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sherry93126

新虫 (正式写手)

[求助] 石墨烯量子点的分离问题 已有3人参与

0.21 g (1 mmol) citric acid and 0.23 g (3 mmol) thiourea were
dissolved into 5 ml water, and stirred to form a clear solution.
Then the solution was transferred into a 20 ml Teon lined
stainless autoclave. The sealed autoclave was heated to 160 C
in an electric oven and kept for additional 4 hours. The final
product was collected by adding ethanol into the solution and
centrifuged at 5000 rpm for 5 min. The solid can be easily
redispersed into water.

文献里面给出了这样的方法,可是最后分离的时候文献说加入乙醇,离心出固体,可是我都用1200转速离了20分钟了,还是离不出来,请问有人做过这种方法吗,要如何分离呢
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angel8533

铁杆木虫 (正式写手)

【答案】应助回帖

这个明显是水溶性量子点,一般是透析纯化,然后冷冻干燥得固体
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11楼2016-04-27 11:44:46
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