3D graphene-cobalt oxide electrode for high-performance supercapacitor and enzymeless glucose detection.

Using a simple hydrothermal procedure, cobalt oxide (Co(3)O(4)) nanowires were in situ synthesized on three-dimensional (3D) graphene foam grown by chemical vapor deposition. The structure and morphology of the resulting 3D graphene/Co(3)O(4) composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Raman spectroscopy. The 3D graphene/Co(3)O(4) composite was used as the monolithic free-standing electrode for supercapacitor application and for enzymeless electrochemical detection of glucose. We demonstrate that it is capable of delivering high specific capacitance of ∼1100 F g(-1) at a current density of 10 A g(-1) with excellent cycling stability, and it can detect glucose with a ultrahigh sensitivity of 3.39 mA mM(-1) cm(-2) and a remarkable lower detection limit of <25 nM (S/N = 8.5).

[1]  Peng Chen,et al.  Macroporous and monolithic anode based on polyaniline hybridized three-dimensional graphene for high-performance microbial fuel cells. , 2012, ACS nano.

[2]  Peng Chen,et al.  Biological and chemical sensors based on graphene materials. , 2012, Chemical Society reviews.

[3]  Mao-Sung Wu,et al.  Formation of nano-scaled crevices and spacers in NiO-attached graphene oxide nanosheets for supercapacitors , 2012 .

[4]  Hua Zhang,et al.  Graphene-based composites. , 2012, Chemical Society reviews.

[5]  Hua Zhang,et al.  Preparation of novel 3D graphene networks for supercapacitor applications. , 2011, Small.

[6]  Zhongai Hu,et al.  Preparation of reduced graphene oxide/cobalt oxide composites and their enhanced capacitive behaviors by homogeneous incorporation of reduced graphene oxide sheets in cobalt oxide matrix , 2011 .

[7]  Kuo-Chuan Ho,et al.  Cobalt oxide acicular nanorods with high sensitivity for the non-enzymatic detection of glucose. , 2011, Biosensors & bioelectronics.

[8]  Peng Chen,et al.  Growth of large-sized graphene thin-films by liquid precursor-based chemical vapor deposition under atmospheric pressure , 2011 .

[9]  Zhongwei Chen,et al.  Graphene-Based Flexible Supercapacitors: Pulse-Electropolymerization of Polypyrrole on Free-Standing Graphene Films , 2011 .

[10]  H. Dai,et al.  Co₃O₄ nanocrystals on graphene as a synergistic catalyst for oxygen reduction reaction. , 2011, Nature materials.

[11]  Lain-Jong Li,et al.  Graphene-based biosensors for detection of bacteria and their metabolic activities , 2011 .

[12]  Teng Zhai,et al.  Facile synthesis of large-area manganese oxide nanorod arrays as a high-performance electrochemical supercapacitor , 2011 .

[13]  Bing Li,et al.  One-step growth of graphene–carbon nanotube hybrid materials by chemical vapor deposition , 2011 .

[14]  S. Gunasekaran,et al.  A low-potential, H2O2-assisted electrodeposition of cobalt oxide/hydroxide nanostructures onto vertically-aligned multi-walled carbon nanotube arrays for glucose sensing , 2011 .

[15]  R. Ruoff,et al.  Carbon-Based Supercapacitors Produced by Activation of Graphene , 2011, Science.

[16]  Hui‐Ming Cheng,et al.  Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapour deposition. , 2011, Nature materials.

[17]  J. Tu,et al.  Mesoporous Co3O4 monolayer hollow-sphere array as electrochemical pseudocapacitor material. , 2011, Chemical communications.

[18]  L. Dai,et al.  Fullerene-Grafted Graphene for Efficient Bulk Heterojunction Polymer Photovoltaic Devices. , 2011, The journal of physical chemistry letters.

[19]  G. Lu,et al.  Nitrogen doped Sr₂Ta₂O₇ coupled with graphene sheets as photocatalysts for increased photocatalytic hydrogen production. , 2011, ACS nano.

[20]  Shaojun Guo,et al.  Graphene nanosheet: synthesis, molecular engineering, thin film, hybrids, and energy and analytical applications. , 2011, Chemical Society reviews.

[21]  Haoshen Zhou,et al.  Li-air rechargeable battery based on metal-free graphene nanosheet catalysts. , 2011, ACS nano.

[22]  Franklin Kim,et al.  Surfactant-free water-processable photoconductive all-carbon composite. , 2011, Journal of the American Chemical Society.

