采用水热法制备出不同比的Co0.5Zn0.5Fe2O4/C复合物,通过X射线衍射分析仪（XRD）、扫描电镜（SEM）、能谱仪（EDS）、振动样品磁强计（VSM）、网络分析仪对该复合物的形貌、电磁性能进行表征与分析。结果表明：Co0.5Zn0.5Fe2O4被碳包裹...采用水热法制备出不同比的Co0.5Zn0.5Fe2O4/C复合物,通过X射线衍射分析仪（XRD）、扫描电镜（SEM）、能谱仪（EDS）、振动样品磁强计（VSM）、网络分析仪对该复合物的形貌、电磁性能进行表征与分析。结果表明：Co0.5Zn0.5Fe2O4被碳包裹程度随碳相对含量的增加而增加;在频率为3-18 GHz范围内,Co0.5Zn0.5Fe2O4/C复合物的介电常数虚部和介电损耗随Co0.5Zn0.5Fe2O4的相对含量增加而增加;与Co0.5Zn0.5Fe2O4相比,Co0.5Zn0.5Fe2O4/C复合物的最大吸收峰有明显提高,且当0.5 g Co0.5Zn0.5Fe2O4与2 g葡萄糖混合时,制备的样品最大吸收峰在频率16 GHz左右可达到7 d B。展开更多
Ba\-\{0.5\}Sr\-\{0.5\}Co\-\{0.8\}Fe\-\{0.2\}O\-\{3-\%δ\%\} and Ba\-\{0.5\}Sr\-\{0.5\}Co\-\{0.8\}Ti\-\{0.2\}O\-\{3-\%δ\%\} oxides were synthesized by a combined EDTA\|citrate complexing method. The catalytic behavior...Ba\-\{0.5\}Sr\-\{0.5\}Co\-\{0.8\}Fe\-\{0.2\}O\-\{3-\%δ\%\} and Ba\-\{0.5\}Sr\-\{0.5\}Co\-\{0.8\}Ti\-\{0.2\}O\-\{3-\%δ\%\} oxides were synthesized by a combined EDTA\|citrate complexing method. The catalytic behavior of these two oxides with the perovskite structure was studied during the reaction of methane oxidation. The pre\|treatment with methane has different effect on the catalytic activities of both the oxides. The methane pre\|treatment has not resulted in the change of the catalytic activity of BSCFO owing to its excellent reversibility of the perovskite structure resulting from the excellent synergistic interaction between Co and Fe in the oxide. However, the substitution with Ti on Fe\|site in the lattice makes the methane pre\|treatment have an obvious influence on the activity of the formed BSCTO oxide.展开更多
文摘采用水热法制备出不同比的Co0.5Zn0.5Fe2O4/C复合物,通过X射线衍射分析仪（XRD）、扫描电镜（SEM）、能谱仪（EDS）、振动样品磁强计（VSM）、网络分析仪对该复合物的形貌、电磁性能进行表征与分析。结果表明：Co0.5Zn0.5Fe2O4被碳包裹程度随碳相对含量的增加而增加;在频率为3-18 GHz范围内,Co0.5Zn0.5Fe2O4/C复合物的介电常数虚部和介电损耗随Co0.5Zn0.5Fe2O4的相对含量增加而增加;与Co0.5Zn0.5Fe2O4相比,Co0.5Zn0.5Fe2O4/C复合物的最大吸收峰有明显提高,且当0.5 g Co0.5Zn0.5Fe2O4与2 g葡萄糖混合时,制备的样品最大吸收峰在频率16 GHz左右可达到7 d B。
文摘Ba\-\{0.5\}Sr\-\{0.5\}Co\-\{0.8\}Fe\-\{0.2\}O\-\{3-\%δ\%\} and Ba\-\{0.5\}Sr\-\{0.5\}Co\-\{0.8\}Ti\-\{0.2\}O\-\{3-\%δ\%\} oxides were synthesized by a combined EDTA\|citrate complexing method. The catalytic behavior of these two oxides with the perovskite structure was studied during the reaction of methane oxidation. The pre\|treatment with methane has different effect on the catalytic activities of both the oxides. The methane pre\|treatment has not resulted in the change of the catalytic activity of BSCFO owing to its excellent reversibility of the perovskite structure resulting from the excellent synergistic interaction between Co and Fe in the oxide. However, the substitution with Ti on Fe\|site in the lattice makes the methane pre\|treatment have an obvious influence on the activity of the formed BSCTO oxide.
