| 不同方法制备的CoxZr1-xO2催化剂及其氧化甲苯和甲醛的性能 |
| Preparation Methods of CoxZr1-xO2 Catalysts and Their Properties of Oxidizing Toluene and Formaldehyde |
|
| 摘要: 采用沉淀法、水热法、热分解法和浸渍法制备了CoxZr1-xO2催化剂。通过热重（TG）、X射线衍射（XRD）、扫描电子显微镜（SEM）、能量散射X射线光谱（EDS）、N2吸附/脱附测试等手段对催化剂的理化性质进行了表征。结果表明，水热法制备的催化剂CoxZr1-xO2-H（1∶1）中的钴、锆的分散性好、颗粒均匀、孔结构发达，比表面积可达到102 m2·g-1，氧化甲苯和甲醛的活性优于其他催化剂，其表观活化能为65.2和53.6 kJ·mol-1。CoxZr1-xO2-H（1∶1）的优异催化性能与物种的分散度及协同效应、比表面积和孔结构有关。控制Co-Zr催化剂的制备方法可以获得良好的物化性能。 |
| 关键词: 金属复合氧化物 多相催化 多孔材料 挥发性有机化合物氧化 合成方法 |
| 基金项目: 国家自然科学基金（No.21676028）和辽宁省自然科学基金（No.2019-ZD-0506）资助项目。 |
| Abstract: CoxZr1-xO2 catalysts were prepared by precipitation, hydrothermal, thermal decomposition and impregnation methods. The physicochemical properties of the catalysts were characterized by thermogravimetric (TG), X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), N2 adsorption/ desorption test. The results showed that the cobalt species and zirconium species on the catalysts prepared by hydrothermal method had good dispersion, uniform spherical particles, and large specific surface area up to 102 m2·g-1, and well-developed pore structure. The activity of oxidized toluene and formaldehyde on the catalyst CoxZr1-xO2-H (1 ∶1) prepared by hydrothermal method consisting of Co and Zr was better than that of other catalysts. The apparent activation energies were 65.2 and 53.6 kJ·mol-1. The excellent catalytic performance of CoxZr1-xO2-H (1∶1) was associated with the species dispersion, strong synergistic effect, surface area and pore structure. The well-controlled method for creation of Co-Zr catalysts with good physicochemical properties could be adopted for the generation of other catalytic materials with mixed metal oxides. |
| Keywords: heterometallic compound oxide heterogenous catalysis porous materials volatile organic compounds oxidation synthesis methods |
| 投稿时间：2020-04-30 修订日期：2020-10-14 |
| 摘要点击次数: 1866 |
| 全文下载次数: 1201 |
| 高子程,刘晶,任志博,孙晓,夏云生.不同方法制备的CoxZr1-xO2催化剂及其氧化甲苯和甲醛的性能[J].无机化学学报,2020,36(12):2340-2348. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
