摘要
本研究通过简易水热法成功构建了Z型α-SnWO_(4)/g-C_(3)N_(4)异质结,通过多种表征手段(XRD、FT-IR、XPS、SEM、TEM、PL、EIS)证实了异质结的成功构建,该结构有效降低了电荷转移阻力,促进了光生载流子的分离。在可见光照射下,α-SnWO_(4)/g-C_(3)N_(4)对四环素表现出显著增强的光催化降解性能,其中α-SnWO_(4)/g-C_(3)N_(4)-0.1在60分钟内降解率达到94.2%,性能明显优于单一组分。此外,本文系统研究了溶液pH值和共存离子的影响,自由基捕获实验证实·O_(2)^(-)、h^(+)和·OH是主要活性物种,优异的性能归因于Z型电荷转移机制。此外,该材料表现出良好的循环稳定性和可重复使用性,在实际废水处理中具有应用潜力。
A Z-schemeα-SnWO_(4)/g-C_(3)N_(4) heterojunction was successfully constructed via a facile hydrothermal method.Comprehensive characterization(XRD,FT-IR,XPS,SEM,TEM,PL,EIS)confirmed the heterostructure formation,which effectively reduced charge transfer resistance and facilitated the separation of photogenerated carriers.As a result,the composite exhibited significantly enhanced photocatalytic activity for tetracycline(TC)degradation under visible light,withα-SnWO_(4)/g-C_(3)N_(4)-0.1 achieving 94.2%removal within 60 min,far surpassing the performance of pure g-C_(3)N_(4) orα-SnWO_(4).The effects of solution pH and coexisting ions were systematically investigated.Radical trapping experiments identified•O_(2)^(-),h^(+),and•OH as the primary active species,and the outstanding performance was attributed to the Z-scheme charge transfer mechanism.Furthermore,the composite demonstrated excellent recyclability and stability,showing great potential for practical wastewater treatment.
作者
黄斌艳
李斌
刘兴
Huang Binyan;Li Bin;Liu Xing(College of Life Sciences,Hengyang Normal University,Hengyang Hunan 421008,China;Changsha Ecological Environment Agency,Changsha Hunan 410013,China;Colleg of Chemistry and Materials Science,Hengyang Normal University,Hengyang Hunan 421008,China)
出处
《衡阳师范学院学报》
2025年第6期105-113,共9页
Journal of Hengyang Normal University
基金
湖南省功能金属有机化合物重点实验室基金项目(2023HSKFJJ008)。
