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xfxzjm金虫 (正式写手)
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[求助]
制的氧化石墨厚的跟棉被似的,谁有制薄层氧化石墨烯的要点啊?重金悬赏!
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我制的氧化石墨烯特别的厚,3-5个纳米,有的甚至10个纳米,制作方法如下: Graphite (1 g) was prior ground with NaCl (50 g) for 10 min. Then the NaCl was dissolved in water and removed by filtration. After being washed with deionized water several times, the remaining graphite was stirred in 23 mLof concentrated H 2SO4 for 8 h. Then, 3 g of KMnO4 was slowly added while keeping the round-bottom flask in an ice bath.Subsequently, the mixture was stirred at 35–40C for 30 min, then at 65–80C for 45 min. Next, 46 mL of water was added into the mixture and heated at 98–105C for 30 min. The reac-tion was terminated by addition of distilled water (140 mL) and 30% H2O2 solution (10 mL), causing the color of the suspension to turn bright yellow. The products were washed with 5% HCl and then with deionized water by repeated centrifugation. 请哪位大仙也做过类似的啊,帮忙指出要点啊,怎么才能做出薄的氧化石墨烯啊! |
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