纳米级介孔羟基磷酸铁负载金催化剂的制备及其催化苯乙烯环氧化性能的研究  

Nano-sized mesoporous sodium iron( Ⅲ) hydroxyphosphate supported gold catalyst: preparation and their catalytic performance over styrene epoxidation

作　　者：刘成[1] 王芳[2] 刘贵[1] 李文秀[1] 刘俊华[1,3] 

机构地区：[1]南京师范大学化学与材料科学学院,江苏南京210023 [2]南京工业大学理学院,江苏南京210027 [3]南京师范大学江苏生物医药功能材料协同创新中心,江苏南京210023

出　　处：《现代化工》2016年第10期87-91,共5页Modern Chemical Industry

基　　金：国家自然科学基金青年基金(21303085);江苏省自然科学基金(BK20130901;BK20130930)

摘　　要：采用反相微乳液-溶剂热合成法合成了介孔羟基磷酸铁(sodium iron(Ⅲ)hydroxyphosphate,SIHP),进而以沉积-沉淀法制备Au-SIHP催化剂,实现纳米金的均匀分散,并对苯乙烯环氧化表现出优异的催化性能。通过X射线粉末衍射、扫描电镜、透射电镜、红外光谱、N_2吸附-脱附以及X射线光电子能谱等对其进行表征,探究其优异催化性能的根源,并对苯乙烯环氧化的工艺条件进行了优化。Mesoporous sodium iron（ Ⅲ） hydroxyphosphate（ SIHP,Na_（4. 55）Fe（ PO_4）_2H_（0. 45） O,pore size of 3. 8 nm）is prepared by reverse microemulsionsolvothermal method. A series of Au-iron hydroxyphosphate（ Au-SIHP） catalysts are further prepared by precipitationimpregnation method. The high dispersion of gold nanoparticles is achieved. The catalytic tests show that Au-SIHP has good catalytic activity and epoxidation selectivity for styrene. The catalysts are characterized by using X-ray diffraction（ XRD）,scanning electron microscope（ SEM）,tansmission electron microscope（ TEM）,Fourier transform infrared spectroscopy（ FT-IR）,N_2adsorption-desorption（ BET）,X-ray photoelectron spectroscopy（ XPS） and other instruments. The origin of its excellent catalytic performance is explored. The process conditions of styrene epoxidation are also optimized.

关 键 词：介孔 羟基磷酸铁 纳米金 苯乙烯 环氧化 

分 类 号：O643.3[理学—物理化学]