Communication—Hollow MnOx@Nanoparticles Electrospun Fibers with High Porosity for Formaldehyde Removal at Room Temperature

Abstract MnOx nanomaterials are regarded as promising catalysts for degrading formaldehyde (HCHO). However, the catalytic nanoparticles (NPs) suffer from the catalysis performance and stability loss due to their weak combination with the substrates and easy-aggregation nature. Herein, we develop a facile method to synthesize hollow porous MnOx@NPs fibers via electrospinning and two-step oxidation. The NPs, e.g., TiO2 and SnO2, can be efficiently loaded into MnOx fibers' inner frame through a simple dispersion process. The hollow porous structures obtained through two-step oxidation increase the HCHO removal efficiency by 8 times, while MnOx@SnO2 fibers exhibit the enhanced catalytic performance by 23.0% more.