摘要
用硝酸铁或草酸铁铵作铁源浸渍介孔分子筛MCM - 41,并在高温下焙烧 ,均得到α -Fe2 O3 /MCM - 41分子筛体系。经XRD相定量外推法测定 ,不同铁源 ,α -Fe2 O3 在MCM - 41上的最大分散量不同。当以硝酸铁为铁源时 ,α -Fe2 O3 最大分散量为 0 .5 8gα -Fe2 O3 /gMCM - 41;当以草酸铁铵为铁源时 ,α -Fe2 O3 最大分散量为 0 .2 5 gα -Fe2 O3 /gMCM - 41,明显低于以硝酸铁为铁源时的最大分散量。这与草酸铁铵高温分解产生的氨对介孔分子筛MCM— 41孔结构有较强的破坏作用有关。
The α-Fe2O3/MCM-41 samples ware prepared by impregnating MCM-41 mesoporous molecular sieve with Fe(NO3)3·9H2O or (NH4)3[Fe(C2O4)3]·3H2O solution and calcining at high temperature,the dispersion capacity of α-Fe2O3 on MCM-41 measured with XRD quantitative phase analysis is different,as the different raw material was used.when Fe(NO3)3·9H2O was used as raw material,the dispersion capacity is 0.58g α-Fe2O3/g MCM-41;When (NH4)3[Fe(C2O4)3]·3H2O was used as raw material,the dispersion capacity is 0.25g α-Fe2O3/g MCM-41.It is beacause that (NH4)3·[Fe(C2O4)3]·3H2O can be nesolved into NH3,which can destrog the hole constraction of MCM-41.
出处
《安阳师范学院学报》
2000年第2期23-25,54,共4页
Journal of Anyang Normal University
