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Efficient MnOx supported on coconut shell activated carbon for catalytic oxidation of indoor formaldehyde at room temperature
coconut shell activated carbon

MnOx was supported on peracetic acid modified coconut shell activated carbon (MnOx/AC) via facile in-situ redox reactions and used for catalytic oxidation of HCHO which is a major indoor air pollutant. The MnOx/AC catalysts were characterized by XRD, Raman, XPS, BET and in-situ DRIFTS technologies. The prepared MnOx was δ-type structure with poor crystalline. With the addition of methanol as a reducing agent during preparation, the MnOx/AC-methanol catalyst exhibited superior catalytic activity and stability toward HCHO oxidation at room temperature. The HCHO removal efficiency was kept nearly at 100% for a reaction time of 1000 min and remained highly stable even after six repetitive cycles. The rich Mn3+ and surface oxygen groups were beneficial for the catalytic activity. granular activated carbon supplierThe in-situ DRIFTS results showed lower accumulation and faster decomposition of intermediates on the surface of the MnOx/AC-methanol catalyst, which may account for its superior catalytic efficiency and stability.

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