【摘要】 由于装饰材料的大量使用，甲醛（HCHO）成为主要的室内污染物，对环境和人体都有着巨大的危害，因此近年来HCHO的催化氧化引起了人们的极大关注。二氧化锰（MnO₂）因其多种价态、较强的催化性能和热稳定性，能有效地将HCHO降解为无害的CO₂和H₂O。综述了MnO₂的基础构成以及针对降解HCHO性能的关键结构和参数的研究进展，如晶体形态、暴露晶面、表面缺陷和与其他材料复合等。最后系统阐述了MnO₂氧化HCHO的反应机理并展望了MnO₂材料未来面临的挑战和研究方向，希望为综合环境应用中合理设计和制备高效MnO₂材料提供帮助。更多还原

【Abstract】 Due to the large number of decorative materials, formaldehyde（HCHO） has become the main indoor pollutant, which has great harm to the environment and human body, so the catalytic oxidation of HCHO has attracted great attention in recent years. Manganese dioxide（MnO₂） has been widely studied because of its multiple valence states, strong catalytic performance, thermal stability, and ability to effectively degrade HCHO into harmless CO₂ and H₂O. In this paper, the basic composition of MnO₂ and the research progress on key structures and parameters for degradation of HCHO, such as crystal morphology, exposed crystal face, surface defects, and composite with other materials, are reviewed. In addition, the reaction mechanism of MnO₂ oxidation HCHO was systematically elaborated. Finally, the future challenges and research directions of MnO₂ materials are prospected, and it is hoped that it will provide help for the rational design and preparation of efficient MnO₂ materials in comprehensive environmental applications.更多还原