摘要
本研究以Ti O(OH)_(2)、Sr CO_(3)和ZnO为反应原料,采用熔盐法合成SrTiO_(3)/ZnO复合体,通过控制变量法,改变煅烧温度及时间,探究合成该复合体的最优反应条件,并对其产物进行光催化降解性能测定。采用X-射线衍射仪(XRD)和扫描电子显微镜(SEM)对产物进行物相表征和结构分析,结果表明,当煅烧温度为900℃、保温时间为3h时,所得产物颗粒大小和形貌最佳。进一步对产物的光催化性能进行探究,结果表明,在最优煅烧条件下合成的产物光催化性能最为优异,光催化降解率可达91%以上,3次循环后降解率仍能保持在74.41%,循环稳定性较好。自由基捕获实验结果表明,Ag NO_(3)作为电子清除剂,对光催化降解效率起到促进作用。该研究成果为SrTiO_(3)/ZnO复合体的高效合成及光催化应用提供了重要的实验依据和理论支持。
Titanic acid,strontium carbonate and zinc oxide were used as reaction raw materials to synthesize the SrTiO_(3)/ZnO composite by the molten salt method.Through the control variable method,the calcination temperature and time were changed to explore the optimal reaction conditions for the synthesis of this composite,and the photocatalytic degradation performance of its products was determined.The phase characterization and structural analysis of the product were carried out by XRD and SEM.The results showed that when the calcination temperature is 900℃and the holding time is 3h,the particle size and morphology of the obtained product are the best.The photocatalytic performance of the product was further investigated.The results showed that the photocatalytic performance of the product synthesized under the optimal calcination conditions was the most excellent,the photocatalytic degradation rate reaching more than 91%.After three cycles,the degradation rate could still be maintained at 74.41%,and the cycle stability was good.The results of the free radical capture experiment show that AgNO_(3),as an electron scavenger,promotes the efficiency of photocatalytic degradation.This research achievement provides important experimental basis and theoretical support for the efficient synthesis and photocatalytic application of the SrTiO_(3)/ZnO composite.
作者
王佳璐
杨湘莹
李姿源
李志坤
赵卫星
WANG Jia-lu;YANG Xiang-ying;LI Zi-yuan;LI Zhi-kun;ZHAO Wei-xing(College of Chemistry and Chemical Engineering,Baoji University of Arts and Sciences,Baoji 721013,China)
出处
《化学工程师》
2025年第9期6-11,共6页
Chemical Engineer
基金
陕西省教育厅科学研究计划项目资助(24JR005,24JP007)
宝鸡文理学院省级大学生创新训练计划项目(S202410721070)。
关键词
熔盐法
钛酸锶
氧化锌
光催化性能
molten salt method
strontium titanate
zinc oxide
photocatalytic performance
