Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1, Kasugakoen, Kasuga, Fukuoka 816-8580, Japan.
Department of Advanced Materials Science and Engineering, Faculty of Engineering Sciences, Kyushu University, 6-1, Kasugakoen, Kasuga, Fukuoka 816-8580, Japan.
Dalton Trans. 2023 Jul 18;52(28):9525-9540. doi: 10.1039/d3dt01360j.
Phenol is an important intermediate for manufacturing chemical products in industry. In recent decades, phenol synthesis by one-pot oxidation of benzene has aroused tremendous interest in phenol synthesis due to the enormous energy consumption of the three-step cumene method in the industry. Photocatalysis is promising for the selective conversion of benzene to phenol because it can proceed under mild reaction conditions. However, overoxidation of phenol by photocatalysts with high oxidation ability decreases the yield and selectivity, which is the major limiting factor. Thus, increasing the phenol formation efficiency plays a crucial role in photocatalytic systems for benzene oxidation. In this context, selective photocatalytic benzene oxidation over several types of photocatalytic systems has been developed rapidly in the past few years. In this perspective, current homogeneous and heterogeneous photocatalytic systems for this reaction have been reviewed systematically first. Then, an overview of some strategies from the last decade for increasing phenol selectivity has been provided. In the end, a summary and outlook on the challenges and future directions in the research field are included in this perspective, which would be of great interest for further improving the selectivity of the photocatalytic benzene oxidation reaction.
苯酚是工业中制造化学产品的重要中间体。近几十年来，由于工业中三步异丙苯法的巨大能耗，一锅氧化苯合成苯酚引起了人们极大的兴趣。由于光催化可以在温和的反应条件下进行，因此对于苯到苯酚的选择性转化具有广阔的前景。然而，具有高氧化能力的光催化剂会导致苯酚过度氧化，从而降低产率和选择性，这是主要的限制因素。因此，提高苯酚的形成效率在苯氧化的光催化体系中起着至关重要的作用。在这种情况下，近年来人们迅速开发了多种类型的光催化体系，用于选择性光催化氧化苯。在本综述中，首先系统地综述了目前用于该反应的均相和多相光催化体系。然后，综述了过去十年中提高苯酚选择性的一些策略。最后，对该研究领域的挑战和未来方向进行了总结和展望，这将对进一步提高光催化氧化苯反应的选择性具有重要意义。
