Activated carbon fibers loaded with MnO2 for removing NO at room temperature

• We prepared MnO2-loaded activated carbon fibers by co-precipitation method.
• MnO2 loading can remarkably promote ACF’s catalytic oxidation efficiency for NO.
• The NO removal efficiency of MnO2/ACF composite depends on the MnO2 loaded amount.

MnO2 loaded on activated carbon fibers (MnO2@ACF) were successfully prepared using co-precipitation methods, the as-prepared MnO2@ACF were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), temperature-programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS) and N2 adsorption/desorption analysis. The results showed that MnO2 particles were highly dispersed with a strong interaction between MnO2 particles and ACFs. MnO2 loaded on ACF can promote the catalytic oxidation efficiency of NO into NO2 remarkably, the loaded amount of MnO2 has an obvious effect on the NO oxidation efficiency over MnO2@ACF. The optimal amount of MnO2 for MnO2@ACF is 3.64 wt.%, and the oxidation efficiency of NO was increased from 20.1% over A15 to 30.6% over MnO2@ACF.