Nanoplate-aggregate Co3O4 microspheres for toluene combustion

doi:10.1016/S1872-2067(14)60072-3

Chinese Journal of Catalysis ›› 2014, Vol. 35 ›› Issue (9): 1475-1481.DOI: 10.1016/S1872-2067(14)60072-3

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Nanoplate-aggregate Co₃O₄ microspheres for toluene combustion

Fang Wang, Hongxing Dai, Jiguang Deng, Shaohua Xie, Huanggen Yang, Wen Han

Key Laboratory of Beijing on Regional Air Pollution Control and Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

Received:2014-01-28 Revised:2014-03-03 Online:2014-08-19 Published:2014-08-22
Supported by:
This work was supported by the National Natural Science Foundation of China (21377008), 2013 Education and Teaching-Postgraduate Students Education-2011 Beijing Municipality Excellent Ph.D. Thesis Supervisor (20111000501), 2013 Education and Teaching-Postgraduate Students Cultivation-National Excellent Ph.D. Thesis Supervisor and Cultivation Base Construction (005000542513551), and the Foundation on the Creative Research Team Construction Promotion Project of Beijing Municipal Institutions.

Abstract

Abstract:

Nanoplate-aggregate microspherical Co₃O₄ was prepared by an ethylenediamine-assisted hydrothermal route and characterized by means of numerous techniques. Their catalytic activities for toluene combustion were evaluated. The Co₃O₄ sample obtained using 1.0 ml of ethylenediamine and a hydrothermal treatment at 140 ℃ for 12 h had a nanoplate-aggregate microspherical morphology. This microspherical Co₃O₄ sample with a surface area of 66 m² g^-1 had a higher adsorbed oxygen concentration and better low-temperature reducibility than bulk Co₃O₄. Over the Co₃O₄ microsphere sample, the temperatures required for 50% and 90% toluene conversions were 230 and 254 ℃, respectively, at a space velocity of 20000 ml g^-1 h^-1. The good catalytic performance of the Co₃O₄ microsphere sample was related to its large surface area, high oxygen adspecies concentration, and good low-temperature reducibility.

Key words: Cobalt oxide microsphere, Nanoplate morphology, Surfactant-assisted hydrothermal synthesis, Toluene combustion

Fang Wang, Hongxing Dai, Jiguang Deng, Shaohua Xie, Huanggen Yang, Wen Han. Nanoplate-aggregate Co₃O₄ microspheres for toluene combustion[J]. Chinese Journal of Catalysis, 2014, 35(9): 1475-1481.

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Nanoplate-aggregate Co₃O₄ microspheres for toluene combustion

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