铁络合物/八面沸石催化剂中沸石主体的纳米效应  

Nano-Effect of Zeolite Host in Faujasite Zeolite-Encapsulated Iron Phenanthroline Complex Catalyst

作　　者：杨槐馨[1] 马静红[1] 李瑞丰[1] 杜君[1] 谢克昌[1] 

机构地区：[1]太原理工大学精细化工研究所一碳化学与化工国家重点实验室,山西太原030024

出　　处：《催化学报》2002年第1期51-55,共5页

基　　金：国家自然科学基金 ( 2 99730 2 8);国家重点基础研究发展规划 (G2 0 0 0 0 80 0 9)资助项目

摘　　要：采用自由配体法制备了Fephen/nano X和Fephen/nano Y两种不同粒度的Fephen/八面沸石纳米复合材料 (简称为Fephen/FAU) ,并采用X射线衍射、傅里叶变换红外光谱、漫反射紫外 可见光谱、热重 差热分析和催化反应等手段对其进行了表征 .研究结果发现 ,采用纳米沸石作主体是自由配体法制备金属络合物 /分子筛复合材料中提高络合物负载量的有效方法 .催化反应结果表明 ,与普通粒度的Fephen/Y复合材料相比 ,两种不同粒度的Fephen/nano X和Fephen/nano Y纳米复合材料对环己烷氧化反应的催化活性有很大的提高 .由于两种纳米沸石主体的差异 ,两种纳米复合材料的催化性能也明显不同 ,不仅对环己烷的转化能力不同 。Two kinds of faujasite zeolite-encapsulated Fe-phenanthroline complex nano-materials with different particle sizes, Fephen/nano-X and Fephen/nano-Y, were prepared by the flexible ligand method and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, diffuse reflectance ultraviolet-visible spectroscopy, thermogravimetry-differential thermal analysis, and catalytic reaction of the cyclohexane oxidation. It was shown that using nano-zeolites as the hosts of 'ship-in-bottle' materials is an efficient way to increase the contents of the Fephen complex in the zeolite matrix. The different hosts make the location of the Fephen complex in zeolite Y and the interaction between the host and guest different. Under the mild conditions (60degreesC, atmospheric pressure), using aqueous H2O2(30%) as the oxidant, with a similar Fe content, Fephen complexes in nano-Y exhibit the catalytic activity 2.5 times higher than that in normal Y for the oxidation of cyclohexane. This is due to the bigger surface area, shorter diffusion pathway, and higher complexing degree.

关 键 词：八面沸石 粒度 铁 邻菲咯啉 络合物 环己烷 氧化反应 纳米效应 负载型催化剂 催化性能 

分 类 号：O643.3[理学—物理化学]