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guozhi2009

铁虫 (正式写手)

[求助] 纳米银合成量的问题

A 59.2 mL solution containing 0.6 mM
trisodium citrate (Fisher) and 2mM NaBH4 (Alfa Aesar) was
prepared in deionized (DI) water (Millipore, 18.3 MΩ· cm)
and stirred vigorously in an ice bath. As 0.8 mL of 15 mM
AgClO4 (Alfa Aesar) was added into the mixture, the solution
turned to yellow, indicating formation of nAg. Following 3 h
of additional stirring atroomtemperature, soluble byproducts
were removed by centrifugal ultrafiltration (Amicon Ultra-
15 3K, Millipore, MA) and DI water addition in two cycles,
after which the nAg stock suspensions at 40 mg/L were stored
at 4 °C for later use.

按这种方法合成纳米银,就算所有的银离子都变成纳米银,也才有0.001g多一点,离心之后能有多少沉淀呢,那点沉淀怎么取下来,就算成倍增加加入的试剂和水,离心机最大的量也只有50ml,每个离心管的离心下来的量也很少,各位是怎么提取出来的呢
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lidx0269

金虫 (著名写手)

ATRP 巯基/二硫 纳米金


【答案】应助回帖

感谢参与,应助指数 +1
哪个文献告诉你要离心了?离心就聚集了,不是纳米银了
2楼2013-03-12 22:09:51
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guozhi2009

铁虫 (正式写手)

soluble byproducts
were removed by centrifugal ultrafiltration (Amicon Ultra-
15 3K, Millipore, MA) and DI water addition in two cycles,
这上面这么写的啊,那要不离心的话怎么才能提取出来呢
3楼2013-03-14 13:28:17
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