[23]  Qiyuan He,et al.  Electrical detection of metal ions using field-effect transistors based on micropatterned reduced graphene oxide films. , 2011, ACS nano.

[24]  Lianmao Peng,et al.  Quantum capacitance limited vertical scaling of graphene field-effect transistor. , 2011, ACS nano.

[25]  B. Jang,et al.  Graphene-based supercapacitor with an ultrahigh energy density. , 2010, Nano letters.

[26]  F. Wei,et al.  Fast and reversible surface redox reaction of graphene–MnO2 composites as supercapacitor electrodes , 2010 .

[27]  Yu Lei,et al.  Electrospun Co3O4 nanofibers for sensitive and selective glucose detection. , 2010, Biosensors & bioelectronics.

[28]  Wei Huang,et al.  In Situ Synthesis of Reduced Graphene Oxide and Gold Nanocomposites for Nanoelectronics and Biosensing , 2010, Nanoscale research letters.

[29]  Wenming Qiao,et al.  Rapid microwave-assisted synthesis of graphene nanosheet/Co3O4 composite for supercapacitors , 2010 .

[30]  R. Ruoff,et al.  Graphene and Graphene Oxide: Synthesis, Properties, and Applications , 2010, Advanced materials.

[31]  C. M. Li,et al.  Nanoelectronic biosensors based on CVD grown graphene. , 2010, Nanoscale.

[32]  G. Tulevski,et al.  Chemical doping of large-area stacked graphene films for use as transparent, conducting electrodes. , 2010, ACS nano.

[33]  Young Chun,et al.  Water-dispersible magnetite-reduced graphene oxide composites for arsenic removal. , 2010, ACS nano.

[34]  G. Eda,et al.  Chemically Derived Graphene Oxide: Towards Large‐Area Thin‐Film Electronics and Optoelectronics , 2010, Advanced materials.

[35]  Xiaodong Wu,et al.  Graphene oxide--MnO2 nanocomposites for supercapacitors. , 2010, ACS nano.

[36]  Peng Chen,et al.  Electrical Detection of DNA Hybridization with Single‐Base Specificity Using Transistors Based on CVD‐Grown Graphene Sheets , 2010, Advanced materials.

[37]  Anran Liu,et al.  Supercapacitors based on flexible graphene/polyaniline nanofiber composite films. , 2010, ACS nano.

[38]  Q. Ling,et al.  Ultra-large single-layer graphene obtained from solution chemical reduction and its electrical properties. , 2010, Physical chemistry chemical physics : PCCP.

[39]  Kwang S. Kim,et al.  Roll-to-roll production of 30-inch graphene films for transparent electrodes. , 2009, Nature nanotechnology.

[40]  Jun Liu,et al.  Glucose oxidase-graphene-chitosan modified electrode for direct electrochemistry and glucose sensing. , 2009, Biosensors & bioelectronics.

[41]  Shiren Wang,et al.  Thermal Expansion of Graphene Composites , 2009 .

[42]  Lain-Jong Li,et al.  Doping single-layer graphene with aromatic molecules. , 2009, Small.

[43]  Zhenhua Ni,et al.  Symmetry breaking of graphene monolayers by molecular decoration. , 2009, Physical review letters.

[44]  Bei Wang,et al.  HYDROTHERMAL SYNTHESIS AND OPTICAL, MAGNETIC, AND SUPERCAPACITANCE PROPERTIES OF NANOPOROUS COBALT OXIDE NANORODS , 2009 .

[45]  Kwang S. Kim,et al.  Large-scale pattern growth of graphene films for stretchable transparent electrodes , 2009, Nature.

[46]  B. H. Weiller,et al.  Practical chemical sensors from chemically derived graphene. , 2009, ACS nano.

[47]  Andre K. Geim,et al.  The rise of graphene. , 2007, Nature materials.

[48]  Andre K. Geim,et al.  Electric Field Effect in Atomically Thin Carbon Films , 2004, Science.

[49]  M. Gatta,et al.  Study of the electrochemical deposition and properties of cobalt oxide species in citrate alkaline solutions , 2002 .

[50]  J. Tarascon,et al.  Nano-sized transition-metal oxides as negative-electrode materials for lithium-ion batteries , 2000, Nature.

[51]  Guangmin Zhou,et al.  Graphene/metal oxide composite electrode materials for energy storage , 2012 .