The one-dimensional ZnWO4@SnWO4 photocatalyst with a core-shell heterostructure was successfully constructed by a simple two-step method. It is interesting to note that ZnWO4@SnWO4 composite photocatalyst owns a highe...The one-dimensional ZnWO4@SnWO4 photocatalyst with a core-shell heterostructure was successfully constructed by a simple two-step method. It is interesting to note that ZnWO4@SnWO4 composite photocatalyst owns a higher photocatalytic activity for Rh B degradation under visible light irradiation. The introduction of SnWO4 shell layer, which forms a clear heterogenous interface between ZnWO4 and SnWO4, increases the photo-absorption efficiency of ZnWO4 nanorods. In addition, its band-edge absorption evidently shifts toward the visible region. Based on the photoelectrochemical(PEC) and electron spin resonance(ESR) measurements, it is found that the photocatalytic activity was attributed to the efficient separation and transfer of photo-generated charge carriers. Hence, they can produced more hydroxyl radical(·OH) as the main active species in the photocatalytic reaction process.展开更多
基金supported financially by the Science and Technology Project of Education Department of Fujian Province (Nos. JAT170489, JAT160408 and JT180367)the Quanzhou Science and Technology Project (No. 2017Z031)+3 种基金the Advanced Research Fund of Quanzhou Normal University for Young Doctor (Nos. 2016YYKJ06 and 2016QBKJ05)the PhD Research Startup Foundation of Quanzhou Normal University (No. G16050)the Open Project Program of the State Key Laboratory of Photocatalysis on Energy and Environment (No. SKLPEE-KF201714),Fuzhou UniversityNatural Science Foundation of Fujian Province (Nos. 2015J05030 and 2016J01693)
文摘The one-dimensional ZnWO4@SnWO4 photocatalyst with a core-shell heterostructure was successfully constructed by a simple two-step method. It is interesting to note that ZnWO4@SnWO4 composite photocatalyst owns a higher photocatalytic activity for Rh B degradation under visible light irradiation. The introduction of SnWO4 shell layer, which forms a clear heterogenous interface between ZnWO4 and SnWO4, increases the photo-absorption efficiency of ZnWO4 nanorods. In addition, its band-edge absorption evidently shifts toward the visible region. Based on the photoelectrochemical(PEC) and electron spin resonance(ESR) measurements, it is found that the photocatalytic activity was attributed to the efficient separation and transfer of photo-generated charge carriers. Hence, they can produced more hydroxyl radical(·OH) as the main active species in the photocatalytic reaction process.
