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All the reagents were of analytical grade and were used without further purification. In a typical synthetic procedure of CeO2 spherical crystallites, 5 mmol of Ce(NO3)3â6H2O and 10 mmol of PVP (repeating units) were dissolved in 40 mL of distilled water and stirred magnetically for 30 min to get good homogeneity. The resulting solution was transferred into a 50 mL Teflon-lined stainless steel autoclave. The autoclave was maintained at 140 °C for 24 h. After cooling to room temperature naturally, the light-yellow precipitates were filtered off, washed with distilled water and anhydrous alcohol several times, and dried in a vacuum at 80 °C for 12 h. X-ray diffraction patterns were recorded by using a Philiphs X’Pert Super diffractometer with graphite monochromatized Cu Ka radiation (1.541 78 ) in the 2õ range of 10°-80°. The morphology of the products was examined by a scanning electron microscope (SEM) using an X-650 microanalyzer. FESEM images were taken on a field emission scanning electron microscope (JEOL JSM-6300F, 15 kV). Transmission electron microscopic (TEM) images were produced with a Hitachi 800 transmission electron microscope with the accelerating voltage of 200 kV. The samples used for characterization were dispersed in absolute ethanol and were ultrasonicated before SEM, FESEM, and TEM tests. [ Last edited by lsoul24517 on 2010-4-30 at 20:30 ] |
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pharmjackie
木虫 (正式写手)
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sirljz(金币+2):学习交流 2010-04-30 22:02
lsoul24517(金币+15):谢谢啦 2010-05-03 12:17
sirljz(金币+2):学习交流 2010-04-30 22:02
lsoul24517(金币+15):谢谢啦 2010-05-03 12:17
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All the reagents were of analytical grade and were used without further purification. In a typical synthetic procedure of CeO2 spherical crystallites, 5 mmol of Ce(NO3)3â6H2O and 10 mmol of PVP (repeating units) were dissolved in 40 mL of distilled water and stirred magnetically for 30 min to get good homogeneity. The resulting solution was transferred into a 50 mL Teflon-lined stainless steel autoclave. The autoclave was maintained at 140 °C for 24 h. After cooling to room temperature naturally, the light-yellow precipitates were filtered off, washed with distilled water and anhydrous alcohol several times, and dried in a vacuum at 80 °C for 12 h. 所有试剂均为分析纯，使用前没做任何纯化。通用合成CeO2球形微晶的步骤是将5毫摩尔硝酸铈*六水合物及10毫摩尔PVP（重复单元）溶解于40毫升蒸馏水中，磁力搅拌30分钟使澄清（或译为使成均相）。将所得溶液转移到一个50毫升的有聚四氟乙烯衬里的不锈钢高压釜并使釜温保持在140度24小时后自然冷至室温，滤去淡黄色沉淀，蒸馏水洗涤后无水乙醇（洗涤？你的东西里没有这一句）几次，真空80度干燥12小时。 |
2楼2010-04-30 21:28:03
pharmjackie
木虫 (正式写手)
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sirljz(金币+2):谢谢交流 2010-04-30 22:03
lsoul24517(金币+15, 翻译EPI+1):谢谢帮忙 2010-05-03 12:17
sirljz(金币+2):谢谢交流 2010-04-30 22:03
lsoul24517(金币+15, 翻译EPI+1):谢谢帮忙 2010-05-03 12:17
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X-ray diffraction patterns were recorded by using a Philiphs X’Pert Super diffractometer with graphite monochromatized Cu Ka radiation (1.541 78 ) in the 2õ range of 10°-80°. The morphology of the products was examined by a scanning electron microscope (SEM) using an X-650 microanalyzer. FESEM images were taken on a field emission scanning electron microscope (JEOL JSM-6300F, 15 kV). Transmission electron microscopic (TEM) images were produced with a Hitachi 800 transmission electron microscope with the accelerating voltage of 200 kV. The samples used for characterization were dispersed in absolute ethanol and were ultrasonicated before SEM, FESEM, and TEM tests. 使用石墨单色化Cu, Ka 辐射（1.54178）（这里你的文字不齐，应是一个仪器的操作条件） Philiphs X’Pert Super衍射仪作X射线衍射，在10-80度范围内进行。使用扫描电镜（SEM，X-650微分析仪）对产物作晶形鉴别。场发射扫描电镜（JEQL JSM-6300F，15KV）作FESEM成像。作用Hitachi 800透射电子显微镜作透射电子显微镜图像，使用加速电压200KV。样品分散于无水乙醇中并于SEM，FESEM及TEM测试前超声。 |
3楼2010-04-30 21:36:13
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