4月上旬工作报告4月上旬工作报告.docVIP

复合材料 Improved Synthesis of Graphene Oxide We have found that excluding the NaNO3 ,increasing the amount of KMnO4,and performing the reaction in a9:1mixture of H2SO4/H3PO4 improves the efficiency of the oxidation process. 作者研究发现不使用NaNO3，增加KMnO4的用量，在H2SO4与H3PO4体积比为9:1的条件下反应，有利于促进氧化过程。 It should be noted that all three of these procedures involve the generation of the toxic gas(es) NO2,N2O4, and/or ClO2;the latter also being Explosive. 这三种实验方法都会产生NO2,N2O4或者 ClO2等有毒气体，hummers法更有爆炸的危险。 GO prepared from flake graphite can be readily dispersed in water. 从片状石墨制备的氧化石墨烯在水中的分散性很好。 Recently, we reported the scalable preparation of graphene oxide nanoribbons (GONRs) from multiwalled carbon nanotubes by treatment with KMnO4 and concentrated H2SO4 and the discovery that the addition of phosphoric acid (H3PO4) to this reaction produced GONRs with more intact graphitic basal planes. 近期，作者报道了利用KMnO4 和浓H2SO4处理多壁碳纳米管制备氧化石墨烯纳米带的方法，同时发现在反应中添加H3PO4制备出石墨面层完整的氧化石墨烯纳米带。 Moreover, even though IGO is as oxidized as HGO+and both are more oxidized than HGO,GO has a more regular structure with a greater amount of basal plane framework retained. 而且，即使改进的hummers法制备的氧化石墨烯和添加过量高锰酸钾制备的氧化石墨烯氧化程度一样，都比没有改进的hummers法氧化程度高，但改进的方法制备的氧化石墨烯结构更普通，保留了大量完整的石墨面层。 The advantages of the improved method, with its simpler protocol, higher yield, no toxic gas evolution during preparation, and equivalent conductivity upon reduction, make it attractive for preparing material on a large scale. 改进的方法优势明显，步骤简单，产量高，制备过程中没有有毒气体产生，还原后电导率不变，这使得该方法可以大规模制备氧化石墨烯。 It is also noteworthy that IGO appears to have more epoxide functionalities than either of the other GOs. 值得注意的是改进方法制备的氧化石墨烯比其他方法制备的含有更多的环氧官能团。 To determine the relative levels of oxidation,the C/O ratio was not used; it is unreliable because it is difficult to fully dehydrate a GO sample. 不使用C/O比来判断相对的氧化程度，因为难以去除氧化石墨烯中的水分。 For similar levels of overall oxidation, the IGO has a more regular structure than that of HGO+. 氧化程度相同的情况下，IG