Liu Jiawei, Liu Jia, Zhang Zhilin, Lin Junhao, Wu ZiZhen, Jiang Qingyang, Gong Sicheng, Shi Jun, Deng Huiping
State Key Laboratory of Pollution Control and Resources Reuse, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
State Key Laboratory of Pollution Control and Resources Reuse, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
J Hazard Mater. 2025 Aug 15;494:138801. doi: 10.1016/j.jhazmat.2025.138801. Epub 2025 May 31.
The efficient removal of tetracycline (TC) while minimizing the formation of toxic intermediates remains a significant challenge. In this study, an interfacial Schottky junction of BiMoO/TiC(BMT) was designed, generated by the contact potential difference between TiC and BiMoO (BMO). The induction of work function and Fermi energy level was observed to generate a localized electrophilic/nucleophilic region that promotes the formation of free radicals. Self-driven charge transfer across the interface was found to increase the localized electron density on TiC, while the formation of Schottky barriers was observed to inhibit electron return and facilitate charge transfer and separation. The photocatalytic activity of BMT-5 under visible and near-infrared light radiation was significantly enhanced, resulting in an increased free radical content, which was identified using the probe method. With the assistance of LSPR and oxygen vacancies, BMT-5 achieved a removal efficiency of 99 % for tetracycline within 15 minutes, with a substantial reduction in the toxicity of the resulting intermediates. This study offers an innovative strategy for constructing electronic bridges in Schottky photocatalysts to enhance photocatalytic activity.
在尽量减少有毒中间体形成的同时有效去除四环素（TC）仍然是一项重大挑战。在本研究中，设计了一种BiMoO/TiC（BMT）界面肖特基结，它由TiC和BiMoO（BMO）之间的接触电势差产生。观察到功函数和费米能级的诱导产生了促进自由基形成的局部亲电/亲核区域。发现跨界面的自驱动电荷转移增加了TiC上的局部电子密度，同时观察到肖特基势垒的形成抑制了电子返回并促进了电荷转移和分离。BMT-5在可见光和近红外光辐射下的光催化活性显著增强，导致自由基含量增加，这是使用探针法确定的。在局域表面等离子体共振（LSPR）和氧空位的辅助下，BMT-5在15分钟内实现了99%的四环素去除效率，同时所得中间体的毒性大幅降低。本研究为在肖特基光催化剂中构建电子桥以增强光催化活性提供了一种创新策略。
