Li Chunyan, Wang Xiaozhuo, Wu Jianhao, Gao Jingyang, Zhao Rixu, Xia Sasa, Yang Hua, Chen Zhi, Li Lan, Wang Wen
College of Materials and Chemistry, China Jiliang University, 258 Xueyuan Street, Xiasha Higher Education Zone, Hangzhou 310018, China.
China Construction Ready Mixed Concrete Co., Ltd., Wuhan 430070, China.
Ultrason Sonochem. 2023 Oct;99:106584. doi: 10.1016/j.ultsonch.2023.106584. Epub 2023 Sep 4.
The photocatalytic technique has drawn far-ranging interests in addressing the current issues; however, its property suffers from the limited visible light response and rapid recombination of carriers. To address these issues, two specific approaches have been proposed to enhance the photocatalytic activity: (1) ultrasound-assisted synthesis has been utilized to prepare photocatalysts, resulting in refined grain size, increased specific surface area, and reduced photogenerated carrier recombination; (2) sonophotocatalysis and piezoelectric enhanced photocatalysis have been developed to accelerate the reaction, which utilizes the synergism between ultrasound and light. On one side, sonophotocatalysis generates cavitation bubbles which induce more reactive radicals for redox reactions. On the other side, ultrasound induces deformation of the piezoelectric material structure, which changes the internal piezoelectric potential and improves the photocatalytic performance. Currently, intensive efforts have been devoted to related research and great progress has been reached with applications in pollutant degradation, new energy production, and other fields. This work starts by elucidating the fundamental concept of ultrasound-assisted photocatalyst synthesis and photocatalysis. Then, the synergistic behavior between ultrasonic and light in ultrasonic-assisted photocatalysis has been thoroughly discussed, including pollutant degradation, water splitting, and bacterial sterilization. Finally, the challenge and outlook are investigated and proposed.
光催化技术在解决当前问题方面引起了广泛关注；然而，其性能受到可见光响应有限和载流子快速复合的困扰。为了解决这些问题，人们提出了两种具体方法来提高光催化活性：（1）利用超声辅助合成来制备光催化剂，从而得到细化的晶粒尺寸、增加的比表面积以及减少光生载流子复合；（2）开发了声光催化和压电增强光催化来加速反应，这利用了超声和光之间的协同作用。一方面，声光催化产生空化气泡，从而诱导更多的活性自由基用于氧化还原反应。另一方面，超声引起压电材料结构的变形，这改变了内部压电势并提高了光催化性能。目前，人们已在相关研究中投入了大量精力，并在污染物降解、新能源生产及其他领域的应用方面取得了巨大进展。这项工作首先阐明了超声辅助光催化剂合成和光催化的基本概念。然后，深入讨论了超声辅助光催化中超声与光之间的协同行为，包括污染物降解、水分解和细菌杀菌。最后，研究并提出了挑战与展望。
