Department of Chemistry, University of Science and Technology of China, Hefei 230026, PR China.
ACS Appl Mater Interfaces. 2012 Sep 26;4(9):4672-82. doi: 10.1021/am3010434. Epub 2012 Sep 4.
This work described the preparation, characterization, and electrochemical behavior toward heavy metal ions of the AlOOH-reduced graphene oxide nanocomposites. This new material was synthesized through a green one-pot hydrothermal method. The morphologic and structure of the nanocomposites were characterized using atomic force microscopy, X-ray diffraction, Raman spectroscopy, X-ray photoemission spectroscopy, Fourier transform-infrared spectroscopy, and transmission electron microscopy. Electrochemical properties were characterized by cyclic voltammetry and electrochemical impedance spectroscopy. The chemical and electrochemical parameters that have influence on deposition and stripping of metal ions, such as pH value, deposition potential, and deposition time, were also studied. Due to the strong affinity of AlOOH to heavy metal ions and the fast electron-transfer kinetics of graphene, the combination of solid-phase extraction and stripping voltammetric analysis allowed fast and sensitive determination of Cd(II) and Pb(II) in drinking water, making these new nanocomposites promising candidates for practical applications in the fields of detecting heavy metal ions. Most importantly, these new nanocomposites may possess many unknown properties waiting to be explored.
本工作描述了 AlOOH 还原氧化石墨烯纳米复合材料的制备、表征和对重金属离子的电化学行为。这种新材料是通过绿色的一步水热法合成的。通过原子力显微镜、X 射线衍射、拉曼光谱、X 射线光电子能谱、傅里叶变换红外光谱和透射电子显微镜对纳米复合材料的形貌和结构进行了表征。通过循环伏安法和电化学阻抗谱对电化学性能进行了表征。还研究了影响金属离子沉积和剥离的化学和电化学参数，如 pH 值、沉积电位和沉积时间。由于 AlOOH 对重金属离子的强亲和力和石墨烯的快速电子转移动力学，固相结合萃取和剥离伏安分析的结合可以快速灵敏地测定饮用水中的 Cd(II)和 Pb(II)，使这些新型纳米复合材料成为检测重金属离子领域实际应用的有前途的候选材料。最重要的是，这些新型纳米复合材料可能具有许多未知的有待探索的特性。
