Environmental Science and Pollution Research

, Volume 26, Issue 8, pp 8237–8247 | Cite as

Removal of benzene by non-thermal plasma catalysis over manganese oxides through a facile synthesis method

  • Hao Guo
  • Xin Liu
  • Hajime Hojo
  • Xin Yao
  • Hisahiro EinagaEmail author
  • Wenfeng ShangguanEmail author
Research Article


Three manganese oxide catalysts (MnOx) were synthesized via a simple method, and then they were introduced into the non-thermal plasma (NTP) system for benzene removal. The XRD and EXAFS results showed the MnOx were mainly in the Mn3O4 phase, and from the analysis of N2 adsorption/desorption isotherms, we knew the MnOx calcined at 250 °C (Mn250) had the largest surface area of 274.5 m2 g−1. Besides, Mn250 also exerted higher benzene adsorption capacity (0.430 mmol g−1) according to C6H6-TPD. O2-TPD indicated that Mn250 showed better oxygen mobility than Mn300. Moreover, by analyzing XPS results, it revealed that Mn250 exhibited rich abundant of surface adsorbed oxygen species (Oads) and moderate ratio of Mn4+/Mn3+, and the reducibility temperature was also the lowest among all the MnOx catalysts drawn by H2-TPR profiles. As a result, Mn250 combined with NTP could remove 96.9% of benzene at a low input power of 3 W (benzene concentration 200 ppm, and GHSV 60,000 mL gcat.−1 h−1), performing the best catalytic activity among the three catalysts and plasma only. Furthermore, the “NTP + Mn250” system also produced the highest CO2 concentration and lowest CO concentration in downstream, and the residual O3 after catalytic reaction was also the lowest, that is to say, the synergistic effect between NTP and Mn250 was more effective than other catalysts in benzene removal.

Graphical abstract


Benzene Non-thermal plasma Manganese oxides Facile synthesis method 



The authors would like to thank Hamada Shoma-san in Einaga-Hojo-lab for adjusting the non-thermal plasma system in this experiment. This work was financially supported by the National Key Research & Development Plan (2017YFC0211804).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Research Center for Combustion and Environmental TechnologyShanghai Jiao Tong UniversityShanghaiPeople’s Republic of China
  2. 2.Department of Energy and Material Sciences, Faculty of Engineering SciencesKyushu UniversityKasugaJapan

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