首页|ZnO-TiO2基地聚物微球的制备及对盐酸四环素的降解性能

ZnO-TiO2基地聚物微球的制备及对盐酸四环素的降解性能

Preparation of ZnO-TiO2 based geopolymer microspheres and degradation performance of tetracycline hydrochloride

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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-TiO2前驱体粉末;通过分散-悬浮-固化法制备成ZnO-TiO2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-TiO2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-TiO2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-TiO2 precursor powders were prepared by mixing method,solid-phase reaction method and sol-gel method.Secondly,ZnO-TiO2 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-TiO2 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-TiO2 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.

photocatalytic materialstetracycline hydrochloridecyclic performancesol-gel methodgeopolymer

王开拓、陶龙瑞、易敏、董德志、戴雨杏、李承泉、邱羽茜、覃琳乔

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广西大学资源环境与材料学院,广西南宁 530004

省部共建特色金属材料与组合结构全寿命安全国家重点实验室,广西南宁 530004

有色金属及材料加工新技术教育部重点实验室,广西南宁 530004

光催化材料 盐酸四环素 循环性能 溶胶-凝胶法 地聚物

国家自然科学基金

1210050705

2024

广西大学学报(自然科学版)
广西大学

广西大学学报(自然科学版)

CSTPCD北大核心
影响因子:0.767
ISSN:1001-7445
年,卷(期):2024.49(2)
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