Ultrathin δ-MnO2 nanoribbons for highly efficient removal of a human-related low threshold odorant- acetic acid

Efficient removal of human-emitted gaseous pollutants in indoor air may greatly reduce ventilation-related energy consumption, however few efforts have been made. Here we reported the room and low-temperature catalytic removal of a human-emitted odorant -acetic acid with odor threshold of 5.6 ppb. Ultrathin delta-MnO2 nanoribbons (delta-MnO2 UTNRs) with the thickness of 1-1.5 nm and aspect ratio of 200-600 was synthesized, which produced abundant active oxygen species such as hydroxyl radicals and superoxide at room temperature without light irradiation. Accordingly, as-prepared delta-MnO2 UTNRs could transform acetic acid into CO2 even at room temperature. The 100% one-through removal capacity for ~1 ppm acetic acid was about 20 mg/g, and it could be completely regenerated at 14 & nbsp;C-0. This study opens a new research direction and demonstrates that it is possible to catalytically remove human-emitted gaseous pollutant at low and even at room temperature.

Automated summary

Efficient removal of human-emitted gaseous pollutants in indoor air can reduce energy consumption. This study reported a catalytic method for the room and low-temperature removal of human-emitted acetic acid. Ultrathin delta-MnO2 nanoribbons were synthesized and could transform acetic acid into CO2 even at room temperature.