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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
木蟲 (正式寫手)
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sirljz(金幣+2):謝謝交流 2010-04-30 22:03
lsoul24517(金幣+15, 翻譯EPI+1):謝謝幫忙 2010-05-03 12:17
sirljz(金幣+2):謝謝交流 2010-04-30 22:03
lsoul24517(金幣+15, 翻譯EPI+1):謝謝幫忙 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. 使用石墨單色化Cu, Ka 輻射（1.54178）（這里你的文字不齊，應(yīng)是一個儀器的操作條件） Philiphs X’Pert Super衍射儀作X射線衍射，在10-80度范圍內(nèi)進行。使用掃描電鏡（SEM，X-650微分析儀）對產(chǎn)物作晶形鑒別。場發(fā)射掃描電鏡（JEQL JSM-6300F，15KV）作FESEM成像。作用Hitachi 800透射電子顯微鏡作透射電子顯微鏡圖像，使用加速電壓200KV。樣品分散于無水乙醇中并于SEM，F(xiàn)ESEM及TEM測試前超聲。 |
3樓2010-04-30 21:36:13
pharmjackie
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sirljz(金幣+2):學習交流 2010-04-30 22:02
lsoul24517(金幣+15):謝謝啦 2010-05-03 12:17
sirljz(金幣+2):學習交流 2010-04-30 22:02
lsoul24517(金幣+15):謝謝啦 2010-05-03 12:17
|
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. 所有試劑均為分析純，使用前沒做任何純化。通用合成CeO2球形微晶的步驟是將5毫摩爾硝酸鈰*六水合物及10毫摩爾PVP（重復單元）溶解于40毫升蒸餾水中，磁力攪拌30分鐘使澄清（或譯為使成均相）。將所得溶液轉(zhuǎn)移到一個50毫升的有聚四氟乙烯襯里的不銹鋼高壓釜并使釜溫保持在140度24小時后自然冷至室溫，濾去淡黃色沉淀，蒸餾水洗滌后無水乙醇（洗滌？你的東西里沒有這一句）幾次，真空80度干燥12小時。 |
2樓2010-04-30 21:28:03
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