The development of an effective adsorbent for volatile organic compounds has been pursued in recent years, and diverse porous materials have been identified as promising candidates. However, most of the porous adsorbents have a limitation: the removal efficiency decreases at high temperatures. In this study, electrospun double-layer polymethyl methacrylate/manganese acetate (core), polyacrylonitrile (shell)-based nanofibers (NFs) are carbonized and CO2-activated to produce Mn3O4 nanoparticles embedded in hollow activated carbon NFs (Mn3O4/HACNFs). Owing to their hollow structure, the Mn3O4/HACNFs exhibit a great ability to adsorb toluene, with a longer breakthrough time of toluene adsorption than conventional activated carbon NFs. At 280 °C, the Mn3O4/HACNFs achieve catalytic oxidation of toluene (conversion to CO2 = 99% ± 0.5). Furthermore, when tested under alternating-temperature conditions (260 and 280 °C) for 4 h, the Mn3O4/HACNFs exhibit no degradation of the catalytic activity.
Bibliographical noteFunding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and future Planning (NRF-2018R1A2A1A05020683).
© 2019 Elsevier B.V.
All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering