摘要：

Nanosized Cu–Mn composite oxide catalysts were prepared from potassium permanganate, copper nitrate, n-butanol, and cetyltrimethylammonium bromide as a manganese source, copper source, reducing agent, and surfactant, respectively. The Cu 0. 2 –Mn sample possessed a small particle size (10–40 nm) and a relatively high specific surface area (4 6. 2 4 m 2 g 1 ); its main components were Cu 1. 5 Mn 1. 5 O4 and Mn3O4. As a consequence, the Cu 0. 2 –Mn catalyst exhibited good catalytic activity in the oxidation of toluene. At a toluene concentration of 1000 ppm and a space velocity of 6 0 , 0 0 0 mL g 1 h 1 , the T 5 0 and T 9 0 of the Cu 0. 2 –Mn catalyst toward toluene were 239 C and 250 C, respectively. Furthermore, even after 30 h of operation at 275 C, the conversion of toluene was 99% (at the space velocity of 6 0 , 0 0 0 mL g 1 h 1 ). An efficient method to fabricate nanosized copper manganese composite catalysts had been developed utilizing CTAB as soft templates. Moreover, characterizations of the Cu0.2-Mn catalysts had demonstrated that Cu0.2-Mn catalysts possessed a relatively high specific surface area, numerous nanoparticles of crystalline Mn3O4 and Cu1.5Mn1.5O4, high concentrations of surface lattice oxygen and a good reduction capacity. Such unique features had enhanced significantly the catalytic performance and catalytic stability of Cu0.2-Mn for toluene oxidation.

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