摘要
以钛酸四丁酯为钛源,AgNO_3水溶液为介质,室温下水解合成Ag-TiO_2复合材料,然后在不同温度下煅烧;并对材料进行XRD、SEM表征,最后测试其光催化活性.结果表明:煅烧温度能够影响复合材料的形貌、材料后续相变及其光催化活性.煅烧温度为600℃时,TiO_2为锐钛矿型并且形貌均匀、粒径均一;30 W紫外光照下100 min,复合材料对罗丹明B的降解效率为98.51%;煅烧温度为700℃时,TiO_2由锐钛矿型部分转变为金红石型,光催化降解效率开始下降(97.46%);800℃时,TiO_2已全部转化为金红石型,光催化降解效率为94.8%.该合成方法简单、温和、绿色环保、不引入任何模板剂,得到的材料光催化效果佳.
In this paper,Ag-TiO2 composites were prepared at room temperature by tetrabutyl titanate as titanium source,and AgNO3 aqueous solution was the medium,then the Ag-TiO2 composites were calcined at different temperature.These materials were characterized by XRD and SEM,and the photocatalytic properties were studied.The results showed that the calcination temperature had an effect on the structures,phase transition and photocatalytic activity of the prepared Ag-TiO2 composites.At 600℃,the prepared TiO2 was anatase with uniform morphology and particle size;Under 30 W UV light for 100 min,the degradation efficiency of the composite to rhodamine B was 98.51%.At 700℃,the prepared TiO2 changed from anatase to rutile,and photocatalytic degradation efficiency began to decrease(97.46%).At 800℃,TiO2 had been transformed into rutile and the photocatalytic degradation efficiency was 94.8%.The synthetic method is simple,mild,green and environment-friendly without introducing any templates.The obtained composites by this method have better photocatalytic performance.
作者
娄慧慧
王吉超
王秀婷
娄天军
LOU Huihui;WANG Jichao;WANG Xiuting;LOU Tianjun(School of Chemistry and Chemical Engineering,Henan Institute of Science and Technology,Xinxiang 453003,China;Xinxiang Municipal Key Laboratory of Functional Organic Molecular,Xinxiang 453003,China;Zhaoyuan Environmental Protection Agency,Zhaoyuan 265400,China)
出处
《河南科技学院学报（自然科学版）》
2019年第1期74-78,共5页
Journal of Henan Institute of Science and Technology(Natural Science Edition)
