纳米片聚结Co3O4微球催化甲苯燃烧

催化学报 , 2014, (9): 1475-1481. doi: 10.1016/S1872-2067(14)60072-3

纳米片聚结Co3O4微球催化甲苯燃烧

王芳 ^1, , 戴洪兴 ^2, , 邓积光 ^3, , 谢少华 ^4, , 杨黄根 ^5, , 韩文 ^6,

1.北京工业大学环境与能源工程学院北京市区域大气污染控制重点实验室和化学化工系,北京,100124

2.北京工业大学环境与能源工程学院北京市区域大气污染控制重点实验室和化学化工系,北京,100124

3.北京工业大学环境与能源工程学院北京市区域大气污染控制重点实验室和化学化工系,北京,100124

4.北京工业大学环境与能源工程学院北京市区域大气污染控制重点实验室和化学化工系,北京,100124

5.北京工业大学环境与能源工程学院北京市区域大气污染控制重点实验室和化学化工系,北京,100124

6.北京工业大学环境与能源工程学院北京市区域大气污染控制重点实验室和化学化工系,北京,100124

基金项目: 北京市属高等学校创新团队建设提升计划项目 2013教育教学-研究生教育-2011年北京市优秀博士学位论文指导教师项目(20111000501) 国家自然科学基金(21377008) 2013教育教学-研究生培养-全国优博导师及培育基地建设项目(005000542513551)

关键词：氧化钴微球 , 纳米片形貌 , 表面活性剂辅助水热合成 , 甲苯燃烧

Nanoplate-aggregate Co3O4 microspheres for toluene combustion

Keywords： Cobalt oxide microsphere , Nanoplate morphology , Surfactant-assisted hydrothermal synthesis , Toluene combustion

采用乙二胺辅助的水热法制备了纳米片聚结的Co3O4微球.利用多种分析技术表征了其物化性质，并评价了其对甲苯燃烧的催化活性.结果表明，由添加1.0 ml乙二胺经140°C水热处理12 h后制得的Co3O4样品呈纳米片聚结的微球状表面形貌. Co3O4微球样品的比表面积约为66 m2 g-1.与体相Co3O4样品相比， Co3O4微球样品具有较高的氧吸附物种浓度和较好的低温还原性.当空速为20000 ml g-1 h-1时，在Co3O4微球样品上甲苯转化率达到50%和90%时的反应温度分别为230和254°C.这与该样品具有较大的比表面积、较高的氧吸附物种浓度和较好的低温还原性相关.

Nanoplate-aggregate microspherical Co3O4 was prepared by an ethylenediamine-assisted hydro-thermal route and characterized by means of numerous techniques. Their catalytic activities for toluene combustion were evaluated. The Co3O4 sample obtained using 1.0 ml of ethylenediamine and a hydrothermal treatment at 140 °C for 12 h had a nanoplate-aggregate microspherical mor-phology. This microspherical Co3O4 sample with a surface area of 66 m2 g-1 had a higher adsorbed oxygen concentration and better low-temperature reducibility than bulk Co3O4. Over the Co3O4 microsphere sample, the temperatures required for 50%and 90%toluene conversions were 230 and 254 °C, respectively, at a space velocity of 20000 ml g-1 h-1. The good catalytic performance of the Co3O4 microsphere sample was related to its large surface area, high oxygen adspecies concen-tration, and good low-temperature reducibility.

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