摘要
利用中性伯胺 (十二胺 )作模板剂 ,合成了过渡金属Cu、 Ti、 Co、或Fe取代的HMS中孔材料 .XRD和FT IR表征表明 ,Cu和Ti能有效地嵌入HMS骨架壁中而不会造成其中孔有序度的下降 ;而Co和Fe的嵌入会明显降低表面活性剂的模板组装作用 ,从而造成中孔结晶有序度的显著下降 .催化实验结果表明 :Cu HMS和Fe Silica是苯酚羟基化的有效催化剂 ,而Ti
Transition metals copper, titanium, cobalt and iron substituted hexagonal mesoporous silicas(CuHMS, TiHMS, CoHMS and FeSilica) were synthesized by using neutral dodecylamine(DDA) as templating agent. XRD and FTIR measurements indicate that the incorporations of Cu and Ti cause no deterioration of the quality of the 100 reflection of mesoporous materials, while the introduction of Co, and especially Fe obviously decrease the assembled effects of templating agent, and deteriorate the quality of the 100 reflection of mesoporous materials seriously. The catalytic tests indicate that CuHMS and FeSilica are very effective catalysts for the hydroxylation of phenol with 30% H 2O 2 in aqueous solution; and TiHMS is an effective catalyst for the epoxidation of styrene with TBHP.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2000年第5期410-415,共6页
Acta Physico-Chimica Sinica
基金
国家自然科学基金资助项目!(29773013)
关键词
杂原子HMS
中孔催化材料
合成
催化性能
Heteroatoms substituted HMS, Catalytic oxidation,Phenol hydroxylation,Styrene epoxidation
