Abstract
The catalytic activities of CeO2-MnOx composite oxides synthesized through oxalate method were researched. The results exhibited that the catalytic properties of CeO2-MnOx composite oxides were higher than pure CeO2 or MnOx. When the Ceat/Mnat ratio was 3:7, the catalytic activity reached the best. In addition, the activities of CeO2-MnOx synthesized through different routes over benzene oxidation were also comparative researched. The result indicated that the catalytic property of sample prepared by oxalate method was better than others, which maybe closely related with their meso-structures. Meanwhile, the effects of synergistic interaction and oxygen species in the samples on the catalytic ability can’t be ignored.
Highlights
Volatile organic compounds (VOCs) produced by industrial manufacturing are an important class of air pollutants
In order to compare the catalytic activity, Ce-Mn composite oxides were synthesized through carbonate method and hydrothermal method [19,21]
A series of CexMn1−x composite oxides, CeO2 and MnOx were synthesized through oxalate method and the complete catalytic oxidation of benzene were examined
Summary
Volatile organic compounds (VOCs) produced by industrial manufacturing are an important class of air pollutants. The selection of catalysts is important to catalytic degradation of benzene At present, both classes of catalysts i.e., noble metals and transition metal oxides, have been widely studied for the degradation of VOCs [6,7,8,9]. In our previous work [19], Mn element was doped or mixed with CeO2 to obtain Ce-Mn composites through hydrothermal method Their catalytic behaviours over benzene oxidation were researched, among which, all of Ce-Mn composites exhibited higher activity than MnOx and CeO2. We report a series of Ce-Mn composites synthesized through different routes Their catalytic activities over benzene oxidation are researched comparatively so as to acquire more active catalyst in the temperature range of 100 and 200 ◦C. Their microstructures are analyzed in detail so that understanding the elements influencing the activity of samples
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