One-pot hydrothermal preparation and catalytic performance of porous strontium ferrite hollow spheres for the combustion of toluene

作者：Ji, Kemeng; Dai, Hongxing^*; Deng, Jiguang; Zhang, Lei; Jiang, Haiyan; Xie, Shaohua; Han, Wen

来源：Journal of Molecular Catalysis A: Chemical , 2013, 370: 189-196.

DOI：10.1016/j.molcata.2013.01.013

• Hydrothermal fabrication
• Hollow spheres
• Perovskite-type oxide
• Strontium ferrite
• Toluene combustion

Strontium ferrite (SFO) hollow spheres with or without porous shells were fabricated via a novel one-pot hydrothermal route with the assistance of glucose and/or ethylenediamine. Physicochemical properties of the materials were characterized by means of a number of analytical techniques, and their catalytic performance was evaluated for the combustion of toluene. It is shown that the SFO samples possessed an orthorhombic structure and displayed a porous hollow spherical morphology with a surface area of 18-27 m(2)/g. The SFO sample (SFO-3) derived hydrothermally at 170 degrees C with a glucose/ethylenediamine volumetric ratio of 0.3/1.0 exhibited the highest surface area and oxygen adspecies concentration and the best low-temperature reducibility. Among the SFO samples, the SFO-3 sample showed the best catalytic activity for toluene combustion, and the T-10%, T-50%, and T-90% were ca. 145, 255, and 298 degrees C at a space velocity of 20,000 mL/(g h), respectively. It is concluded that the good catalytic performance of SFO-3 was associated with its surface oxygen species concentration and better low-temperature reducibility.

• 出版日期2013-4
• 单位北京工业大学