Zhang Zongyu, Xue Xiuling, Chen Xiaoyi
College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China.
Dalton Trans. 2022 May 24;51(20):8015-8027. doi: 10.1039/d2dt00737a.
A novel ternary dual Z-scheme 2D g-CN nanosheet/AgPO/α-BiO (CNN/AP/BO) photocatalyst was successfully synthesized by an deposition and hydrothermal-calcination method. The coupling of AP and BO remarkably enhanced the photocatalytic tetracycline (TC) degradation under visible light illumination, with an optimal removal efficiency of 91.6% (60 min), which can be attributed to the extended visible-light absorption and increased specific surface area owing to the interfacial intimate coupling with well-matched energy band positions between semiconductors. The improved photocatalytic activity resulted from the abundant free radicals by the order of ˙O > h > ˙OH based on the electron spin resonance (ESR) and quenching experiment results. In addition, the possible mechanism of TC degradation over the ternary dual Z-scheme heterojunction CNN/AP/BO was proposed.
通过沉积和水热煅烧法成功合成了一种新型三元双Z型二维g-CN纳米片/AgPO/α-BiO（CNN/AP/BO）光催化剂。AP和BO的耦合显著提高了可见光照射下光催化四环素（TC）的降解效果，最佳去除效率为91.6%（60分钟），这归因于由于半导体之间能带位置匹配良好的界面紧密耦合而导致的可见光吸收扩展和比表面积增加。基于电子自旋共振（ESR）和猝灭实验结果，光催化活性的提高源于大量自由基，其顺序为˙O > h > ˙OH。此外，还提出了三元双Z型异质结CNN/AP/BO上TC降解的可能机制。
