Exploration of the synergistic effect in catalysis upon simultaneous utilization of two sources of power, ultrasound and light, is barely explored and remains a challenging issue. A crucial reason behind this is the difficulty in designing and constructing a well-defined sonophotoreactor capable of taking advantage of the benefits of combining sonochemistry and photochemistry. Herein, we present our successful reactor and a detailed study regarding how the utilization of ultrasonication can act as a process intensification tool for selective and partial photooxidation of a biomass derived model compound, benzyl alcohol. The main outcome was the enhanced selectivity in the case of sonophotocatalysis compared to photocatalysis. This selectivity was ascribed to the effects derived from the cavitation phenomena, leading to phenomena such as hot spot formation and jetting. Our study can act as guidance towards understanding the unique effects of ultrasound irradiation as a hybrid process intensification method (HPIM) towards application in more complex chemical reactions and manipulation of the nanocatalysts’ photoreactivity in catalytic valorization applications.

中文翻译：

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当声化学遇到异质光催化时：设计声光反应器以实现可持续的选择性氧化

同时探索利用超声和光两种能量同时催化的协同作用，这仍然是一个具有挑战性的问题。其背后的关键原因是难以设计和构建能够利用声化学和光化学相结合的优点的定义良好的声光反应器。在这里，我们介绍了我们成功的反应器，以及有关如何利用超声作用作为生物质衍生的模型化合物苯甲醇的选择性和部分光氧化的过程强化工具的详细研究。主要结果是与光催化相比，声光催化的选择性提高。这种选择性归因于空化现象产生的影响，导致形成热点和喷射等现象。我们的研究可以作为了解超声辐射作为一种混合过程强化方法（HPIM）的独特作用的指导，该方法适用于更复杂的化学反应以及在催化增值应用中处理纳米催化剂的光反应性。