摘要
采用水热法制备TiO2空心球,以TiO2空心球为载体,采用等体积浸渍法分别制备了不同V负载量（3%~10%）的V2O5/TiO2和稀土改性后的V2O5-CeO2/TiO2催化剂,利用XRD,SEM,EDS,TEM对TiO2空心球及V2O5-CeO2/TiO2催化剂进行了表征,结果表明,空心球TiO2分散性良好,粒径在1.5μm左右,且其为锐钛矿结构,负载的V和大部分的Ce均匀分散在TiO2空心球体内部或者表面而未破坏TiO2空心球结构。考察了催化剂对氯苯的催化燃烧性能,活性评价结果表明当V负载量在5%时,V2O5/TiO2催化剂对氯苯催化燃烧性能最佳,在掺杂10%的稀土Ce后,催化燃烧氯苯的活性得到明显提高。
The TiO2 hollow spheres were prepared by hydrothermal synthesis.The saturated wetness impregnation method was used in preparation of V2O5/TiO2 supported V with different loading（3% ~10%） and rare earth Ce in/on hollow TiO2 spheres.The catalysts were characterized by XRD,SEM,TEM and EDS spectroscope.The images showed that the TiO2 hollow spheres were successfully prepared with the diameter of 1.5 μm and they were typical anatase phase.The results showed that the vanadium and most of the cerium were well-dispersed in/on TiO2 hollow spheres without breaking the hollow structures.The catalytic combustion of chlorobenzene was investigated on V2O5/TiO2 and V2O5-CeO2/TiO2 catalysts.The V2O5/TiO2 catalysts containing 5 wt.% V showed the highest activity for the catalytic combustion of chlorobenzene.When 10 wt.% Ce was added into V（5%）/TiO2 catalyst,the conversion of chlorobenzene was increased obviously.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2011年第3期316-320,共5页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金(20873097)
湖北省教育厅重大项目(Z20091502)
武汉市学科带头人计划(200951830551)资助
