摘要
以硅酸钠为硅源,十六烷基三甲基溴化铵为模板剂,硝酸铁为金属源,水热法直接合成Fe-MCM-41,再辅以助剂Co和Cr形成双金属掺杂的介孔材料,采用XRD、N2吸脱附、TG-DTA、FTIR、ICP对材料的结构和物化性质进行表征。以乙腈为溶剂,H2O2为氧化剂,考察所制备的材料对环己烷氧化的催化活性和选择性的影响。结果表明,与Fe-MCM-41的催化性能相比,FeCo-MCM-41会使环己烷的转化率下降,但环己醇的选择性增加;而FeCr-MCM-41会使环己烷的转化率和环己酮的收率增加。
Fe-MCM-41 sieve was synthesized by direct hydrothermal method using NaSiO3 and Fe（ NO3 ） as silicon and metal source, respectively, and CTAB as template. Bimetallic modified mesoporous materials doped with Co and Cr were prepared on the base of Fe-MCM-41. Structure and properties of the obtained materials were characterized by XRD, FTIR, ICP, TG-DTA and N2-adsorption/desorption. The effect of materials on catalytic activity and selectivity of cyclohexane oxidation was investigated with taking acetoni- trile and H2 02 as solvent and oxidant respectively. The results showed that the conversion of cyclohexane dropped but the selectivity of cyclohexanol rised with FeCo-MCM-41 as compared to catalytic activity of Fe-MCM-41. Meanwhile,the conversion of cyclohexane and yield of cyclohexanone increased with FeCr- MCM-41.
出处
《应用化工》
CAS
CSCD
2009年第10期1427-1430,共4页
Applied Chemical Industry
基金
台州学院校级学生科研项目(09XS23)
