Partic. vol. 14 pp. 71-75 (June 2014)
doi: 10.1016/j.partic.2013.06.010

Short communication

Large-scale synthesis of hierarchical MnO₂ for benzene catalytic oxidation

Dongyan Li^a,b, Genli Shen^a,b, Wenxiang Tang^a,b, Haidi Liu^a, Yunfa Chen^a,*

yfchen@mail.ipe.ac.cn

Abstract

Hierarchical sea-urchin-shaped manganese oxide microspheres were synthesized via a facile method based on the reaction between KMnO₄ and MnSO₄ in HNO₃ solution at 50 °C. The average diameter of the microspheres is ∼850 nm. The microspheres consist of a core of diameter of ∼800 nm and nanorods of width ∼50 nm. The nanorods exist at the edge of the core. The Brunauer–Emmett–Teller surface area of the sea-urchin-shaped microspheres is 259.4 m²/g. A possible formation mechanism of the hierarchical sea-urchin-shaped microspheres is proposed. The temperature for 90% conversion of benzene (T_90%) on the hierarchical urchin-shaped MnO₂ microspheres is about 218 °C.

Graphical abstract

Keywords

Manganese oxide; Hierarchical; Catalyst; Benzene