摘要
为了解决光催化材料存在可见光利用率低,降解完成后难沉降、回收率低,原料和运行成本高等问题,采用混合法、固相反应法和溶胶凝胶法制备不同ZnO-TiO_(2)前驱体粉末;通过分散悬浮固化法制备成ZnO-TiO_(2)基地聚物微球;通过氙灯模拟可见光条件,探究其对盐酸四环素的降解性能。结果表明,溶胶凝胶法制备的ZnO-TiO_(2)基地聚物微球对盐酸四环素的降解性能最好。在pH=5、时间为150 min和固液比为1.5 g/L的条件下,溶胶凝胶法制备的ZnO-TiO_(2)基地聚物微球对盐酸四环素的降解率达到98.71%,在循环利用4次后,其降解效率仍能达到90%以上,羟基自由基(·OH)在光催化反应中起主要作用。
Currently,photocatalytic materials suffer from low visible light utilization,difficulty in settling after degradation completion,low recovery rate,and high raw material and operating costs.To address the above problems in this study,firstly,different ZnO-TiO_(2) precursor powders were prepared by mixing method,solid-phase reaction method and sol-gel method.Secondly,ZnO-TiO_(2) based geopolymer microspheres were prepared by dispersion-suspension-curing method.Finally,their degradation performance on tetracycline hydrochloride was investigated by simulating visible light conditions through xenon lamp.The results showed that the ZnO-TiO_(2) based geopolymer microspheres prepared by the sol-gel method have the best degradation performance on tetracycline hydrochloride.Under the conditions of pH=5,time 150min and solid-liquid ratio of 1.5 g/L,the degradation efficiency of tetracycline hydrochloride on ZnO-TiO_(2) based geopolymer microspheres prepared by sol-gel method reach 98.71%,and the degradation efficiency can still reach more than 90%after four times of recycling,and the analysis indicating that hydroxyl radical(·OH)plays a major role in this photocatalytic reaction.
作者
王开拓
陶龙瑞
易敏
董德志
戴雨杏
李承泉
邱羽茜
覃琳乔
WANG Kaituo;TAO Longrui;YI Min;DONG Dezhi;DAI Yuxing;LI Chengquan;QIU Yuqian;QIN Linqiao(School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China;State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,Guangxi University,Nanning 530004,China;MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials,Guangxi University,Nanning 530004,China)
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2024年第2期400-408,共9页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金项目(1210050705)。
关键词
光催化材料
盐酸四环素
循环性能
溶胶凝胶法
地聚物
photocatalytic materials
tetracycline hydrochloride
cyclic performance
sol-gel method
geopolymer
