的影响规律。试验室自制的Ti O2-Si O2气凝胶取代骨料中的砂,取代率分别取0、40%、50%、60%、70%。结果表明:随着Ti O2-Si O_2气凝胶体积掺量的增加,砂浆的密度、抗压强度、抗折强度、导热系数均呈下降趋势,较未掺Ti O_2-Si O_2气凝胶的砂浆分别降低了56%、75%、59%、41%。而复合砂浆对甲基橙溶液的降解率随气凝胶体积掺量的增加,呈先升后降的趋势,当气凝胶体积掺量为60%时,降解效率达到最大,约80.24%。Ti O2-Si O2 aerogels,with excellent photocatalytic properties,compound with traditional architectural materials were tested to study the effect of different volume of Ti O2-Si O2 aerogels on the density,strength,thermal conductivity and photocatalytic properties of the composite mortar.Laboratory made Ti O2-Si O2 aerogels replace sand in aggregate,and the substitution rates are 0,40%,50%,60%,70%respectively.The results showed that with the increase of Ti O2-Si O2 aerogel volume,mortar density,thermal conductivity,compressive strength and flexural strength were decreased by 56%,75%,59%,41%compared with mortars without Ti O2-Si O2 aerogels.Nevertheless,the degradation rate of composite mortar to methyl orange solution increased first and then decreased with the volume fraction of aerogels expanding.When the volume fraction of aerogels was 60%,the degradation efficiency reached the maximum,about 80.24%.

关 键 词：保温砂浆 TiO2-SiO2气凝胶 导热性能 光催化性能 

分 类 号：TU528.01[建筑科学—建筑技术科学]