摘要
采用浸渍-共沉淀法制备出ZrO2含量不同的负载型纳米TiO2/ZrO2-Al2O3复合载体,以此复合载体负载SO42-制备SO42-/TiO2/ZrO2-Al2O3催化剂。运用XRD、BET、NH3-TPD、原位红外等技术与方法对催化剂的晶相结构、比表面积、孔径分布、酸中心种类等进行表征,并以α-蒎烯异构化为探针反应考察了催化剂的活性。结果表明,适量ZrO2的存在有利于减小TiO2粒度、增加比表面积和催化剂表面酸中心数及酸中心的强度,提高催化剂的活性。
Impregnation-coprecipitation method is applied to prepare the supported nano-TiO2/ZrO2-Al2O3 composite supports with different ZrO2 contents.SO2-4/TiO2/ZrO2-Al2O3 catalysts are obtained by supporting SO2-4 onto the composite supports.Crystalline structures,surface area,pore diameter distribution and acid properties of the catalysts are characterized by XRD,BET,in-suit FTIR,and NH3-TPD.The α-pinene isomerization reaction is chosen to investigate the catalytic properties of the catalysts.The results indicate that with siutable ZrO2 doped,the grain size of TiO2 will decrease and the surface area of the catalysts increase.The existence of ZrO2 increases the acid site number and acid strength with catalysts activity increase.
出处
《桂林工学院学报》
北大核心
2010年第1期103-106,共4页
Journal of Guilin University of Technology
基金
广西科学基金资助项目(桂科自0728217)
广西研究生教育创新计划资助项目(20081018)
