【摘 要】
：
Ce0.5Zr0.5O2 solid solution was successfully synthesized using cerium nitrate,zirconium nitrate,and urea as raw materials by the microwave irradiation method an
【机 构】
：
School of Chemistry and Materials Science,Ludong University,Yantai 264025,China
论文部分内容阅读
Ce0.5Zr0.5O2 solid solution was successfully synthesized using cerium nitrate,zirconium nitrate,and urea as raw materials by the microwave irradiation method and charactefizde by X-ray diffraction,fluorescence spectrum,transmission electron microscopy,and infrared spectrum.Its acid catalytic activity was evaluated in the esterification reaction of acetic acid and n-butyl alcohol.The results show that Ce0.5Zr0.5O2 solid solution has cubic fluorite structure,and its particle diameter is in the nanometer scale.As a sort of solid acid,it possesses a higher acid catalytic activity and can be easily separated from reaction liquids.It can be used for several times,and basically,its activity keeps constant.The proton acid sites and Lewis acid sites exist in the structure of Ce0.5Zr0.5O2 solid solution.
其他文献
钙拮抗剂异搏停和抗心律失常药奎尼丁同地高辛在药代动力学的相互作用,能升高血浆地高辛浓度和增强对心脏的作用。本文作者研究了另一些钙拮抗剂和抗心律失常药与地高辛的相
A perovskite-type oxide,La0.8Sr0.2MnO3,was synthesized by the organic solvent sol-gel method.The desired metal cations were chelated in a solution by using citr
《段嗣基墓志》全称《唐故沧州东光县令段府君墓志铭并序》,刻于永淳二年(六八三),志高七十厘米,志宽七十厘米。志文凡二十九行,满行二十九字,全志共七百七十五字,楷书,有界
吴澄生活在宋元之际。宋元之际既有理学的流行,也有心学的发用,所以他的哲学思想具有双重特点,既吸收了理学的精华,也看到了心学的长处。他把这两种学说经过损益之后融会贯通
大力发展机构投资是我国资本市场发展的内在要求,而继续扩大证券投资基金规模,规范基金管理公司的发展正适应了这一要求。虽然在过去的几年中,我国证券基金有了长足的发展,
对粉末冶金法制备的Mo-30Cu合金板材,在不同工艺条件下进行轧制试验,采用金相显微镜及扫描电镜对轧制变形后的组织进行观察,并采用维氏硬度计对经过不同道次变形量的材料进行
此类不明原因的坏死性淋巴结炎多见于青少年,有发热、浅表淋巴结肿大、淋巴结无嗜中性白细胞浸润的凝固性坏死灶,伴有淋巴细胞、组织细胞增生等,易被误诊为恶性淋巴瘤。此病
对于资本市场的热捧,胡葆森表示:“这也意味着建业正式从资本市场本科毕业。”中国过去的20年,城镇化建设取得了巨大的成果,但是也带来了很多负面的问题。全国人大代表、建业
本文所用缩写: APTT 活化的部分凝血活酶时间 AT-Ⅲ抗凝血酶Ⅲ CLP 糜蛋白酶样蛋白质 DIC 弥散性血管内凝血 EGT 乙醇胶试验 ELP 弹性硬蛋白酶样蛋白质 ELT 优球蛋白凝块溶
The crystal structures and hydrogenation behavior of the (Ca0.9Sr0.1)8(Al1-xZnx)3(x=0,0.1,0.2,0.3 and 0.4) alloys were investigated.The new phase (Ca,Sr)2(Al,Zn