具有增强光催化性能的ZnTiO/BiNbOCl异质结的构建

Gao Zhaoqun, Qu Xiaofei

College of Materials Science and Engineering, Qingdao University of Science and Technology, Zhengzhou Road 53, Qingdao, 266042, China.

Nanoscale Res Lett. 2020 Mar 27;15(1):64. doi: 10.1186/s11671-020-3292-4.

Constructing heterojunction is an effective strategy to enhance photocatalytic performance of photocatalysts. Herein, we fabricated ZnTiO/BiNbOCl heterojunction with improved performance via a typical mechanical mixing method. The rhodamine (RhB) degradation rate over heterojunction is higher than that of individual ZnTiO or BiNbOCl under Xenon-arc lamp irradiation. Combining ZnTiO with BiNbOCl can inhibit the recombination of photo-excited carriers. The improved quantum efficiency was demonstrated by transient-photocurrent responses (PC), electrochemical impedance spectroscopy (EIS), photoluminescence (PL) spectra, and time-resolved PL (TRPL) spectra. This research may be valuable for photocatalysts in the industrial application.

构建异质结是提高光催化剂光催化性能的有效策略。在此，我们通过典型的机械混合方法制备了具有改进性能的ZnTiO/BiNbOCl异质结。在氙弧灯照射下，异质结上罗丹明（RhB）的降解率高于单独的ZnTiO或BiNbOCl。将ZnTiO与BiNbOCl结合可以抑制光激发载流子的复合。通过瞬态光电流响应（PC）、电化学阻抗谱（EIS）、光致发光（PL）光谱和时间分辨PL（TRPL）光谱证明了量子效率的提高。这项研究对于光催化剂在工业应用中可能具有重要价值。