摘要
光催化作为一种新兴的高级氧化技术,在环境净化领域有着诸多优势。采用两步简易的水热法制备了新型的FeWO4@ZnS异质结微球,SEM和XRD分析结果表明,ZnS微球是由硫化锌纳米颗粒组装而成的。EDS元素映射图表明,FeWO 4纳米粒子均匀地负载在ZnS微球表面。以新兴污染物四环素和偶氮染料亚甲基蓝为模型污染物,评价了各样品在模拟太阳光、可见光和可见光-芬顿体系中的光催化性能。结果表明,与单独的样品相比,异质结微球在模拟太阳光、可见光和光芬顿体系中对亚甲基蓝(MB)和四环素(TC)均表现出较高的降解活性。光催化性能的提高可以归因于异质结构的存在,其抑制了光生电子和空穴对的复合,加速了光生载流子的界面转移。除此之外,本研究还提出了上述各体系中光催化活性提高的可能的电子转移机理。新型高效FeWO4@ZnS异质结催化剂在未来环境净化领域具有潜在的应用价值。
Photocatalysis as an emerging advanced oxidation processes have enormous merits in environment purification area.The novel FeWO4@ZnS heterostructure microspheres were fabricated by a two-step hydrothermal method and the analysis of SEM and XRD shown that the ZnS microspheres were assembled by small ZnS nanoparticles.EDS elements mapping shown that the FeWO 4 nanoparticles were uniformly loa-ded on the surface of ZnS microspheres.The photocatalytic performance towarding to the azo dye MB and newly-developing TC were conducted in the case of UV-visible light,visible light and photo-Feton system.Results indicated that the heterostructure microspheres exhibits better activity compared with pure samples in three different system.The enhancement of photocatalytic can attributed to the presence of heterostructure which restrains the recombination of photoinduced electrons and holes and accelerates the interface transfer of photogenerated carriers.In addition,the possible electrons transfer mechanism of enhanced photodegradation performance were proposed.This novel and efficiency FeWO4@ZnS heterostructure photocatalyst may possesses potential application in the future environmental purification area.
作者
刘畅
丁博
杨贤峰
叶瑞雪
季益龙
代兵
吕辉鸿
LIU Chang;DING Bo;YANG Xianfeng;YE Ruixue;JI Yilong;DAI Bing;LYU Huihong(Key Laboratory of Metallurgical Emission Reduction and Resources Recycling,Ministry of Education,Anhui University of Technology,Maanshan 243002,China;Anhui Provincial Key Lab of Metallurgical Engineering&Resources Recycling,Anhui University of Technology,Maanshan 243002,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2020年第S02期78-83,共6页
Materials Reports
