Modification of hydrogen zeolite with CeO2 and its catalysis application for preparing aspirin

来源 :2014中国功能材料科技与产业高层论坛 | 被引量 : 0次 | 上传用户:ahde2006
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  Hydrogen zeolite was modified with CeO2 by impregnation-filtration-heat treatment.Hydrogen-zeolite samples before and after modification were characterized by XRD and SEM.
其他文献
水热条件下,以双氧水和钼粉制备的过氧钼酸溶胶为钼源,乙醇为还原剂制备得到二氧化钼纳米棒。利用X-射线衍射(XRD)、扫描电子显微镜(SEM)以及场发射高分辨透射电子显微镜(HRTEM)对产物的结构与形貌进行表征。
Large-area SiNWs has been successfully fabricated through one-step metal-assisted chemical etching process at room temperature.The effects of key fabrication parameters (AgNO3 concentration, Fe (NO3)3
This article describes the results of an experient of the photochemistry of the Omnicat 650 and 550 photoinitiators and an evaluation of their efficiency in the photopolymerizations of several differe
Elucidation of the chemical structure changes that take place of high density polyethylene (HDPE) used as rotational packaging case by attenuated total reflection infrared spectroscopy (ATR-FTIR),when
实验以铝粉和硅酸钠为主要原料,溶胶凝胶法制备球形SiO2-Al2O3复合除氟剂。采用XRD分析法对样品进行测试和表征,研究了SiO2含量、焙烧温度、焙烧时间和溶液pH值对除氟效果的影响。
Contact angle data for sets of probe liquids allow the determination of components of solid surface energies which in turn can be used to calculate the work of adhesion of oil to the solid surface.
Nano-TiO2 modified fluorine-containing polyacrylate soap-free emulsion was successfully synthesized via soap-free emulsion polymerization technique, in which the polymerization monomers consisted of M
本文采用电化学法对La(Fe,Si)13系材料进行渗氢,通过实验研究电解温度对渗氢过程的影响。采用XRD和SEM对物相及表面形貌进行分析,并利用VSM检测样品的磁性能。实验结果表明:电解温度的提升有助于电化学渗氢反应的进行;
本文通过化学镀方法,在硬磁Nd-Fe-B粉末表面沉积Fe软磁层,形成Nd-Fe-B/α-Fe异质结构磁性粉末;并研究后续热处理对异质结构磁粉磁性能的影响.结果表明,化学镀法Nd-Fe-B硬磁粉末表面沉积的Fe在干燥过程中被氧化成Fe2O3,经过氢还原退火处理,Fe2O3被还原成α-Fe.
本文采用不同粒度β-SiC颗粒和滚镀工艺制备了Ni-P-β-SiC复合镀层.复合镀层厚度均匀且β-SiC颗粒在镀层中均匀分布.复合镀层厚度17~25μm,硬度520~620HV.与此同时,本文也针对Ni-P-β-SiC复合镀层的摩擦磨损行为进行了研究,结果表明,随着β-SiC颗粒粒度的增加复合镀层的摩擦磨损失重减小,但摩擦系数增加.