One-Step Electrochemical Approach to the Synthesis of Graphene/MnO2 Nanowall Hybrids

• Published in: Nano research 2011-07, Vol.4 (7), p.648-657
• Main Authors: Zhu, Chengzhou, Guo, Shaojun, Fang, Youxing, Han, Lei, Wang, Erkang, Dong, Shaojun
• Format: Article
• Language: English
• Subjects: Atomic/Molecular Structure and Spectra; Biomedicine; Biotechnology; Carbon; Chemical vapor deposition; Chemistry and Materials Science; Composite materials; Condensed Matter Physics; Electrochemistry; Electrodes; Electrons; Graphene; Graphite; Hybrids; Materials Science; Morphology; Nanocomposites; Nanomaterials; Nanotechnology; Quantum dots; Research Article; Spectroscopy; X-ray diffraction; X射线光电子能谱; 二氧化锰; 合成; 扫描电子显微镜; 杂交; 电化学方法; 石墨氧化物; 纳米复合材料
• ISSN: 1998-0124; 1998-0000
• DOI: 10.1007/s12274-011-0120-2

We have demonstrated a one-step and effective electrochemical method to synthesize graphene/MnO2 nanowall hybrids （GMHs）. Graphene oxide （GO） was electrochemically reduced to graphene （GN）, accompanied by the simultaneous formation of MnO2 with a nanowall morphology via cathodic electrochemical deposition. The morphology and structure of the GMHs were systematically characterized by scanning electron microscope （SEM）, X-ray photoelectron spectroscopy （XPS）, X-ray diffraction （XRD）, and Raman spectroscopy. The resulting GMHs combine the advantages of GN and the nanowall array morphology of MnO2 in providing a conductive network of amorphous nanocomposite, which shows good electrochemical capacitive behavior. This simple approach should find practical applications in the large-scale production of GMHs.