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洪娃子新蟲 (小有名氣)
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[求助]
關于用夏幼男方法制備銅納米線 已有3人參與
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| 新搭建了雙排管,用夏幼男方法制備銅納米線,反應物為二水氯化銅,還原劑為葡萄糖,封端劑為十六胺,溶劑為水。反應物放在樣品袋里,用水泵抽真空時,真空度可以達到-0.095MPa,但是有大量的氣泡產(chǎn)生,抽很久真空都抽不掉。加熱到100度反應,溶液是黃綠色的,離心沉淀下來,沉淀還是淺藍色的。我現(xiàn)在懷疑是不是葡萄糖失效了,或者是水的問題,求各位大神可以幫我分析分析到底是哪里出現(xiàn)了問題? |
納米材料制備 |
銀蟲 (小有名氣)
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夏幼南不是直接在玻璃瓶里反應的? All the chemicals were obtained from Sigma-Aldrich and used as received. In a standard synthesis of Cu nanowires, 21 mg CuCl2·2H2O, 180 mg HDA, and 50 mg glucose (α or form) were dissolved in 10 mL water in a 22.2-mL vial (borosilicate glass vial, with a black phenolic molded screw cap and polyvinyl-faced pulp liner, VWR International, Radnor, PA) at room temperature. After the vial had been capped, the solution was magnetically stirred at room temperature overnight. The capped vial was then transferred into an oil bath and heated at 100 oC for 6 h under magnetic stirring. |
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抽真空時,當真空度低于2000~3000pa左右, 水就會蒸發(fā)的,即產(chǎn)生冒泡現(xiàn)象。蒸發(fā)就會吸熱,再過一會就會凍成一坨,這就是真空冷凍干燥的原理。 發(fā)自小木蟲Android客戶端 |
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