武汉理工大学曹少文团队报道了层状Pt/NiO中空纳米纤维在室温下催化氧化HCHO。这一研究成果于2025年3月24日发表在国际顶尖学术期刊《结构化学》上。

甲醛（HCHO）是一种重要的室内空气污染物，对人类健康构成严重威胁，其清除成为一个关键问题。在各种消除HCHO的方法中，催化氧化已成为最有效和实用的方法之一。本研究采用半牺牲模板辅助水热煅烧工艺制备了层次化中空氧化镍纳米纤维（NiO-HNF）。然后通过浸渍-化学还原过程将铂（Pt）纳米颗粒加载到NiO-HNF上。Pt/NiO-HNF纳米复合材料在室温下具有明显的HCHO分解活性，这可归因于其独特的结构特征。纳米复合材料的分层结构提供了高比表面积和丰富的孔隙率，有利于Pt纳米粒子的均匀分散，并增加了可用于催化的活性位点的数量。为了进一步研究氧化机理，利用原位差分反射红外红外变换光谱（DRIFTS）技术。结果表明，氧化过程中的主要中间体是二氧亚甲基和甲酸酯。这项研究强调了中空过渡金属氧化物复合材料作为去除室内空气污染物的有效材料的潜力。

附：英文原文

Title: Hierarchical Pt/NiO hollow nanofibers for catalytic oxidation of HCHO at room temperature

Author: anonymous

Issue&Volume: 2025-03-24

Abstract: Formaldehyde (HCHO), a significant indoor air pollutant, poses serious health risks to humans, making its removal a critical issue. Among the various methods for HCHO elimination, catalytic oxidation has emerged as one of the most efficient and practical approaches. In this study, hierarchical hollow nickel oxide nanofibers (NiO-HNF) were developed by using a semi-sacrificial template-assisted hydrothermal and calcination process. Platinum (Pt) nanoparticles were then loaded onto the NiO-HNF through an impregnation-chemical reduction process. The Pt/NiO-HNF nanocomposite demonstrates a marked improvement in HCHO decomposition activity at room temperature, which can be ascribed to its distinct structural features. The hierarchical structure of the nanocomposite, which provides a high specific surface area and abundant porosity, facilitated the uniform dispersion of Pt nanoparticles and increased the number of active sites available for catalysis. To further investigate the oxidation mechanism, in-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) was utilized. The findings suggest that the main intermediates during the oxidation process were dioxymethylene and formate species. This study highlights the potential of hollow transition metal oxide composites as efficient materials for the removal of indoor air pollutants.

DOI: 10.1016/j.cjsc.2025.100575

Source: http://cjsc.ac.cn/cms/issues/781