芳香醛是一类重要的精细化工中间体,常被用于药物、香料等的合成。传统的生产工艺采用氧化法或氯化水解法,其缺点是能耗高,环境污染严重。光催化氧化作为一种绿色的合成技术日益受到人们的关注,传统的半导体材料在光催化氧化芳香醇制芳香醛的反应中选择性差,可见光利用率低。因此,发展新型可见光催化材料是实现光催化氧化技术应用的核心。近几年来,金属有机骨架材料(Metal-organic Frameworks,MOFs)的蓬勃发展为研发具有高选择性催化氧化活性的新型光催化材料带来了新的希望。文章重点阐述了不同光催化材料在选择性氧化芳香醇制芳香醛中的研究现状及存在的问题,并对其发展趋势作了展望。
Aromatic aldehydes are important fine chemical intermediate, which have been commonly used in the synthesis of drugs, spices and so on. These aromatic aldehydes in the industrial manufacture are traditionally produced by an oxidation or chtorization-hydrolysis method, eventually leading to a high input and serious environment pollution. As a kind of green synthesis methods, photocatalytic oxidation technologies have gained increasing concern. However, semiconductor photocatalysts have shown the less utilization of visible light and a poor selectivity in the oxidation of aromatic alcohols to the corresponding aldehydes. Therefore, the development of new photocatalytic materials is considered as a key step for the application of the photocatalytic oxidation technologies. The flouring development of metal-organic frameworks (MOFs) in terms of research and application in recent years brings new hope for research and development in photocatalysts with high selectivities and activities. This paper was focused on the research process of the selective oxidation for aromatic alcohols to aldehydes over various photocatalysts in recent years. Meanwhile, the developing trends of this method were also prospected.