| Title | Preparation, characterization, and application of electrochemically functional graphene nanocomposites by one-step liquid-phase exfoliation of natural flake graphite with methylene blue |
| Authors | Zhang, Dongdong Fu, Lei Liao, Lei Liu, Nan Dai, Boya Zhang, Chengxiao |
| Affiliation | Xi An Jiao Tong Univ, Sch Med, Xian 710061, Peoples R China. Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China. Peking Univ, Acad Adv Interdisciplinary Studies, Ctr Nanochem CNC, Beijing 100871, Peoples R China. Shaanxi Normal Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Appl Surface & Colloid Chem, Xian 710062, Peoples R China. |
| Keywords | Graphene nanocomposite liquid-phase exfoliation methylene blue electrochemistry ENHANCED RAMAN-SCATTERING LARGE-AREA EPITAXIAL GRAPHENE CARBON NANOTUBES OXIDE FILMS ELECTRODE PLATFORM MULTILAYER ADSORPTION |
| Issue Date | 2012 |
| Publisher | nano research |
| Citation | NANO RESEARCH.2012,5,(12),875-887. |
| Abstract | Electrochemically functional graphene nanocomposites have been directly prepared by one-step liquid-phase exfoliation of natural flake graphite with methylene blue (MB). UV-visible spectra of the obtained aqueous dispersions of graphene-methylene blue (G-MB) nanocomposite at different exfoliation time indicate that the concentration of graphene dispersion increased markedly with increasing exfoliation time. Atomic force microscopy (AFM) and Raman spectroscopy verified that the graphene was exfoliated into single-layer or bilayer states. FT-IR spectroscopy of G-MB suggests that a pi-pi stacking interaction is involved in the structure-associated interactions between graphene and adsorbed MB molecules. A G-MB nanocomposite modified glassy carbon (GC) electrode exhibits excellent electrochemical properties and good electrochemical stability. Additionally, the G-MB/GC modified electrode shows more favorable electron transfer kinetics for potassium ferricyanide and potassium ferrocyanide probe molecules, which are important electroactive compounds, compared with reduced graphene oxide (RGO)-MB/GC, RGO/GC, bare GC and graphite/GC electrodes. Furthermore, the G-MB/GC modified electrode exhibits good electrocatalytic activity toward hydrogen peroxide (H2O2) and beta-nicotinamide adenine dinucleotide (NADH). The excellent electroactivity, electrochemical stability and electrocatalytic activity of the G-MB nanocomposites prepared in this work are potentially very useful for basic electrochemical studies and for the practical development of electronic devices such as biosensors and photovoltaic cells. |
| URI | http://hdl.handle.net/20.500.11897/164130 |
| ISSN | 1998-0124 |
| DOI | 10.1007/s12274-012-0271-9 |
| Indexed | SCI(E) 中国科学引文数据库(CSCD) |
| Appears in Collections: | 前沿交叉学科研究院 |
