摘要
以Ce(NO3)3·6H2O和NH3·H2O为原料,采用沉淀法制备Ce O2粉体,采用X射线衍射仪、扫描电子显微镜对催化剂的晶相结构和表面形貌进行表征。在微波加热作用下,以苯酚为模拟含酚废水对催化剂的催化性能进行了测定,并探讨了原料投加量、搅拌时间、微波加热时间等对苯酚去除率的影响。结果表明:所制备的Ce O2纳米材料为高度结晶的立方萤石型结构,平均粒径为36.5 nm。在微波辅助Ce O2/H2O2体系催化降解苯酚实验中,当苯酚初始浓度500 mg·L-1,投加纳米Ce O20.4 g,10%H2O20.6 m L,室温下搅拌60 min,微波反应器中以100℃反应40 min,苯酚的去除率达到87%以上。
Ce O2 powders were prepared by precipitation method,using Ce（ NO3）3·6H2O and NH3·H2O as raw materials. The crystal structure and surface shape of the catalyst was analyzed via X-ray diffraction（ XRD） andscanning electron microscopy（ SEM）. Moreover,under the microwave heating,the catalytic properties of the catalyst in the degradation of the phenol simulate wastewater were measured. The effects of raw materials dosage,stirring time and the microwave heating time on the removal rate of phenol were observed. The results showed that the prepared Ce O2 had cubic fluorite structure of highly crystalline,the average particle size was 36. 5 nm. In the experiment of phenol catalytic degradation by microwave assisted Ce O2/ H2O2 system,when the initial phenol concentration of 500 mg·L- 1,dosage of nano Ce O20. 4 g,10% H2O20. 6 m L,stirring 60 min at room temperature,reacting 40 min at 100 ℃ in microwave reactor,phenol removal rate reached over 87%.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2015年第4期418-423,共6页
Journal of the Chinese Society of Rare Earths
基金
"十二五"国家重大水专项子课题项目(2012ZX07202-002)资助
