【摘要】 在去除盐酸四环素（TC）方面，光催化技术被认为是一种高效和绿色的方法，可满足可持续发展的需求。本研究采用简单的搅拌过程来构建具有多级结构的Ti₃C₂/Bi₁₂O₁₇Br₂ （命名为TBOB）肖特基异质结，其中Bi₁₂O₁₇Br₂组分紧密地沉积在Ti₃C₂表面。通过模拟太阳光下降解TC来评价所有样品的光催化性能。与Bi₁₂O₁₇Br₂相比，所制备的TBOB复合材料表现出更好的光降解活性，活性的增强归功于Ti₃C₂和Bi₁₂O₁₇Br₂之间的协同效应，增加Ti₃C₂的负载量可提高光捕获能力，肖特基异质结的形成可促进有效的电荷载流子分离，以及光热效应可促进表面反应动力学。此外，对影响TBOB复合材料光催化性能的关键因素进行了详细的研究。自由基捕获实验和电子顺磁共振（EPR）技术证实了·O₂^-和e^-是TC光催化降解的主要活性物种。结合实验分析和理论计算，提出并讨论了可能的电荷载流子转移途径和光催化降解机理。本研究为合理设计高效光热辅助Ti₃C₂基光催化剂提供了理论和实验依据。更多还原

【Abstract】 Photocatalytic technology is considered to be an efficient and green approach for removing tetracycline hydrochloride （TC） to meet the demands of sustainable development.Here,a facile stirring process was employed to construct Ti₃C₂/Bi₁₂O₁₇Br₂ （termed as TBOB） Schottky heterojunction with a hierarchical structure,in which the Bi₁₂O₁₇Br₂ component was closely deposited on the surface of Ti₃C₂.The TC photodegradation performance was estimated for all catalysts under simulated solar light.Compared with Bi₁₂O₁₇Br₂,TBOB materials exhibited thesuperior photodegradation activity due to the synergistic effect between Ti₃C₂ and Bi₁₂O₁₇Br₂,which could increase light harvesting capacity derived from Ti₃C₂ loading,promote the charge carrier separation due to the formed Schottky heterojunction,and facilitate surface reaction kinetics owing to the photothermal effect.Besides,some crucial influencing factors on the photocatalytic performance over TBOB composites were separately studied in detail.The free radical capture experiment and electron paramagnetic resonance （EPR） technique confirmed the predominant active species of·O₂^-and e^-for the TC photodegradation.Combined with experimental analysis and theoretical calculations,insight into the charge carrier transfer and photodegradation mechanisms were proposed.This study provides theoretical and experimental insights for the rational design of high-efficiency photothermal-assisted Ti₃C₂-based photocatalysts.更多还原