Abstract Facilitating the separation rate of photoactivated carries by building of heterojunctions is a valid way to tune the photocatalytic performance. In this contribution, Ti3C2/TiO2/BiOCl ternary heterojunction photocatalysts were prepared by a hydrothermal strategy. The fabricated heterostructures were examined using diverse analysis techniques. Surface photovoltage spectrum (SPS), photocurrent response (PR) and impedance spectroscopy (IS) results reveal that the separation behavior of photoactivated carries of Ti3C2/TiO2/BiOCl ternary heterojunctions was significantly improved in contrast with the reference BiOCl. Trapping and electron spin resonance (ESR) experiments indicate that construction of heterostructures among Ti3C2, TiO2 and BiOCl is propitious to the production of O2− and OH radicals. The photocatalytic activity can be profited from the improved separation efficiency of photoinduced carries and the elevated level of active species. The photocatalytic performance of the fabricated heterostructures was assessed by disinfection of rhodamine B (RhB) and tetracycline under simulated solar illumination. The investigation illustrate that the Ti3C2/TiO2/BiOCl ternary heterojunctions display boosted photocatalytic activities than the pristine BiOCl, the 4%Ti3C2/TiO2/BiOCl holds the best decontamination ability toward RhB. Moreover, the as-prepared Ti3C2/TiO2/BiOCl ternary heterojunctions possess excellent stability even after four cycles. In view of all the observations, separation and migration mechanism of the photoinduced carriers were proposed.

中文翻译：

---

MXene Ti3C2/TiO2/BiOCl 三元异质结的一锅水热合成具有改进的光活化载体分离和消除污染物的光催化行为

摘要 通过构建异质结来提高光活化载体的分离率是调节光催化性能的有效途径。在这项贡献中，Ti3C2/TiO2/BiOCl 三元异质结光催化剂是通过水热策略制备的。使用不同的分析技术检查制造的异质结构。表面光电压谱 (SPS)、光电流响应 (PR) 和阻抗谱 (IS) 结果表明，与参考 BiOCl 相比，Ti3C2/TiO2/BiOCl 三元异质结的光活化载体的分离行为得到显着改善。俘获和电子自旋共振 (ESR) 实验表明，Ti3C2、TiO2 和 BiOCl 之间异质结构的构建有利于 O2− 和 OH 自由基的产生。光催化活性可受益于光诱导载体分离效率的提高和活性物质水平的提高。通过在模拟太阳光照下对罗丹明 B (RhB) 和四环素进行消毒来评估所制造异质结构的光催化性能。研究表明，Ti3C2/TiO2/BiOCl 三元异质结显示出比原始 BiOCl 更高的光催化活性，4%Ti3C2/TiO2/BiOCl 对 RhB 具有最佳去污能力。此外，所制备的 Ti3C2/TiO2/BiOCl 三元异质结即使在四次循环后仍具有出色的稳定性。鉴于所有观察结果，提出了光生载流子的分离和迁移机制。