【摘要】 以正硅酸乙酯(TEOS)为硅源,十六烷基三乙基溴化铵(CTEABr)为模板剂,在强酸性条件下采用溶胶-凝胶法合成了Cu掺杂SBA-1分子筛。用XRD、SEM、N2吸附/脱附、红外光谱对所制备的样品进行表征。XRD测定结果显示所合成的Cu/SBA-1具有明显的立方介孔结构,Cu/SBA-1比表面积达931 m2.g-1,粒径约为10-15μm,红外光谱显示掺杂金属进入到了分子筛骨架中。用于苯与过氧化氢催化羟化活性测试,Cu/SBA-1显示高催化活性,苯的转化率为48.5%,生成苯酚与二酚的选择性分别为47%和51%。更多还原

【Abstract】 The mesoporous molecular sieve SBA-1 doped with Cu was directly synthesized by the sol-gel method under strongly acidic conditions,using cetyltriethylammonium bromide(CTEABr) as template and TEOS as silica source.Samples were characterized by XRD,SEM,FT-IR and N2 adsorption/desorption techniques.The XRD pattern showed the synthesized mesoporous materials had a well order cubic structure.Incorporated Cu species existed in the Si-O framework,revealed by FT-IR.The Cu/SBA-1 had high specific surface area(931m2.g-1) with grain size of 10-15 μm.The catalytic activity of Cu/SBA-1 for hydroxylation of benzene with hydrogen peroxide was tested.Cu/SBA-1 exhibited keen catalytic performance and benzene conversion of 48.5% was obtained with selectivity of 47% to phenol and 51% diphenols respectively.更多还原