Abstract
The development of high-performance filters for hazardous particle matters (PMs) removal is crucial for indoor air quality control. Herein, by utilizing natural polysaccharide as substrate, manganese dioxide (MnO 2 ) particles were integrated into bacterial cellulose (BC) matrix through a facile way. MnO 2 crystals could interact with the surface hydroxyl groups of cellulose chains, thus endowing the MnO 2 @BC (MC) composites with a superior interface compatibility. Especially, the morphology and porosity of the MC composites can be finely regulated by varying the MnO 2 content. Such composites were utilized as filters for the removal of PM. The filtration efficiencies for PM 2.5 and PM 10 could reach 97.1% and 98.9%, respectively, and the gas permeability and pressure drop can be adjusted by optimizing MnO 2 loadings. The filtration mechanism is attributed to the inhibition effect of fibrous filter network, the hierarchically porous structure and electrostatic interactions. Such filter can be easily regenerated, and demonstrated a superior reusability.
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