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ywyonly

新虫 (正式写手)

[求助] 制备石墨烯量子点为什么要先还原GO,再氧化?

RT。GSs were obtained by thermal
deoxidization of GO sheets in a tube furnace at 200–300 8C for 2 h with a
heating rate of 5 8C min1 in a nitrogen atmosphere. GSs (0.05 g) were
oxidized in concentrated H2SO4 (10 mL) and HNO3 (30 mL) for 15–20 h
under mild ultrasonication (500 W, 40 kHz). The mixture was then diluted
with deionized (DI) water (250 mL) and filtered through a 0.22-mm
microporous membrane to remove the acids. Purified oxidized GSs (0.2 g)
were re-dispersed in DI water (40 mL) and the pH was tuned to 8 with
NaOH. The suspension was transferred to a poly(tetrafluoroethylene)
(Teflon)-lined autoclave (50 mL) and heated at 200 8C for 10 h.
如上,先还原的目的是什么,我可以直接用GO来做(不还原)吗?
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zzkejing

禁虫 (正式写手)

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2楼2015-09-05 00:37:01
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Joe_lee

金虫 (小有名气)

可能是要做成石墨烯量子点,所以要还原吧。你现在用这个水热法做出量子点没?

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3楼2015-11-29 18:15:42
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