Journal
CATALYSIS TODAY
Volume 258, Issue -, Pages 595-601Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2015.03.044
Keywords
Surfactants; Manganese dioxide; 4-Nitrophenol; Catalytic ozonation
Funding
- National Natural Science Foundation of China [21207133]
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Two series of alpha-MnO2 materials were prepared via a similar method with surfactant cetyltrimethylammonium bromide (CTAB) and sodium dodecyl benzene sulfate (SDBS). The surfactants work both as shape directing agent and reduction initiator. The alpha-MnO2 synthesized with 0.2 M of CTAB showed a mesoporous structure with high surface area of 387.7 m(2)/g. It is very active in catalytic ozonation of 4-nitrophenol (4-NP) and total organic carbon removal, with higher catalytic stability than commercial MnO2. Using tert-butanol and p-benzoquinone as scavengers of different oxidative species, we found that superoxide radicals, rather than hydroxyl radicals, were mainly responsible for the degradation of 4-NP. (C) 2015 Elsevier B.V. All rights reserved.
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