CAJ | 학술논문

以天然鳞片石墨为原料,用改进的Hummers法制备氧化石墨。超声分散制备氧化石墨烯溶液,通过加入不同量的水合肼调节溶液的pH值,再通过水热法热还原,制备了在水中稳定分散的石墨烯溶液。利用扫描电子显微镜（SEM）、高分辨透射电镜（HR-TEM）、拉曼光谱（Raman）、原子力显微镜（AFM）、X射线衍射分析（XRD）、zeta电位及光学显微镜对制备的样品进行了表征,研究了不同温度、pH值对石墨烯溶液稳定性的影响。
이천연린편석묵위원료,용개진적Hummers법제비양화석묵。초성분산제비양화석묵희용액,통과가입불동량적수합정조절용액적pH치,재통과수열법열환원,제비료재수중은정분산적석묵희용액。이용소묘전자현미경（SEM）、고분변투사전경（HR-TEM）、랍만광보（Raman）、원자력현미경（AFM）、X사선연사분석（XRD）、zeta전위급광학현미경대제비적양품진행료표정,연구료불동온도、pH치대석묵희용액은정성적영향。
A improved Hummers method was employed to prepare graphite oxide using natural flake graphite as raw materials. The graphene oxide solution was prepared by ultrasonic dispersion, and the pH value of solution was changed through adding different volume fraction of hydrazine hydrate. After hydrothermal reduction in au- toclave, stable dispersion graphene solutions were obtained. The as prepared samples were characterized by X- ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, atomic force microscope, zeta potential and optical microscope. The influence of temperature and pH value of the sta- bility of graphene solutions was investigated.