大孔径Cr-MCM-48合成及其催化性能
Journal Title: Science Paper Online - Year 2009, Vol 4, Issue 3
Abstract
用三嵌段共聚物P123(EO20PO70EO20)作为模板剂，正丁醇作助剂，通过pH值调节合成出了铬掺杂的大孔径三维立方介孔二氧化硅。反应体系中，Si/Cr 摩尔比为10～80．产物的真实Cr含量用原子吸收光谱(ICP-AES)测得；通过X射线衍射(XRD)、透射电子显微镜(TEM)、N2吸附脱附表征表明，产物具有规整的三维立方介孔结构。紫外可见吸收光谱、电子顺磁共振表征显示当掺杂量较小时（Si/Cr摩尔比大于30），铬的存在形态为Cr (VI)和Cr(V)，当掺杂量较大时，产生Cr (III)．用产物催化氧化环己烷，当用过氧化氢(H2O2)作为氧化剂时，环己烷的最大转化率达到53%；用叔丁基过氧化氢作氧化剂时，环己酮的转化率为86%．
Authors and Affiliations
Lei WANG , Lingzhi WANG , Guodong CHEN , Jinlong ZHANG
Keywords
Related Articles
- EP ID EP91468
- DOI -
- Views 102
- Downloads 0
Key concerns about hydrogen safety of fuel cell vehicles
The development of hydrogen safety of fuel cell vehicles (FCVs), including safety measures, testing experiment, and daily maintenance of on-board hydrogen system, were introduced based on long term experimental experienc...
双缺位杂多化合物催化环己烯环氧化研究
制备了一种双缺位型杂多化合物[(C4H9)4N]4[γ-SiW10O34(H2O)2]，并应用于催化环己烯环氧化反应。研究了反应温度、反应时间、反应物料比和催化剂用量对反应结果的影响，确定了最佳的反应工艺条件。并通过对反应体系进行减压蒸馏研究了催化...
Preparation processes of KNN lead-free piezoelectric ceramics
Lead zirconium titanate (PZT) ceramics and PZT-based ternary-component ferroelectrics are high-performance piezoelectric materials, which are widely used in sensors, actuators and other electronic devices. From the viewp...
Sn修饰的Ni/Al2O3对降解<br /> N,N-二甲基甲酰胺制氢反应的催化性能<br />
利用浸渍法制备了一系列不同含量Sn修饰的Ni/Al2O3催化剂(Ni-Sn/Al2O3)，并考察了催化剂对降解N,N-二甲基甲酰胺(DMF)制氢反应的催化性能。结果表明，利用Sn修饰Ni/Al2O3催化剂提高了其降解DMF制氢活性，当Sn/Ni摩尔比为0.1时，H2的产率从N...
Experimental study on intervene action of zinc, selenium on arsenic induced lipid peroxidation in mice
To investigate the effect of arsenic on lipid peroxidation in mice liver and observe the intervention effect of zinc and selenium supplement [Methods] Subchronic toxicity experiment is applied. Then the mice organism and...