课程建设是是高职院校培养人才重要途径之一,教育不断改革和创新,对高职课程教学水平提出更高的要求,不仅需要学生掌握较强专业方面知识,也需要学生具备较高职业素养.因此,教师应不断创新以及完善教学模式,并合理构建高职课程,从而让学生具备较强综合素养.本文对高职课程建设展开讨论,并以化妆品艺术专业为例,旨在有效推进课程建设进程,满足当前市场需求,从根本上提升高职课程教学水平以及实用性.
Polydopamine-modified MCM-41 was prepared by sodium periodate-induced polymerization. Ru-La supported on MCM-41 and polydopamine-modified MCM-41 catalysts were prepared by double solvent impregnation method and tested for benzene hydrogenation to cyclohexene. Polydopamine-modified MCM-41 supported Ru-La catalyst exhibits much higher hydrophilicity and more moderate catalytic activity than unmodified MCM-41 supported Ru-La catalyst. The higher hydrophilicity, more moderate catalytic activity, and long-range order of mesoporous structure are beneficial for improving cyclohexene selectivity on account of the promotion of the desorption and the inhibition of the adsorption of cyclohexene. 47.0% of cyclohexene yield was obtained over Ru-La supported on polydopamine-modified MCM-41 in benzene hydrogenation.
Hydrophilic polyethylene glycol (PEG) modified MCM-41 and supported ruthenium catalyst were prepared, characterized and tested for benzene hydrogenation to cyclohexene. Ruthenium supported on PEG modified MCM-41 exhibits much better catalytic property than the unmodified catalyst. A cyclohexene yield of 55.4% was obtained at 68.5% of benzene conversion over ruthenium supported on MCM-41 modified with 5 wt% of PEG (by weight of MCM-41). It has been found that the introduction of PEG could effectively improve the hydrophilicity of MCM-41. The superior cyclohexene selectivity is mainly attributed to the hydrophilic modification of PEG to MCM-41, as well as the moderate catalytic activity, long-range order of mesoporous structure and good ruthenium dispersity of the catalyst.