氧化剂用量对氧化石墨烯合成的影响

Effect of Oxidant Dosage on Synthesis of Graphene Oxide

研究了改进Hummers法中氧化剂用量对所合成的氧化石墨烯结构和亲水性的影响,通过控制氧化剂用量制备了两种氧化石墨烯,采用原子力显微镜、红外光谱、拉曼光谱、X射线衍射、水接触角对氧化石墨烯进行了表征分析,研究了不同氧化剂用量下的氧化石墨烯的微观结构、氧化程度和亲水性。试验结果表明随着氧化剂用量增加,氧化石墨烯的厚度和横向尺寸变小,层间距不变,氧化程度增加,亲水性降低。

The effect of improving oxidant dosage in the Hummers method on the structure and hydrophilicity of synthesized graphene oxide was investigated.Two kinds of graphene oxide were prepared by controlling oxidant dosage.Graphene oxide was characterized by atomic force microscopy,infrared spectroscopy,Raman spectroscopy,X-ray diffraction,and water contact angle.The microstructure,oxidation degree and hydrophilicity of graphene oxide with different oxidant dosages were investigated.The experimental results show that with the increase of oxidant dosage,the thickness and lateral dimension of graphene oxide become smaller,the interlayer spacing remains unchanged,the degree of oxidation increases,and the hydrophilicity decreases.