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Photocatalytic Oxidation of Gaseous Toluene by Visible-Light-Driven CoCuMnO x : Performance and Mechanism

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Abstract

CoCuMnO x as one solar energy absorbing coating was synthesized by a facile co-precipitation approach for photocatalytic oxidation of gaseous toluene under visible light, and characterized by UV–Vis-DRS, BET, SEM, XRD and XPS, respectively. It demonstrated that CoCuMnO x owned photocatalytic activity and 57% of toluene with an initial concentration of 400 mg/m3 was degraded by 1 g CoCuMnO x under 6 h irradiation with a 100 W halogen tungsten lamp. The degradation of toluene was mainly attributed to photolysis and photocatalysis, and the thermal effect of CoCuMnO x had little effect. The degradation efficiency of toluene decreased gradually from 57 to 32% after five consecutive cycles. High active spinels like Cu1.5Mn1.5O4, CuMn2O4, CuCoO2 and Co2MnO4 existed onto the CoCuMnO x surface, which accelerated electron transfer so as to form various free radicals, such as h+, .OH, and ·O2 − etc. Toluene was oxidized evidently by these radicals so that the aromatic ring itself was cleaved to generate alcoholic, aldehydic and acidic intermediates.

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Acknowledgements

The work was financial supported by an innovative research team of Xi’an University of Architecture and Technology.

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Authors and Affiliations

  1. School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Yan Ta Road. No. 13, Xi’an, 710055, People’s Republic of China

    Longli Bo, Shuai Xie, Hailong Meng, Jiadong Liu & Bo Gao

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  1. Longli Bo
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  2. Shuai Xie
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  3. Hailong Meng
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  4. Jiadong Liu
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  5. Bo Gao
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Correspondence to Longli Bo.

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Bo, L., Xie, S., Meng, H. et al. Photocatalytic Oxidation of Gaseous Toluene by Visible-Light-Driven CoCuMnO x : Performance and Mechanism. Catal Lett 147, 1623–1630 (2017). https://doi.org/10.1007/s10562-017-2058-9

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  • DOI: https://doi.org/10.1007/s10562-017-2058-9

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