摘要
以介孔分子筛SBA-15为载体,采用等体积浸渍法分别制备了不同V负载量(4%～15%(质量分数))的V2O5/SBA-15及经过铈掺杂后的V2O5-CeO2/SBA-15催化剂,考察了催化剂对氯苯的催化燃烧性能,用XRD,UV-vis,SEM和TEM对催化剂进行了表征。活性评价结果表明,当V质量分数在10%时的V2O5/SBA-15催化剂对氯苯催化燃烧性能最好,在掺杂10%的稀土Ce后,催化燃烧氯苯的活性得到明显提高。表征结果表明,V2O5和CeO2均分散在SBA-15的孔道骨架上,没有破坏SBA-15的中孔结构。
The catalytic oxidation of chlorobenzene was investigated on V2O5/SBA-15 and V2O5-CeO2/SBA-15 catalysts.These catalysts were characterized by XRD,SEM,TEM and UV-vis spectroscopy.The pure ordered hexagonal mesoporous silica SBA-15 was used as a support for preparing dispersed vanadium and cerium containing catalysts.The V2O5/SBA-15 samples with different V loading（4%～15%） and cerium doped V2O5/SBA-15 catalyst were prepared by incipient wetness impregnation.The catalytic combustion of chlorobenzene was investigated on V2O5/SBA-15 and V2O5-CeO2/SBA-15 catalysts.The V2O5/SBA-15 catalysts containing 10% V showed the highest activity for the catalytic combustion of chlorobenzene.When 10% Ce was added into V（10%）/SBA-15 catalyst,the conversion of chlorobenzene was obviously increased.The characterization showed that V2O5 and CeO2 could enter SBA-15 framework.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2011年第4期428-432,共5页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金(21071113)
湖北省教育厅重大项目(Z20091502)
武汉市学科带头人计划(200951830551)资助
