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高锰酸钾法、碘量法和铈量法测定过氧化氢的比较 总被引:2,自引:0,他引:2
过氧化氢是一种常用的化学试剂,可作为消毒剂、杀菌剂、脱氧剂、漂白剂和聚合反应的引发剂等。目前过氧化氢的分析方法有高效液相色谱法、紫外分光光度法、流动注射-分光光度法和化学滴定法、高锰酸钾法、碘量法和硫酸铈法等。本文分别对高锰酸钾法、碘量法和铈量法测定过氧化氢进行比较。 相似文献
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Mesoporous (MSU) Ce0.5Zr0.5O2 mixed oxide with a high specific surface area has been synthesized under weak acidic condition in the presence of an anionic surfactant, sodium dodecylbenzenesulfonate. The effect of the pH value on the formation of mesostructure and the thermal stability of the material has been evaluated. The products were characterized by transmission electron microscopy, powder X-ray diffraction and nitrogen adsorption-desorption measurements. The results showed that the as-prepared Ce0.5Zr0.5O2 mixed oxide possessed a specific surface area of 163.3 m^2·g^-1, which had a cubic fluorite-type structure and possessed specific surface areas of 148.4 and 62.4 m^2·g^-1 after calcination at 500 and 800 ℃ for 2 h, respectively. The material showed excellent thermal stability. 相似文献
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高比表面CexZr1-xO2复合氧化物的制备及表征 总被引:2,自引:0,他引:2
分别采用共沉淀法和阴离子表面活性剂模板法制备了CexZr1-xO2复合氧化物。采用XRD、AFM、FTIR以及N2吸附-脱附等方法对样品进行了表征。结果表明,共沉淀法合成的样品在500 ℃煅烧2 h后,生成了立方相Ce0.75Zr0.25O2和四方相Ce0.5Zr0.5O2固溶体,比表面积为62.1 m2·g-1,孔体积为0.097 cm3·g-1;以阴离子表面活性剂十二烷基苯磺酸钠(SDBS)为模板剂,乙二胺为助模板剂合成的样品在500 ℃煅烧2 h后,生成了纯四方相Ce0.5Zr0.5O2固溶体,比表面积为180 m2·g-1,孔体积为0.182 cm3·g-1。结果表明,以阴离子表面活性剂SDBS为模板剂,可以合成高比表面积且具有介孔结构的Ce0.5Zr0.5O2复合氧化物;加入乙二胺作为助模板剂可明显的提高比表面积和孔体积。 相似文献
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