我是用H法做的氧化石墨烯,用了原料是纳米石墨烯片!为什么做出来的氧化石墨烯在200度氩气环境下不到一个小时就减少了一半的质量,但这个文献 (Thermal stability of graphite oxide
Hae-Kyung Jeong, Yun Pyo Lee, Mei Hua Jin, Eun Sung Kim, Jung Jun Bae, Young Hee Lee)氧化石墨烯在200下两个小时,质量都没啥变化 ,求各位大神赐教啊!还有我对石墨烯不太了解,就是用H法做氧化石墨烯:氧化,然后加H2O2还原,然后洗涤,离心,这样烘干后得到的是单层的嘛氧化石墨烯吗?(原料是纳米石墨烯片,nanosheet)!!!跪求指教!!!!
嗯 ,就是看见一片文献:“Preparation of graphene nanosheet. Natural graphite powder (1 g, 99.99%, Sigma-
Aldrich) was first stirred in concentrated sulphuric acid (H2SO4, 23 mL) followed by the addition of sodium nitrate (NaNO3, 0.5 g) at room temperature. The stirring lasted for 16h, after that the mixture was cooled down to 0 °C. Potassium permanganate (K2MnO4, 3g) was then added into the solution. After 2 h, a green slurry was formed at around 35 °C,which was then stirred for another 3 h. Then, H2O (46 mL) was slowly added into the
solution at around 98 °C. The suspension was kept at this temperature for 30 min before it was further diluted with another addition of water and hydrogen peroxide (H2O2, 140
mL). The suspension was subsequently filtered and washed until reaching a neutral pH, then dried in a vacuum oven at 60 °C to obtain graphite oxide (GO). To obtain graphene, the as-synthesized GO was heated at around 1050 °C in Ar atmosphere for 30 s in a tube furnace”.我知道他这个大致做法和H法差不多,随后把获得的氧化石墨烯1050度处理30秒得到石墨烯!但感觉这里面也没讲超声啊,超声的步骤难道都是默认的吗!他这么做最后得到是什么样石墨烯?是厚度比较薄的石墨烯吗!那个氧化石墨烯烘干到底啥颜色啊!我那个石墨烯片roduct Description:
TimesGraphTM ----Graphite Nanoplatelet ( Graphene Nanoplatelet )
Purity:>99.5wt%
Thickness:4-20nm
layers:<30
Diameter:5-10μm
Dengsity: 0.23g/cm3
Volume Resistivity:4*10-4 ohm.cm
PH Value:PH=7.00-7.65(30℃)!是从中国科学院成都有机化学有限公司买的,我想问的是我的这个东西按H法能做出和用简单石墨做原料同样的效果吗(就是上面讲的那个文献)